Separation and preconcentration of Se(IV)/Se(VI) species by selective adsorption onto nanometer-sized titanium dioxide and determination by graphite furnace atomic absorption spectrometry

被引：5

作者：

Shunxing Li

Nansheng Deng

机构：

[1] Department of Environment Science,

[2] Wuhan University,undefined

[3] Wuhan,undefined

[4] 430072,undefined

[5] P. R. China,undefined

[6] Department of Chemistry,undefined

[7] Zhangzhou Teachers College,undefined

[8] Zhangzhou,undefined

[9] 363000,undefined

[10] P. R. China,undefined

来源：

Analytical and Bioanalytical Chemistry | 2002年 / 374卷

关键词：

Selenium Speciation Preconcentration Titanium dioxide Atomic absorption spectrometry;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A simple and sensitive method for the selective determination of Se(IV) and Se(VI) in natural water and sludge samples through an adsorptive process on a nanometer-sized TiO2 (anatase) was developed. The conditions for quantitative and reproducible preconcentration, elution, and subsequent GFAAS determination were established. The proposed method gave a concentration factor of 50 for a 100 mL sample volume, characterized by high precision, high reproducibility, and direct determination of Se(IV)/Se(VI). The detection limits (3σ, n=11) were 4.7 ng L–1 for Se(IV) and 6.3 ng L–1 for Se (VI); the precision (relative standard deviation) was 0.7% for Se (IV) and 0.9% for Se (VI) at the 0.5 µg L–1 level.

引用

页码：1341 / 1345

页数：4