有几句看不懂。? 用菲绕林法测定痕量铁 第一句:appropriate sample preparation has rendered the iron and sample matrix soluble in water or other suitable solvent,这里的matrix何解? 第二句: aldehydes, ketones, and oxidizing agents interfere by consuming the hydroxylamine hydrochloride added as a reducing agent. 这里的oxidizing agents何解? 另外,这标准有中文版的吗?查看更多