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近二十年来,曾提出了一些铜的高选择性和灵敏的显色剂,例如2,2’—联喹啉,铜试剂(二乙基二硫代氨基甲酸盐),新铜试剂(2,9—二甲基—1,10—邻二杂氮菲),α—联糠酰肟,双硫腙和双环己酮乙二酰二腙等,其中新铜试剂因具有很高的选择性而广泛应用。本文研究了铜—新铜试剂—甲基橙三元给合物的适宜萃取条件、共存组份的干扰以及络合物的组成比,并拟定了萃取光度法测定纯硒、纯铋中微量铜的方法。
In the past two decades, some highly selective and sensitive copper developers have been proposed, such as 2,2’-biquinoline, copper reagent (diethyldithiocarbamate), new copper reagent ( 2,9-dimethyl-1,10-o-phenanthroline), α-bismuthuril oxime, dithizone and dicyclohexanone oxydizone, among which, the new copper reagent has a very high selection Sex and widely used. In this paper, the suitable extraction conditions of copper-new copper reagent-methyl orange ternary complex, the interference of coexisting components and the composition ratio of complex were studied, and the extraction spectrophotometry was developed for the determination of trace amounts of copper in pure selenium and pure bismuth Methods.