催化动力学分光光度法测定水样中的痕量铜  

DETERMINATION OF ULTRATRACE AMOUNTS OF COPPER(ll) BY LTS CATALYTIC EFFECT ON THE OXIDATIVE COUPLING REACTION

作　　者：倪永年[1] 刘秋香[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《南昌大学学报（理科版）》2005年第6期511-513,共3页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(20365002和20562009);江西省自然科学基金资助项目(0320014);中国科学院长春应用化学研究所电分析化学重点实验室项目(SKLEAC2004-3)

摘　　要：在pH值为7.6的磷酸二氢钾-硼砂缓冲介质中,痕量铜(Ⅱ)可灵敏地催化H2O2氧化N,N-二甲基苯胺(DMA)与3-甲基-2-苯并噻唑-酮腙(MBTH)的氧化还原显色反应.研究了该反应的最佳条件,建立了催化动力学分光光度法测定痕量铜的新方法.该方法的线性范围为(1.5～7.7) μg/L,检出限为0.463 0 μg/L.该法被用于测定水样中铜的含量,获得满意结果.A spectrophotometric method was developed for the determination of ultratrace amounts of copper （Ⅱ） based on its catalytic effect on the oxidative coupling reaction of 3 - methyl - benzothiazolinone hydrozone with N, N - Dimethylaniline to produce an intensely colourd dye （ （ max = 590 nm） in the presence of hydrogen peroxide. In this reaction, 1,10 - Phenanthroline acted as an effective activator for the catalysis of copper（Ⅱ）. By measuring the absorbance of the dye, copper（Ⅱ） can be determined at the （ 1.5 - 7.7 ） μg/L level. The detection limit was 0.46 μg/L. The proposed method was successfully applied to the determination of copper（Ⅱ） in some water samples.

关 键 词：催化动力学 分光光度法 铜 

分 类 号：O657.32[理学—分析化学]