APPLICATION OF CATALYTIC ADSORPTIVE STRIPPING VOLTAMMETRY OF THE COBALT-ALPHA-BENZIL DIOXIME COMPLEX TO ANALYSIS OF COBALT TRACES IN METALLIC ZINC

被引：12

作者：

BOBROWSKI, A

机构：

[1] Department of Analytical Chemistry, University of Mining and Metallurgy

来源：

TALANTA | 1994年 / 41卷 / 05期

关键词：

D O I：

10.1016/0039-9140(93)E0009-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The catalytic adsorptive stripping voltammetric method with alpha-benzil dioxime and nitrite affords numerous advantages in cobalt determination. The detailed conditions of the determination of the cobalt traces in metallic zinc by catalytic adsorptive stripping voltammetry have been investigated. Both the linear sweep and the differential pulse stripping modes can be used with similar sensitivity. Possible interferences by Mn, Pb, Cu, Ni and Fe are evaluated. In the presence of 5 x 10(5) fold excess of Zn the linear dependence of the cobalt CASV peak current on concentration ranged from 0.05 mug/l to 3 mug/l. Optimal conditions include the accumulation potential of -0.65 V and the accumulation time of 10 sec. The results of the determination of 10(-5)% level of Co in the metallic zinc showed good reproducibility (relative standard deviation, RSD = 0.07) and reliability.

引用

页码：725 / 729

页数：5

共 13 条

[1] DETERMINATION OF COBALT BY ADSORPTIVE STRIPPING VOLTAMMETRY USING COBALT(II)-NIOXIME-NITRITE CATALYTIC-SYSTEM [J].