分析测试学报2001，Vol.20Issue(2)：13-16,4.
测定人发中铜的桑色素修饰碳糊电极吸附溶出伏安法
Determination of Copper in Human Hair by Adsorptive Stripping Voltammetry with Morin _ modified Carbon Paste Electrode
摘要
Abstract
A new chemically modified carbon paste electrode was prepared by using morin as a modifier.An adsorptive anodic stripping voltammetry was developed for the sensitive and selective determination of copper(Ⅱ ) at the electrode.An electroactive complex of copper(Ⅱ ) with morin was formed and accumulated on the surface of the electrode in a stirred formate buffer solution.After it was reduced at － 0.45 V for 30 s without stirring,the voltammogram was then recorded by applying an anodizing scan from － 0.45 V to 0.55 V at 250 mV· s－ 1 ,and the second derivative peak was obtained at － 0.05 V.Under optimized conditions,linear relationship between the second derivative peak current and copper concentration was obtained in the ranges of 2.0× 10－ 8～ 9.0× 10－ 7 mol/L Cu(Ⅱ ) with 2 min of preconcentration and 1.0× 10－ 9～ 6.0× 10－ 8 mol/L Cu(Ⅱ )with 4 min of accumulation.The detection limit was found to be 4.0× 10－ 10 mol/L(S/N=3) with 4 min accumulation.The developed method was satisfactorily applied to copper(Ⅱ ) determination in human hair samples.关键词
桑色素/化学修饰碳糊电极/吸附溶出伏安法/铜/人发分类
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费俊杰,黎拒难,易兵,易芬云..测定人发中铜的桑色素修饰碳糊电极吸附溶出伏安法[J].分析测试学报,2001,20(2):13-16,4.
