On-line preconcentration of lead and cadmium for flame atomic absorption spectrometry using a flow-through electrochemical microcell

被引：36

作者：

Bulska, E ^{[1
]}

Walcerz, M ^{[1
]}

Jedral, W ^{[1
]}

Hulanicki, A ^{[1
]}

机构：

[1] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland

来源：

ANALYTICA CHIMICA ACTA | 1997年 / 357卷 / 1-2期

关键词：

cadmium; lead; FAAS; electrochemical preconcentration;

D O I：

10.1016/S0003-2670(97)00537-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method was developed for the trace determination of lead and cadmium by flame atomic absorption spectrometry (FAAS) with electrochemical preconcentration. Both metals were deposited on the glassy-carbon electrode in a flow-through microcell of volume 3 mu l. At a consumption of a 3 mu I sample volume, the procedure resulted in an enhancement factor of more than 20 and yielded a detection limit of 1 mu g l(-1) for Pb and 0.08 mu g l(-1) for Cd. The relative standard deviation (n=12) was 2.1% at the 100 mu g l(-1) level for Pb and 3.2% at the 8 mu g l(-1) level for Cd. Results obtained for the standard reference material, water SRM 1643c, were in good agreement with the certified values. (C) 1997 Elsevier Science B.V.

引用

页码：133 / 140

页数：8