Cu(Ⅱ)-DApCM-V(Ⅴ)体系阻抑光度法测定微量铜

Determination of Micro Amounts of Copper(Ⅱ) with Inhibitory Kinetic Spectrometry

在磷酸介质中，Ｃｕ（Ⅱ）能抑制二安替比林对氯苯基甲烷（ＤＡｐＣＭ）与钒（Ⅴ）的显色反应。研究了反应条件和动力学参数，建立了测定微量铜（Ⅱ）的新方法。其线性范围的质量浓度为０．０４～０．１８ｍｇ／Ｌ，检出限为０．０４ｍｇ／Ｌ。用于粗铅和铝合金样品中铜的测定，结果满意。

An inhibitory spectrophotometric method for the determination of micro amounts of copper(Ⅱ) has been established.It is based on the inhibitory effect of copper(Ⅱ) on the color reaction of vanadium(Ⅴ) with diantipyryl 4 chlorophenyl methane(DApCM) in phosphoric acid solution.The kinetic condition and parameters of the reaction were studied in detail.The range of determination is 0.04～0 18mg Cu(Ⅱ)/L,and the limit of detection is 0.04mg Cu(Ⅱ)/L.The method has been applied to the determination of micro amounts of copper(Ⅱ) in samples with satisfacotry results