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电气/仪表工程师
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聚合硫酸铁的检验和应用?
<DIV align=center> <TABLE class=MsoNormalTable style="WIDTH: 571pt; mso-cellspacing: 0cm; mso-padding-alt: 0cm 0cm 0cm 0cm" cellSpacing=0 cellPadding=0 width=761 border=0> <TBODY> <TR style="HEIGHT: 100.5pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes"> <TD style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 0cm; BORDER-TOP: #ece9d8; PADDING-LEFT: 0cm; BACKGROUND: #f0f2fd; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 31.7pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 100.5pt" width=42> < class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com ffice ffice" /><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 0cm; BORDER-TOP: #ece9d8; PADDING-LEFT: 0cm; BACKGROUND: #f0f2fd; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; WIDTH: 539.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; HEIGHT: 100.5pt" vAlign=top width=719> < class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">中华人民共和国化工行业标准<SPAN lang=EN-US>HG 2153-91 <o:p></o:p></SPAN></SPAN></P> < class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">1</SPAN></B><A name=t2></A><SPAN style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</SPAN><B><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">主题内容与适用范围</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> <o:p></o:p></SPAN></P> < class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">本标准规定了聚合硫酸铁产品的技术要求、试验方法、检验规则、标志、包装、运输、贮存、安全要求。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> < class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">本标准适用于以硫酸亚铁和硫酸(包括硫酸酸洗废酸)为原料制得的 液体聚合硫酸铁 。该产品作为净水剂,可用于工业用水的预处理以及工业废水、城市污水、污泥的处理。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分子式:<SPAN lang=EN-US>[Fe<SUB>2</SUB></SPAN>(<SPAN lang=EN-US>OH</SPAN>)<SUB><SPAN lang=EN-US>n</SPAN></SUB>(<SPAN lang=EN-US>SO<SUB>4</SUB></SPAN>)<SUB><SPAN lang=EN-US>3-n/2</SPAN></SUB><SPAN lang=EN-US>]<SUB>m</SUB></SPAN>。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">2</SPAN></B><A name=t3></A><B><SPAN style="FONT-SIZE: 18pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</SPAN></B><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">引用标准</SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 190</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">危险货物包装标志</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 191</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">包装贮运图示标志</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 601</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">化学试剂滴定分析(容量分析)用标准溶液的制备</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 602</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">化学试剂杂质测定用标准溶液的制备</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 603</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">化学试剂试验方法中所用制剂及制品的制备</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 6678</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">化工产品采样总则</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">GB 6682</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">实验室用水规格</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">3</SPAN></B><A name=t4></A><B><SPAN style="FONT-SIZE: 18pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</SPAN></B><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">技术要求</SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">3.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">外观:红褐色液体,无沉淀。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">3.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">聚合硫酸铁应符合表<SPAN lang=EN-US>l</SPAN>要求。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P> <TABLE class=MsoNormalTable style="WIDTH: 538.5pt; mso-cellspacing: .7pt; mso-padding-alt: 6.75pt 6.75pt 6.75pt 6.75pt" cellSpacing=1 cellPadding=0 width=718 border=1> <TBODY> <TR style="HEIGHT: 16.5pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; HEIGHT: 16.5pt; BACKGROUND-COLOR: transparent" vAlign=top width="50%" rowSpan=2> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">指标名称</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; HEIGHT: 16.5pt; BACKGROUND-COLOR: transparent" vAlign=top width="50%" colSpan=2> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">指标</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR> <TR style="HEIGHT: 16.5pt; mso-yfti-irow: 1"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 24%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; HEIGHT: 16.5pt; BACKGROUND-COLOR: transparent" vAlign=top width="24%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一等品</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 26%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; HEIGHT: 16.5pt; BACKGROUND-COLOR: transparent" vAlign=top width="26%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">合格品</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR> <TR style="mso-yfti-irow: 2"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="50%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">密度<SPAN lang=EN-US>,</SPAN>质<SPAN lang=EN-US> ≥</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 24%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="24%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">1.45</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 26%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="26%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">1.33</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR> <TR style="mso-yfti-irow: 3"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="50%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">全铁含量<SPAN lang=EN-US> ≥</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 24%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="24%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">11.0</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 26%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="26%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">9.0</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR> <TR style="mso-yfti-irow: 4"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="50%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">还原性物质<SPAN lang=EN-US>(</SPAN>以<SPAN lang=EN-US>Fe<SUP>2+</SUP></SPAN>计<SPAN lang=EN-US>)</SPAN>含量<SPAN lang=EN-US>,% ≤</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 24%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="24%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.10</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 26%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="26%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.20</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR> <TR style="mso-yfti-irow: 5"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="50%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">盐基度<SPAN lang=EN-US>,% ≥</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 24%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="24%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">12.0</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 26%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="26%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">8.0</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR> <TR style="mso-yfti-irow: 6; mso-yfti-lastrow: yes"> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 50%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="50%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">PH(1%</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">水溶液<SPAN lang=EN-US>)</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 24%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="24%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">2.0</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">~<SPAN lang=EN-US>3.0</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: #ffffff; PADDING-RIGHT: 6.75pt; BORDER-TOP: #ffffff; PADDING-LEFT: 6.75pt; PADDING-BOTTOM: 6.75pt; BORDER-LEFT: #ffffff; WIDTH: 26%; PADDING-TOP: 6.75pt; BORDER-BOTTOM: #ffffff; BACKGROUND-COLOR: transparent" vAlign=top width="26%"> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">2.0</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">~<SPAN lang=EN-US>3.0</SPAN></SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: #006699; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR></TBODY></TABLE> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> <SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4</SPAN></B><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、<A name=t5></A>试验方法</SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试验方法中,除特殊规定外,只应使用分析纯试剂和符合<SPAN lang=EN-US>GB 6682</SPAN>中规定的三级水。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试验中所需标准溶液、制剂及制品,在没有注明其他规定时,均按<SPAN lang=EN-US>GB 601</SPAN>、<SPAN lang=EN-US> GB 603</SPAN>之规定制备。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">密度的测定(密度计法)<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.1</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">方法提要<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">由密度计在被测液体中达到平衡状态时所浸没的深度读出该液体的密度。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.2</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">仪器、设备<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">密度计:刻度值为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue=".001" UnitName="g"><SPAN lang=EN-US>0.001g</SPAN></st1:chmetcnv><SPAN lang=EN-US>/cm<SUP>3</SUP></SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">恒温水浴:可控制温度<SPAN lang=EN-US>20±l℃</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">温度计:分度值为<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="1" UnitName="℃"><SPAN lang=EN-US>1℃</SPAN></st1:chmetcnv>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">量筒:<SPAN lang=EN-US>250</SPAN>~<SPAN lang=EN-US>500mL</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.1.3</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">测定步骤<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">将聚合硫酸铁试样注入清洁、干燥的量筒内,不得有气泡。将量筒置于<SPAN lang=EN-US>20±1℃</SPAN>的恒温水浴中,待温度恒定后,将密度计缓缓地放入试样中,待密度计在试样中稳定后,读出密度计弯月面下缘的刻度(标有读弯月面上缘刻度的密度计除外),即为<SPAN lang=EN-US>20℃</SPAN>试样的密度。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">全铁含量的测定<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.1</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">重铬酸钾法<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.1</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">方法提要<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">在酸性溶液中,用氯化亚锡将三价铁还原为二价铁,过量的氯化亚锡用氯化汞予以除去,然后用重铬酸钾标准滴定溶液滴定,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">反应方程式为:<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">2Fe<SUP>3+</SUP>+Sn<SUP>2+</SUP>=2Fe<SUP>2+</SUP>+Sn<SUP>4+</SUP><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">SnCl<SUB>2</SUB>+2HgCl<SUB>2</SUB>=SnCl<SUB>4</SUB>+Hg<SUB>2</SUB>Cl<SUB>2</SUB><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6Fe<SUP>2+</SUP>+Cr<SUB>2</SUB>O<SUB>7</SUB><SUP>2-</SUP>+14H<SUP>+</SUP>=6Fe<SUP>3+</SUP>+2Cr<SUP>3+</SUP>+7H<SUB>2</SUB>O<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.1</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试剂和溶液<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">a</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">,氯化亚锡(<SPAN lang=EN-US>GB 638</SPAN>)溶液:<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="250" UnitName="g"><SPAN lang=EN-US>250g</SPAN></st1:chmetcnv><SPAN lang=EN-US>/L</SPAN>盐酸溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取<SPAN lang=EN-US>25.0g</SPAN>氯化亚锡置于干燥的烧杯中,溶于<SPAN lang=EN-US>20mL</SPAN>盐酸(<SPAN lang=EN-US>GB 622</SPAN>),冷却后稀释到<SPAN lang=EN-US>100 mL</SPAN>,保存于棕色瓶中,加入高纯锡粒数颗。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">b.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">盐酸(<SPAN lang=EN-US>GE 622</SPAN>)溶液:<SPAN lang=EN-US>l</SPAN>+<SPAN lang=EN-US>l</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">c.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">氯化汞(<SPAN lang=EN-US>HG 3</SPAN>-<SPAN lang=EN-US>1068</SPAN>)饱和溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">d.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">硫一磷混酸;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">将<SPAN lang=EN-US>150mL</SPAN>硫酸(<SPAN lang=EN-US>GB 625</SPAN>),溶于<SPAN lang=EN-US>500mL</SPAN>水中,再加<SPAN lang=EN-US>150mL</SPAN>磷酸(<SPAN lang=EN-US>GB 1282</SPAN>),然后稀释到<SPAN lang=EN-US>1000ml</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">e.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">重铬酸钾(<SPAN lang=EN-US>GB 642</SPAN>)标准滴定溶液:<SPAN lang=EN-US>c(1/6K<SUB>2</SUB>Cr<SUB>2</SUB>O<SUB>7</SUB>)=0.1mol/L</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">f.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">二苯胺磺酸钠(<SPAN lang=EN-US>HG 3</SPAN>-<SPAN lang=EN-US>621</SPAN>)溶液:<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="5" UnitName="g"><SPAN lang=EN-US>5g</SPAN></st1:chmetcnv><SPAN lang=EN-US>/L</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.1</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析步骤<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取约<SPAN lang=EN-US>1.5g</SPAN>试样,精确至<SPAN lang=EN-US>0.001g,</SPAN>置于<SPAN lang=EN-US>250mL</SPAN>锥形瓶中,加水<SPAN lang=EN-US>20mL</SPAN>,加盐酸溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.2.1</SPAN></st1:chsdate><SPAN lang=EN-US>.2.b</SPAN>)<SPAN lang=EN-US>20mL</SPAN>,加热至沸,趁热滴加氯化亚锡溶液(<SPAN lang=EN-US>4.2.1.2.a</SPAN>)至溶液黄色消失,再过量一滴,快速冷却,加氯化汞溶液(<SPAN lang=EN-US>4.2.1.2.c</SPAN>)<SPAN lang=EN-US>5mL</SPAN>,摇匀后静置<SPAN lang=EN-US>1min</SPAN>,然后加水<SPAN lang=EN-US>50mL</SPAN>,再加入硫一磷混酸<SPAN lang=EN-US>(4.2.1.2.d)10mL</SPAN>,二苯胺磺酸钠指示液(<SPAN lang=EN-US>4.2.1.2.f</SPAN>)<SPAN lang=EN-US>4</SPAN>~<SPAN lang=EN-US>5</SPAN>滴,用重铬酸钾标准滴定溶液(<SPAN lang=EN-US>4.2.1.2.e</SPAN>)滴定至紫色(<SPAN lang=EN-US>30s</SPAN>不褪)即为终点。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.1</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析结果的表述<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">以质量百分数表示的全铁含量<SPAN lang=EN-US>X<SUB>1</SUB></SPAN>按式<SPAN lang=EN-US>(1)</SPAN>计算<SPAN lang=EN-US>:<o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">X<SUB>1</SUB>=V·C×0.05585/m×100…………………………………………(1)<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">式中:<SPAN lang=EN-US>V</SPAN>一一化学计量点时试样所消耗的重铬酸钾标准滴定溶夜的体积,<SPAN lang=EN-US>ml</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">c</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一一重铬酸钾标准滴定溶液的浓度,<SPAN lang=EN-US>mol/L</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">m</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">-一试样的质量,<SPAN lang=EN-US>g</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.05585――</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">与<SPAN lang=EN-US>1.00mL</SPAN>重络酸钾的标准滴定溶液(<SPAN lang=EN-US>c</SPAN>(<SPAN lang=EN-US>1/6K<SUB>2</SUB>Cr<SUB>2</SUB>O<SUB>7</SUB></SPAN>)<SPAN lang=EN-US>=1.000mol</SPAN>/<SPAN lang=EN-US>L</SPAN>〕相当的,以克表示的铁的质量。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">所得结果应表示至二位小数。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.2</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">三氯化钛法<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">方法提要<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">在酸性溶液中,滴加三氯化钛溶液,将三价铁离子还原为二价,过量的三氯化钛进一步将钨酸钠指示液还原生成<SPAN lang=EN-US>“</SPAN>钨蓝<SPAN lang=EN-US>”</SPAN>,使溶液呈蓝色。在铜盐的催化下,借助水中的溶解氧,氧化过量的三氯化钛,待溶液的蓝色消失后,即以二苯胺磺酸钠为指示液,用重铬酸钾标准滴定溶液滴定。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">反应方程式为:<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">Fe<SUP>3+</SUP>+Ti<SUP>3+</SUP>=Fe<SUP>2+</SUP>+Ti<SUP>4+</SUP><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6Fe<SUP>2+</SUP>+Cr<SUB>2</SUB>O<SUB>7</SUB><SUP>2-</SUP>+14H<SUP>+</SUP>=6Fe<SUP>3+</SUP>+2Cr<SUP>3+</SUP>+7H<SUB>2</SUB>O<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试剂和溶液<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">a.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">盐酸(<SPAN lang=EN-US>GB 622</SPAN>)溶液:<SPAN lang=EN-US>l</SPAN>+<SPAN lang=EN-US>l</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">b.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">硫酸(<SPAN lang=EN-US>GB 625</SPAN>)溶液:<SPAN lang=EN-US>l</SPAN>+<SPAN lang=EN-US>l</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">c.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">磷酸(<SPAN lang=EN-US>GB 1282</SPAN>)溶液:<SPAN lang=EN-US>15+85</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">d.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">硫酸铜(<SPAN lang=EN-US>GB 665</SPAN>)溶液:<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="5" UnitName="g"><SPAN lang=EN-US>5g</SPAN></st1:chmetcnv><SPAN lang=EN-US>/L</SPAN>,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">e.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">三氯化钛溶液:量取<SPAN lang=EN-US>25ml l5</SPAN>%的三氯化钛溶液,加入<SPAN lang=EN-US>20mL</SPAN>盐酸(<SPAN lang=EN-US>GB 622</SPAN>),用水稀释至<SPAN lang=EN-US>100mL</SPAN>,混匀,贮于棕色瓶中,溶液上面加一薄层液体石蜡保护,可用<SPAN lang=EN-US>15d</SPAN>左右。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">f.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">钨酸钠溶液:<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="25" UnitName="g"><SPAN lang=EN-US>25g</SPAN></st1:chmetcnv>/<SPAN lang=EN-US>L</SPAN>。称取<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="2.5" UnitName="g"><SPAN lang=EN-US>2.5g</SPAN></st1:chmetcnv>钨酸钠,溶解于<SPAN lang=EN-US>70mL</SPAN>水中,加入<SPAN lang=EN-US>7mL</SPAN>磷酸(<SPAN lang=EN-US>GB 1282</SPAN>),冷却后用水稀释至<SPAN lang=EN-US>100mL</SPAN>,混匀,贮于棕色瓶中。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">e.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">重铬酸钾(<SPAN lang=EN-US>GB 642</SPAN>)标准滴定溶液:<SPAN lang=EN-US>c</SPAN>(<SPAN lang=EN-US>1/6K<SUB>2</SUB>Cr<SUB>2</SUB>O<SUB>7</SUB></SPAN>)<SPAN lang=EN-US>=0.015mol</SPAN>/<SPAN lang=EN-US>L</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">h.</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">二苯胺磺酸钠溶液(同<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.2.1</SPAN></st1:chsdate><SPAN lang=EN-US>.2.f</SPAN>)。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析步骤<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取约<SPAN lang=EN-US>0.2</SPAN>~<SPAN lang=EN-US>0.3g</SPAN>试样,精确至<SPAN lang=EN-US>0.0001g,</SPAN>置于<SPAN lang=EN-US>250mL</SPAN>锥形瓶中,加盐酸溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.2.2</SPAN></st1:chsdate><SPAN lang=EN-US>.2a</SPAN>)<SPAN lang=EN-US>10mL</SPAN>,硫酸溶液(<SPAN lang=EN-US>4.2.2.2b</SPAN>)<SPAN lang=EN-US>10mL</SPAN>和钨酸钠指示液(<SPAN lang=EN-US>4.2.2.2f</SPAN>)<SPAN lang=EN-US>1ml,</SPAN>在不断摇动下,逐滴加入三氯化钛溶液(<SPAN lang=EN-US>4.2.2.2e</SPAN>)直至溶液刚好出现蓝色为止。用水冲洗锥形瓶内壁,并稀释至约<SPAN lang=EN-US>150mL</SPAN>加入<SPAN lang=EN-US>2</SPAN>滴硫酸铜溶液(<SPAN lang=EN-US>4.2.2.2d</SPAN>),充分摇动,待溶液的蓝色消失后,加入磷酸溶液(<SPAN lang=EN-US>4.2.2.2c</SPAN>)<SPAN lang=EN-US>10mL</SPAN>和<SPAN lang=EN-US>2</SPAN>滴二苯胺磺酸钠指示液(<SPAN lang=EN-US>4.2.2.2h</SPAN>),立即用重铬酸钾标准滴定溶液(<SPAN lang=EN-US>4.2.2.2g</SPAN>)滴定至紫色(<SPAN lang=EN-US>30s</SPAN>不褪)即为终点。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析结果的表述<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">以质量百分数表示的全铁含量<SPAN lang=EN-US>X<SUB>2</SUB></SPAN>按式(<SPAN lang=EN-US>2</SPAN>)计算。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">X<SUB>2</SUB>=V·C×0.05585/m×100…………………………………………</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">(<SPAN lang=EN-US>2</SPAN>)<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">式中:<SPAN lang=EN-US>V</SPAN>一一化学计量点时试样所消耗的重铬酸钾标准滴定溶液的体积,<SPAN lang=EN-US>mL</SPAN>,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">c</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一一重铬酸钾标准滴定溶液的浓度,<SPAN lang=EN-US>mol</SPAN>/<SPAN lang=EN-US>L</SPAN>,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">m</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">-一试样的质量,<SPAN lang=EN-US>g</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.05585――</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">与<SPAN lang=EN-US>1.00mL</SPAN>重铬酸钾标准滴定溶液<SPAN lang=EN-US>[c</SPAN>(<SPAN lang=EN-US>1/6K<SUB>2</SUB>Cr<SUB>2</SUB>O<SUB>7</SUB></SPAN>)<SPAN lang=EN-US>=1.000mol</SPAN>/<SPAN lang=EN-US>L</SPAN>)相当的,以克表示的铁的质量。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">所得结果应表示至二位小数。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.2.3</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">允许差<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">取平行动定结果的算术平均值作为测定结果;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">平行测定两结果的绝对差值不大于<SPAN lang=EN-US>0.1</SPAN>%;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">不同实验室测定结果的绝对差值不大于<SPAN lang=EN-US>0.15</SPAN>%。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">还原性物质(以<SPAN lang=EN-US>Fe<SUP>2+</SUP></SPAN>计)含量的测定<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.1</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">方法提要<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">在酸性溶液中用高钙酸钾标准滴定溶液滴定。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">反应方程式为:<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">MnO<SUB>4</SUB><SUP>-</SUP>+5Fe<SUP>2+</SUP>+8H<SUP>+</SUP>=Mn<SUP>2+</SUP>+5Fe<SUP>3+</SUP>+4H<SUB>2</SUB>O<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.2</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试剂和溶液<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">硫酸(<SPAN lang=EN-US>GB 625</SPAN>);<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">磷酸(<SPAN lang=EN-US>GB 1282</SPAN>);<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">高锰酸钾(<SPAN lang=EN-US>GB 643</SPAN>)标准滴定溶液:<SPAN lang=EN-US>c</SPAN>(<SPAN lang=EN-US>1/5KmnO<SUB>4</SUB></SPAN>)<SPAN lang=EN-US>=0.1mol</SPAN>/<SPAN lang=EN-US>L;<o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">高锰酸钾标准滴定溶液:将<SPAN lang=EN-US>4.3.2.3</SPAN>的高锰酸钾标准滴定溶液稀释<SPAN lang=EN-US>10</SPAN>倍,随用随配,当天使用。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.3</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">仪器、设备<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.3</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">微量滴定管,<SPAN lang=EN-US>1mL<o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.4</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析步骤<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取约<SPAN lang=EN-US>5g</SPAN>试样,精确至<SPAN lang=EN-US>0.00lg</SPAN>,置于<SPAN lang=EN-US>250mL</SPAN>锥形瓶中,加水<SPAN lang=EN-US>150mL</SPAN>,加入硫酸(<SPAN lang=EN-US>GB 625</SPAN>)<SPAN lang=EN-US>4ml,</SPAN>磷酸(<SPAN lang=EN-US>GB 1282</SPAN>)<SPAN lang=EN-US>4ml,</SPAN>摇匀。用高锰酸钾标准滴定溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US>.4</SPAN>)滴定至微红色(<SPAN lang=EN-US>30s</SPAN>不褪)即为终点。同时作空白试验。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.5</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析结果的表述<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">以质量百分数表示的还原性物质(以<SPAN lang=EN-US>Fe<SUP>2+</SUP></SPAN>计)含量<SPAN lang=EN-US>X<SUB>3</SUB></SPAN>按式(<SPAN lang=EN-US>3</SPAN>)计算:<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">X<SUB>3</SUB>=(V-V<SUB>0</SUB>)·c×0.05585/m×100……………………………</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">(<SPAN lang=EN-US>3</SPAN>)<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">式中:<SPAN lang=EN-US>V</SPAN>一一化学计量点时试样所消耗的高锰酸钾标准清走溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US>.4</SPAN>)的体积,<SPAN lang=EN-US>ml</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">V<SUB>0</SUB></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一一化学计量点时空白所消耗的高锰酸钾标准滴定溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US>.4</SPAN>)的体积,<SPAN lang=EN-US>ml</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">c-一高锰酸钾标准滴定容液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.3.2</SPAN></st1:chsdate><SPAN lang=EN-US>.4</SPAN>)的浓度,<SPAN lang=EN-US>mol</SPAN>/<SPAN lang=EN-US>L</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">m――</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试样的质量,<SPAN lang=EN-US>g</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.05585――</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">与<SPAN lang=EN-US>1.00mL</SPAN>高锰酸钾标准滴定溶液<SPAN lang=EN-US>[c</SPAN>(<SPAN lang=EN-US>1/5KmnO<SUB>4</SUB></SPAN>)<SPAN lang=EN-US>=1.000mol</SPAN>/<SPAN lang=EN-US>L]</SPAN>相当的,以克表示的铁的质量。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">所得结果应表示至二位小数。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.3.6</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">允许差<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">取平行测定结果的算术平均值作为测定结果;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">平行测定两结果的绝对差值不大于<SPAN lang=EN-US>0.0l</SPAN>%,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">不同实验室测定结果的绝对差值不大于<SPAN lang=EN-US>0.02</SPAN>%。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">盐基度测定<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.1</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">方法提要<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">在试样中加入定量盐酸溶液,再加氟化钾掩蔽铁,然后以氢氧化钠标准滴定溶液滴定。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试剂和溶液<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">盐酸(<SPAN lang=EN-US>GB 622</SPAN>)溶液:<SPAN lang=EN-US>1+3</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">氢氧化钠(<SPAN lang=EN-US>GB 629</SPAN>)溶液:<SPAN lang=EN-US>c</SPAN>(<SPAN lang=EN-US>NaOH</SPAN>):<SPAN lang=EN-US>0.lmol</SPAN>/<SPAN lang=EN-US>L</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">盐酸(<SPAN lang=EN-US>GB 622</SPAN>)溶液:<SPAN lang=EN-US>c</SPAN>(<SPAN lang=EN-US>HCl</SPAN>)<SPAN lang=EN-US>=0.lmol</SPAN>/<SPAN lang=EN-US>L</SPAN>溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">氟化钾(<SPAN lang=EN-US>GB 1271</SPAN>):<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="500" UnitName="g"><SPAN lang=EN-US>500g</SPAN></st1:chmetcnv>/<SPAN lang=EN-US>L</SPAN>溶液。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取<SPAN lang=EN-US>500g</SPAN>氟化钾,以<SPAN lang=EN-US>200mL</SPAN>不含二氧化碳的蒸馏水溶解后,稀释到<SPAN lang=EN-US>1000mL</SPAN>,加入<SPAN lang=EN-US>2mL</SPAN>酚酞指示剂并用氢氧化钠溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US>.2</SPAN>)或盐酸溶液(<SPAN lang=EN-US>4.4.2.1</SPAN>)调节溶液至呈微红色,滤去不溶物后贮存于塑料瓶中。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.5</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">氢氧化钠<SPAN lang=EN-US>(GB 629</SPAN>);<SPAN lang=EN-US>c(NaOH</SPAN>)<SPAN lang=EN-US>=0.lmol</SPAN>/<SPAN lang=EN-US>L</SPAN>标准滴定溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.6</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">酚酞(<SPAN lang=EN-US>GB 10729</SPAN>):<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="10" UnitName="g"><SPAN lang=EN-US>10g</SPAN></st1:chmetcnv>/<SPAN lang=EN-US>L</SPAN>乙醇溶液。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.3</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析步骤<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取约<SPAN lang=EN-US>1.5g</SPAN>试样,精确至<SPAN lang=EN-US>0.001g</SPAN>,置于<SPAN lang=EN-US>250mL</SPAN>锥形瓶中,用移液管准确加入<SPAN lang=EN-US>25.00mL</SPAN>盐酸溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.4.2</SPAN></st1:chsdate><SPAN lang=EN-US>.3</SPAN>),加<SPAN lang=EN-US>20mL</SPAN>煮沸后冷却的蒸馏水,摇匀,盖上表面皿。在室温下放置<SPAN lang=EN-US>10min</SPAN>,再加入氟化钾溶液(<SPAN lang=EN-US>4.4.2.4</SPAN>)<SPAN lang=EN-US>10mL</SPAN>,摇匀,加<SPAN lang=EN-US>5</SPAN>滴酚酞指示剂(<SPAN lang=EN-US>4.4.2.6</SPAN>),立即用氢氧化钠标准滴定溶液(<SPAN lang=EN-US>4.4.2.5</SPAN>)滴定至淡红色(<SPAN lang=EN-US>30s</SPAN>不褪)为终点。同时用煮沸后冷却的蒸馏水代替试样作空白试验。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.4</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">分析结果的表述<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">以质量百分数表示的盐基度<SPAN lang=EN-US>X<SUB>5</SUB></SPAN>按式(<SPAN lang=EN-US>4</SPAN>)计算:<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">X<SUB>5</SUB>=(V<SUB>0</SUB>-V)·c×0.0170/17.0/(m·X<SUB>4</SUB>/18.62)×100<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">=(V<SUB>0</SUB>-V)·c×0.01862/(m·X<SUB>4</SUB>)×100………………………</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">(<SPAN lang=EN-US>4</SPAN>)<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">式中:<SPAN lang=EN-US>V<SUB>0</SUB></SPAN>一一化学计量点时空白试验所消耗的氢氧化钠标准滴定溶液的体积,<SPAN lang=EN-US>ml</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">V</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一一化学计量点时试样所消耗的氢氧化钠标准滴定溶液的体积,<SPAN lang=EN-US>mL</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">c</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">--氢氧化钠标准滴定溶液的浓度。<SPAN lang=EN-US>mol</SPAN>/<SPAN lang=EN-US>L</SPAN>,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">m</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一一试样的质量,<SPAN lang=EN-US>g</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">X<SUB>4</SUB></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">-一试样中三价铁的质量百分数,<SPAN lang=EN-US>X<SUB>4</SUB>=X<SUB>1</SUB>-X<SUB>3</SUB></SPAN>或<SPAN lang=EN-US>X<SUB>4</SUB>=X<SUB>2</SUB>-X<SUB>3</SUB></SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">0.0170</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一-与<SPAN lang=EN-US>1.00mL</SPAN>氢氧化钠标准滴定溶液<SPAN lang=EN-US>[c</SPAN>(<SPAN lang=EN-US>NaOH</SPAN>)<SPAN lang=EN-US>=1.000mL</SPAN>/<SPAN lang=EN-US>L</SPAN>)相当的,以克表示的羟基(<SPAN lang=EN-US>OH<SUP>-</SUP></SPAN>)的质量。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">18.62</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">一-铁(<SPAN lang=EN-US>1/3Fe</SPAN>)的摩尔质量,<SPAN lang=EN-US>g</SPAN>/<SPAN lang=EN-US>mo1</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">所得结果应表示至二位小数。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.4.5</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">允许差<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">取平行测定结果的算术平均值作为测定结果;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">平行测定两结果的绝对差值不大于<SPAN lang=EN-US>0.2</SPAN>%,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">不同实验室测定结果的绝对差值不大于<SPAN lang=EN-US>0.5</SPAN>%。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5 pH</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">值的测定<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.1</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试剂和溶液<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.1</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1 pH=4.00</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">的 邻苯二甲酸氢钾 <SPAN lang=EN-US>pH</SPAN>值标准溶液;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.1</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2 pH=6.86</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">的磷酸二氢钾<SPAN lang=EN-US>-</SPAN>邻苯二甲酸氢钾<SPAN lang=EN-US>pH</SPAN>值标准溶液。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.2</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">仪器、设备<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">酸度计:精度<SPAN lang=EN-US>0.1pH</SPAN>;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">玻璃电极;<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.2</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">饱和甘汞电极。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.3</SPAN></st1:chsdate><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">测定步骤<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.3</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">试样溶液的制备<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">称取<SPAN lang=EN-US>1.0g</SPAN>试样置于烧杯中,用水稀释,全部转移到<SPAN lang=EN-US>100mL</SPAN>容量瓶中稀释到刻度,摇匀。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">4.5.3</SPAN></st1:chsdate><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">.2 </SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">测定<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">用<SPAN lang=EN-US>pH=4.00</SPAN>、<SPAN lang=EN-US>pH=6.86</SPAN>的缓冲溶液定位后,将试样溶液(<st1:chsdate w:st="on" IsROCDate="False" IsLunarDate="False" Day="30" Month="12" Year="1899"><SPAN lang=EN-US>4.5.3</SPAN></st1:chsdate><SPAN lang=EN-US>.1</SPAN>)倒入烧杯,将饱和甘汞电极和玻璃电极浸入被测溶液中,至<SPAN lang=EN-US>pH</SPAN>值稳定时<SPAN lang=EN-US>[lmin</SPAN>内<SPAN lang=EN-US>pH</SPAN>值的变化不大于<SPAN lang=EN-US>0.1]</SPAN>读数。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5</SPAN></B><A name=t6></A><B><SPAN style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</SPAN></B><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">检验规则</SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">聚合硫酸铁应由生产厂的质量检验部门按照本标准规定的试验方法和检验规则对产品质量进行检验,生产厂应保证所有出厂的产品都符合本标准的要求,<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">每批出厂的产品都应附有质量说明书,内容包括:生产厂名称、产品名称、等级、批号、生产日期、净重、产品质量符合本标准的证明书及本标准编号。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">使用单位有权按照本标准的规定对所收到的产品进行质量检验,核实其质量是否符合本标准的要求。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">每一贮罐为一批,每批不少于<SPAN lang=EN-US>10t</SPAN>。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.5</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">取样时,用玻璃管或塑料管插入贮罐中<SPAN lang=EN-US>2</SPAN>/<SPAN lang=EN-US>3</SPAN>处取出样品。取出的样品不少于<SPAN lang=EN-US>500mL</SPAN>,分别装入两个清洁、干燥的瓶中,密封瓶口,并在瓶上贴标签,注明生产厂名称、产品名称、产品批号、采样日期,一瓶由质量检验部门检验,另一瓶作为保留样品,以备查验,保留期六个月。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.6</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">如果检验结果中有一项不符合本标准要求时,应加倍抽取样品重新检验,检验结果有一项不符合本标准要求时,整批产品拒收。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">5.7</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">当供需双方因产品质量发生异议时,可按照《全国产品质量仲裁检验暂行办法》的规定办理。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6</SPAN></B><A name=t7></A><B><SPAN style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</SPAN></B><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">标志、包装、运输、贮存</SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6.1</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">聚合硫酸铁用玻璃钢槽车或内衬塑料桶的铁桶包装。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6.2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">包装上应附有产品合格证书,其内容包括:产品名称、生产厂名称、指标、批号、净重、生产日期及本标准编号。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6.3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">聚合硫酸铁具有腐蚀性,包装容器上应涂刷<SPAN lang=EN-US>GB 190</SPAN>中规定的腐蚀性物品标志以及<SPAN lang=EN-US>GB <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="19" UnitName="l">19l</st1:chmetcnv></SPAN>中规定的向上、怕热标志。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">6.4</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">贮存时不要曝晒,贮存温度不低于<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="True" HasSpace="False" SourceValue="20" UnitName="℃"><SPAN lang=EN-US>-20℃</SPAN></st1:chmetcnv>,有效贮存期半年。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><B><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">7</SPAN></B><A name=t8></A><B><SPAN style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">、</SPAN></B><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">安全要求</SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">聚合硫酸铁产品具有一定的腐蚀性和刺激性,操作人员在进行作业时,应戴防护用具以避免身体直接接触。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"> <SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" align=left><A name=t9></A><B><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">附加说明<SPAN lang=EN-US>:</SPAN></SPAN></B><B><SPAN lang=EN-US style="FONT-SIZE: 18pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">本标准由中华人民共和国化学工业部科技司提出。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">本标准由化学工业部天津化工研究院技术归口。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">本标准由化学工业部天津化工研究院和杭州硫酸厂负责起草。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">本标准主要起草人邵维仁、戴思严、朱传俊、单琪、赵继铭<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P></TD></TR></TBODY></TABLE></DIV> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT face="Times New Roman" size=5> </FONT></o:p></SPAN></P><SPAN lang=EN-US style="FONT-SIZE: 16pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><BR style="PAGE-BREAK-BEFORE: always; mso-special-character: line-break" clear=all></SPAN>
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影响水位变化因素很多?
平时运行时影响水位变化因素很多最主要看那些、从哪些参数上来判断。
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GB 50273-2009 锅炉安装工程施工及验收规范?
这个论坛里好像没有,我找到了一个征求意见稿,先发出来大家看看。
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GB-T 70.1-2008 内六角圆柱头螺钉 表1中阴影部分是否表 ...?
GB-T 70.1-2008 内六角圆柱头螺钉 表1中阴影部分是否表示全螺纹?! 标准里讲,阴影部分长度,螺纹制到距头部3P以内。 哪位指导下! 谢谢!!
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低温甲醇洗再沸器置换方案?
原始开车时,低温 甲醇 洗系统置换中, 再沸器 用什么介质置换?
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耐酸软连接?
请问 国内有没有生产耐酸耐高温(300度)的软连接的厂家啊
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SHORTCUT计算最小回流比,算下来结果居然是-1 是怎么回 ...?
SHORTCUT计算最小回流比,算下来结果居然是-1 Shortcut Column 'SCD1' <PRE> FEEDS STREAM PHASE ------------ ------ S1 LIQUID PRODUCTS ------------- TOTAL STREAM RATES ------------- MOLES WEIGHT LIQUID VOL NORM VAPOR(1) NUM STREAM + PHASE KG-MOL/HR KG/HR M3/HR M3/HR SECTION TRAYS ------------ - ---------- ---------- ---------- ---------- ------- ----- S2 L 421.58 17917.34 20.23 9449.28 1 5.40 S3 L 47.50 4191.26 3.91 1064.71 TOTALS 469.08 22108.60 24.15 10513.99 5.40 SPECIFICATIONS PARAMETER COMP. SPECIFICATION SPECIFIED CALCULATED TYPE NUM TYPE VALUE VALUE ----------------- ------- ------------- ---------- ---------- STRM S2 2 MOL FRACTION 8.200E-01 8.198E-01 STRM S3 1 MOL FRACTION 9.700E-01 9.682E-01 SUMMARY OF UNDERWOOD CALCULATIONS MINIMUM REFLUX RATIO -1.00000 FEED CONDITION Q 1.29360 FENSKE MINIMUM TRAYS 5.40407 OPERATING REFLUX RATIO 2.00 * R-MINIMUM </PRE>
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职业健康安全问答(2.26)?
通过人体的室颤电流约为 mA 。 A 、30 B、40 C、50 D、 100
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空分行业如何应对煤化工的崛起?
这个是转帖,各位高手请勿拍砖!
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如何利用aspen软件进行用能分析-火用以及火用损?
如题,除了简单的能量横算,如要进行能量的质量分析, 例如有效能(火用)及有效能损失的计算,是否可以借助ASPEN等软件实现呢? 有高手做过这方面的工作吗? 已知在aspen plus中可以通过添加物性来计算火用,但它是由 h-T 0 S 计算所的,我们通常的计算式是 Δ h-T 0 ΔS 那么aspen计算的这个火用值,是不是就不能直接用来分析了? 有效能损失又该从何获得呢?
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求松香的工艺设计!!!!?
{:soso_e150:}
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铅锌冶炼烟化炉铁渣怎么处理?
通常都是卖给水泥厂的,结果水泥厂嫌含铁量太高(约35~40%)。 用来制FeCl3还要买 盐酸 。焙烧后再磁选,不方便。电炉感觉铁含量太低了。 有什么好办法没有,回收或者外卖?请教有经验的人士。
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请问一化学物质的中文名称?
< >1,6-dihydroxy-2,5-dioxahexane </P> < >不知道 中文名称 ,以及CAS 号码。望得到帮助。</P>
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请问caesar分析的时候考虑了管的径向变形吗?能分析径向 ...?
请问caesar分析的时候考虑了管的径向变形吗?能分析径向变形吗?
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煤气化碳转化率?
本人初学aspen,煤气化和燃烧,碳转化率在哪里确定?
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HYSYs文件打不开?
HYSYs文件打不开.一个用户给的hysys文件打不开,提示"文件名 is not internally marked as the type of file you are looking for .Try a file with a different extension",不知是什么意思.公司的文件都是加密的外面的机子打不开,不然放在网上.多谢.
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中高合金铬钼钢及不锈钢根部氧化在底片上的显示图像及成 ...?
本人在多年的射线底片中发现T91/P91及T92/P92钢,及 不锈钢 有根部局部氧化现象,形成的铬合物呈白色(形状酷似冬天里窗花),造成合金成分烧损严重,白色影像是否由于铬合物密度增大造成。请各位大侠积极讨论其成因及造成的影响。
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如何通过化工装置的生产数据来反推ASPEN中的NRTL的二元 ...?
乙腈 抽提C4法生产丁二烯装置,用ASPEN进行模拟优化,NRTL中缺少二元交互参数,请问能不能通过装置的现有数据如灵敏板温度压力、塔顶/底质量进行反推?
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求助 碘苯怎么除?
做一个有机合成, 碘苯 过量,最后的产品在碘苯中的溶解度很大,试过很多溶剂都顶不出来,直接蒸馏温度太高,有没有什么好的办法除掉碘苯? 水蒸气蒸馏可以吗?
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安全生产会议管理制度?
安全生产会议管理制度 1.目的 为了及时传达上级的有关安全的指示精神,及时解决生产中存在的安全隐患,不断提高全体员工的安全意识和安全管理水平,特制定本制度。 2.适用范围 本制度适用于有限公司 3.职责 3.1 安全生产办公室负责定期组织召开安全生产专题会议并会议内容进行记录整理; 3.2 车间/部门负责参与安全生产专题会议并执行会议决议。 4.工作内容 4.1 安全生产办公室每月不定期的组织召开安全生产专题会议,在会议上传达最新的上级有关安全生产的指示精神及最新的国家、行业的有关安全生产的法律法规或标准。 4.2 通报有关安全检查的内容和检查结果。 4.3 提出安全隐患整改意见。 4.4 对安全目标完成情况进行总结,并提出下一步的安全生产工作计划。
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简介
职业:寰球工程项目管理(北京)有限公司 - 电气/仪表工程师
学校:武汉生物工程学院 - 应用化学系
地区:广东省
个人简介:
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