甲醇分析的主要作用? 呵呵。甲醇标准有很多的，关键在于不同用途，采用标准不同。 国内标准和国外标准也是有区别的。如美国美国astm标准的aa级甲醇，国内的gb 338-2004 工业用甲醇标准等 国内的gb 338-2004 工业用甲醇标准可以去下面下载： http://222.173.194.17/foodstanda ... 1751_gb338-2004.rar aa级甲醇的杂质含量可参考如下内容： methanol product specification -------------------------------------------------------------------------------- our methanol product specification conform to grade aa methanol and impca specifiation. the typical analysis as per certificate of quality are as follow: no items analysis method analytical result 01. acetone & aldehyde, % wt astm e346-94 less than 0.004 02. acetone, % wt astm e346-94 less than 0.003 03. acidity as acetic acid, % wt astm d1614-95 less than 0.003 04. alkalinity as nh3, % wt astm d1613-97 nil 05. appearance impca 003-98 clear, free from suspended matter 06. carbonizable, pt-co scale astm e346-94 less than no. 30 07. chloride, ppm impca 002-98 less than 0.1 08. color, pt-co scale astm d1209-97 less than no. 5 09. distilation range astm d1078-95 ibp 64.5°c, range 1.0°c 10. ethanol content, % wt astm e346-94 less than 0.001 11. water miscibility astm d1722-94 pass test 12. nonvolatile content, % wt astm d1363-97 less than 0.001 13. odor astm d1296-93 characteristic, free of foreign odor 14. purity, % wt impca 001-98 more than 99.9% 15. permanganate time, minute astm d1363-97 more than 60 16. specific gravity, 20/20 °c astm d4052-96 0.7926 17. water content, % wt astm e1064-92 less than 0.1 18. iron, ppb-wt astm e394-94 less than 50 19. tma, ppb-vol kmi/jis less than 50 一些国内甲醇标准可以看一下这个帖子： https:///viewthread.php?tid=107116 [ ]查看更多
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