Determination of Lead and Cadmium in Sea- and Freshwater by Anodic Stripping Voltammetry with a Vibrating Bismuth Electrode

被引：61

作者：

Bi, Zhaoshun ^{[1
]}

Chapman, Conrad S.

Salauen, Pascal ^{[1
]}

van den Berg, Constant M. G. ^{[1
]}

机构：

[1] Univ Liverpool, Dept Earth & Ocean Sci, Liverpool L69 3GP, Merseyside, England

来源：

ELECTROANALYSIS | 2010年 / 22卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

Lead; Cadmium; Anodic stripping voltammetry; Natural waters; Bismuth electrode; CARBON-FILM ELECTRODES; BULK ELECTRODE; MERCURY-FILM; HEAVY-METALS; TRACE-METALS; COPPER; SPECIATION; SEAWATER; SAMPLES; POWDER;

D O I：

10.1002/elan.201000429

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A solid, bismuth (Bi), disk, electrode is used to determine lead (Pb) in natural waters including seawater. The diffusion layer thickness was lowered from 93 to 29 mu m by stirring, and to 18 mu m by using the vibrated version of the Bi electrode. The Bi electrode does not require removal of dissolved oxygen, which facilitates in situ detection. The electrode was tested for the determination of Pb in coastal seawater samples. The detection limit for Pb was 0.15 nM in acetate buffer and 0.5 nM in seawater using a 2 min deposition time. Cadmium can be determined together with Pb but the sensitivity is about 10 x lower. The Bi electrode compares unfavourably to a mercury electrode in terms of sensitivity.

引用

页码：2897 / 2907

页数：11

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