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用各种高分子胺进行铬(Ⅵ)的萃取已有许多报道,但对三正辛胺(TOA)萃取分离铬(Ⅵ)的条件,特别是其萃合物的组成的研究却很少,且结论各异本文在此基础上研究了TOA萃取分离、二苯偕肼显色光度测定微量铬(Ⅵ)的适宜条件及TOA与铬(Ⅵ)萃合物的组成,提出了一个干扰离子少,重现性好,准确度高,操作简便的测定矿石及钢铁中微量铬(Ⅵ)的分析方法。
There have been many reports on the extraction of chromium (VI) with various polymeric amines. However, there are few studies on the conditions for the extraction and separation of chromium (Ⅵ) by TOA, especially the composition of its extracts. And the conclusion is different on the basis of this study TOA extraction and separation, benzidine hydrazine color spectrophotometric determination of trace chromium (VI) of the appropriate conditions and the composition of TOA and chromium (Ⅵ) extract proposed a less interference ions , Good reproducibility, high accuracy, simple and convenient method for the determination of trace chromium (Ⅵ) in ores and steel.