DETERMINATION OF COBALT BY ADSORPTIVE STRIPPING VOLTAMMETRY USING COBALT(II)-NIOXIME-NITRITE CATALYTIC-SYSTEM

被引：55

作者：

BOBROWSKI, A

机构：

[1] Academy Of Mining And Metalurgy, Institute Of Material Science

来源：

ANALYTICAL LETTERS | 1990年 / 23卷 / 08期

关键词：

catalytic reaction; cobalt; differential pulse adsorptive stripping voltammetry; dimethylglyoxime; natural waters; nickel; nioxime; nitrite; zinc;

D O I：

10.1080/00032719008052503

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A differential pulse adsorptive voltammetric method for the cobalt determination with detection limit of 1.2x10- 10 M (100 sec preconcentration) is proposed. The preconcentration of Co(ll)-nioxime complex during the adsorption step and utilization of catalytic effect during the reduction of Co(II)-nioxime complex provides a great enhancement of cobalt voltammetric response. The ammonia buffer solution containing nioxime and nitrite is suitable for the adsorptive voltammetric determination of nanomolar cobalt concentrations in the presence of 1000-fold excess of nickel and 10 000-fold excess of zinc_. © 1990, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：1487 / 1503

页数：17

共 35 条

[11] DETERMINATION OF COBALT IN THE PRESENCE OF NICKEL AND OTHER METALS BY DIFFERENTIAL PULSE POLAROGRAPHY IN SOLUTIONS CONTAINING DIMETHYLGLYOXIME AND CITRATE [J].