Determination of mercury by intermittent flow electrochemical cold vapor generation coupled to atomic fluorescence spectrometry

被引：59

作者：

Li, Xun

Wang, Zhenghao ^{[1
]}

机构：

[1] Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China

[2] Gannan Normal Univ, Dept Chem & Life Sci, Ganzhou 341000, Peoples R China

来源：

ANALYTICA CHIMICA ACTA | 2007年 / 588卷 / 02期

基金：

中国国家自然科学基金;

关键词：

electrochemical cold vapor generation; atomic fluorescence spectrometry; intermittent flow; mercury;

D O I：

10.1016/j.aca.2007.02.003

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel method for determination of mercury was developed using an intermittent flow electrochemical cold vapor generation coupled to atomic fluorescence spectrometry (IF-ECVG-AFS). The mercury vapor was generated on the surface of glassy carbon cathode in the flow cell. The operating conditions for the electrochemical generation of mercury vapor were investigated in detail, and the interferences from various ions were evaluated. Urder the optimized conditions, no evident memory effects of mercury were observed. The calibration curve was linear up to 5 mu g L-1 -Ig at 0.54A cm(-2). A detection limit of 1.2 ng L-1 Hg and a relative standard deviation of 1.8% for 1 mu gL(-1) Hg were obtained. The accuracy A method was verified by the determination of mercury in the certified reference human hair. The ECVG avoided the use of reductants, thereby greatly reducing the contamination sources. In addition, the manifold of IF-ECVG-AFS was simple and amenable to automation. (c) 2007 Elsevier B. V. All rights reserved.

引用

页码：179 / 183

页数：5