Optimisation of sample pre-treatment in the HG-AAS selenium analysis

被引：0
|
作者：
L. Schloske
H. Waldner
F. Marx
机构：
[1] Institute of Food Science and Food Chemistry,
[2] University of Bonn,undefined
[3] Endenicher Allee 11–13,undefined
[4] 53115 Bonn,undefined
来源：
Analytical and Bioanalytical Chemistry | 2002年 / 372卷
关键词：
Selenium analysis Microwave digestion FI-HG-AAS Pre-reduction Denitrification Sample pre-treatment;
D O I：
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中图分类号：
学科分类号：
摘要：
A fast and accurate method of pre-treatment for biological materials in the hydride generation-atomic absorption spectroscopy (HG-AAS) selenium determination is described. All procedures of sample pre-treatment were performed in closed-vessels in a microwave oven. After sample decomposition using a HNO3/H2O2 mixture, the pre-reduction and a 'denitrification' step (reduction of interfering nitrogen intermediates) with amidosulfuric acid were combined. Hence, analysis time and the risk of element losses or the emergence of possible contamination are minimised.
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页码：700 / 704
页数：4
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