A low-cost flame atomic absorption spectrometry method for determination of trace metals in aqueous samples

被引：50

作者：

Carasek, E ^{[1
]}

机构：

[1] Univ Fed Santa Catarina, Dept Quim, BR-88040900 Florianopolis, SC, Brazil

来源：

TALANTA | 2000年 / 51卷 / 01期

关键词：

liquid-liquid microextractor; metals; atomic absorption spectrometry;

D O I：

10.1016/S0039-9140(99)00274-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple and fast method for the extraction into xylene of sub mu g l(-1) concentrations of metals using ammonium diethyldithiophosphate (DDTP) as a complexing reagent and their subsequent determination by flame atomic absorption spectrometry is described. The method was tested in sea water spiked with Au at a concentration of 3.0 mu g l(-1). The extraction was carried out until the aqueous to organic phase ratio achieved a 1000-fold preconcentration of metal. Optimisation of extraction parameters and the effect of Fe interference was investigated. Sea water samples spiked with Au produced an average recovery of 95% and the detection limit (3 sigma) in deionized water was 2.9 ng l(-1). High enrichment factors could be obtained due to the small final volume (mu l) of organic solvent. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：173 / 178

页数：6

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