Title
Interference-free determination of selenium(iv) by capillary gas chromatography-microwave-induced plasma-atomic emission-spectrometry after volatilization with sodium tetraethylborate Interference-free determination of selenium(iv) by capillary gas chromatography-microwave-induced plasma-atomic emission-spectrometry after volatilization with sodium tetraethylborate
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
London ,
Subject
Chemistry
Source (journal)
Journal of analytical atomic spectrometry. - London
Volume/pages
10(1995) :2 , p. 111-115
ISSN
0267-9477
ISI
A1995QL03300007
Carrier
E
Target language
English (eng)
Abstract
Quantitative volatilization of Se-IV from aqueous solutions by its reaction with sodium tetraethylborate was developed and was followed by the determination of selenium by capillary gas chromatography-microwave-induced plasma atomic emission sepectrometry. An essential increase in the selectivity of the determination was observed compared with the commonly used gas chromatography-hydride generation atomic absorption spectrometry. The influence of the medium on the efficiency of the reaction was studied. Hydrochloric acid of 4 mol l(-1) was necessary to achieve maximum efficiency in the derivatization. The possibility of applying the derivatizating reaction for the selective determination of Se-IV in presence of Se-VI is discussed. A microwave-induced plasma was used as an atomizer. A detection limit of 8 ng l(-1) (for a 5 ml sample) in a fully automated system was achieved. The method was applied to the determination of selenium in natural water samples.
E-info
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