Hydride generation atomic absorption spectrometry with insitu graphite tube trapping for the determination of Se (IV) and Se (VI) in baltic sea water samples |
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Authors: | P. Niedzielski M. Siepak B. Dudzińska-Huczuk |
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Affiliation: | (1) Department of Water and Soil Analysis, Adam Mickiewicz University, 24 Drzymały Street, 60-613 Poznań, Poland;(2) Department of Hydrogeology and Waters Protection, Adam Mickiewicz University, Poznań, Poland;(3) Faculty of Biology, Geography and Oceanology, Gdańsk University, Poland |
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Abstract: | This paper reports the results of an optimisation study for a procedure to determine the total selenium and its inorganic species, Se(IV) and Se(VI) using atomic absorption spectrometry combined with hydride generation and in-situ trapping of the analyte on the inner walls of the graphite tube. With the use of the proposed modification, a detection limit (3σ) of 0.018 ng/ml is achieved. This paper presents exemplary results, according to the proposed procedure, for selenium determination in samples of marine water. The concentrations of selenium in the samples ranged from <0.02 ng/ml to 0.16ng/ml of Se(IV) and from <0.02 ng/ml to 0.10 ng/ml of Se(VI). |
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Keywords: | selenium atomic absorption spectrometry hydride generation in-situ trapping |
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