On the suppression of zinc-copper interactions in square wave anodic stripping voltammetry in flowing solution by addition of gallium ions

被引：29

作者：

Brett, CMA ^{[1
]}

Garcia, MBQ ^{[1
]}

Lima, JLFC ^{[1
]}

机构：

[1] UNIV PORTO, FAC FARM, DEPT QUIM FIS, CEQUP, P-4050 OPORTO, PORTUGAL

来源：

ANALYTICA CHIMICA ACTA | 1997年 / 339卷 / 1-2期

关键词：

anodic stripping voltammetry; wall-jet electrode; square wave voltammetry; copper; zinc; gallium; trace metals;

D O I：

10.1016/S0003-2670(96)00459-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The problems arising from the formation of copper-zinc intermetallic compounds in square wave anodic stripping voltammetry at wall-jet mercury thin-film electrodes in continuous flow systems have been investigated. These effects are reduced to zero by spiking the analyte solution with gallium ions and ensuring a sufficiently low value of pH, either by using acetate buffer or acidifying the generally-used sodium perchlorate electrolyte. Advantages of this approach are assessed, as are the benefits of stopping solution flow during the determination step of each experiment.

引用

页码：167 / 172

页数：6

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