二安替比林间乙氧基苯基甲烷褪色法测定微量铜的研究

Determination of Trace Copper by Fadeophotometry Using Diantipyryl m-Ethylphenyl Methane

基于Ｃｕ２＋对Ｈ３ＰＯ４－Ｍｎ（Ⅱ）—Ｔｗｅｅｎ２０—ＤＡｍＥＭ—Ｖ（Ｖ）显色体系干扰褪色作用，建立了一个测定微量铜的新方法。其检出限为４×１０－５ｇ·Ｌ－１，铜离子含量在４０～２００μｇ·Ｌ－１范围内与ｌｇ（Ａｏ／Ａ）成良好线性关系，体系稳定性和选择性良好。用于铅样中痕量铜的测定，结果满意。

A new means to determine the trace copper is developed onthe basis of the fadeness effect of Cu2+ on H3PO4-Mn(Ⅱ)-Tweenzo-DAmEM-V(Ⅴ).Detection limit is 4×10-5 g·l-1,good staility,selectivity and linear relation is available in the Cu2+ concentration range of 40￣200 g·l-1.Satisfactory result has been obtained in the analysis of trace copper in lead sample.