简易电解池-改换介质-阳极溶出伏安法  

Medium Exchange in a Special Electrolyzer for Simultaneous Determination of Copper and Antimony by Anodic Stripping Voltammetry

作　　者：邵勇[1] 王曙[1] 杨强 张淑云[1] 

机构地区：[1]四川轻化工学院化学工程系,自贡643033

出　　处：《分析化学》1997年第7期780-783,共4页Chinese Journal of Analytical Chemistry

基　　金：四川省教委科研基金资助课题

摘　　要：采用自制的简易电解池，以圆盘旋转玻碳电极为工作电极，用于阳极溶出伏安法改换溶出介质的可行性研究。以同时测定Ｃｕ（Ⅱ），Ｓｂ（Ⅲ）为例，试验了改换溶出介质的条件。结果表明，改换介质可消除共存离子的干扰，只要选择合适的溶出介质，可有效地提高测定方法的分辨率和灵敏度。此方法用于矿样中铜和锑的同时测定，结果满意。The feasibility of medium exchange in a self-made electrolyzer has been studiedfor anodic stripping voltammetry. This electrolyzer prevents the electrodeposited metal atglass carbon electrode from oxidation by air when the medium is changed. It is demonstratedthat the change of medium can separate over1apping peaks, remove interferences of otherpresent ions and get high sensitivity. In the electrolyte of 0. 1 mdl/L HCl, the peak height islinear with the concentration of copper(Ⅱ) in the range of 2-200 μg/L and antimony(Ⅲ) inthe range of 5-320 μg／L when 0. l mol/L KSCN added 0. 04 mol/L HCl is used for strip-ping medium. Effects of common ions have been tested. This method has been successfullyapplied to the simultaneous determination of copper(Ⅱ) and antimony (Ⅲ) in a standardmineral sample without prior separation.

关 键 词：阳极溶出伏安法 铜 锑 ASV 

分 类 号：O657.14[理学—分析化学] O614.121[理学—化学]