褪色分光光度法测定痕量铜

Study on Determination of Copper by Decoloring Spectrophotometry with Potassium Permanganate Oxidating DA PEM

根据Ｃｕ２＋对高锰酸钾氧化二安替比林对乙氧基苯基甲烷（ＤＡＰＥＭ）显色的干扰褪色作用，建立了一个测定铜的新方法．铜离子含量在１０－８０μｇ／Ｌ内与１ｇ（Ａ０／Ａ）成良好的线性．体系选择性和稳定性良好．用于铅样中痕量铜的测定，结果满意．

According to decoloring reaction of cu 2+ with Mn(VII)-Da PEM color system,a new method of determination of Cu 2+ is founded.In the range of 10-80μg/L of Cu 2+ ,a good linear relationship exist between the concentration of Cu 2+ and lg(A 0/A).This method has been applied to the determination of Cu 2+ in Iead samples and the result are satisfatory.