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Comparison of interference in chemical, electrochemical and UV-photochemical generation methods of volatile Se species

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Abstract

We present a comparison of interference in three methods of generation of volatile Se species to compare their performance with regard to matrix effects. The effects of selected hydride forming elements, transition metals and electrolytes are quantified and the similarities and differences between the techniques are compared for individual interferents. The possibility that Co(II), Cr(III) and Ni(II) could be used to increase the response in UV-photochemical generation of volatile Se species is discussed. It was found that the increased sensitivity in the presence of Ni(II) is not due to the increased efficiency of generation but due to processes in the gaseous phase. In general, increased Se signals resulting from modified reactions were associated with alternative vapour generation methods. Electrochemical vapour generation suffers from permanent interference effects located on the cathode, but these were not observed with chemical and UV-photochemical vapour generation. Sb(III) interfered more severely than As(III) irrespective of the method used.

Graphical abstract: Comparison of interference in chemical, electrochemical and UV-photochemical generation methods of volatile Se species

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Publication details

The article was received on 08 Jun 2017, accepted on 24 Nov 2017 and first published on 24 Nov 2017


Article type: Paper
DOI: 10.1039/C7JA00208D
Citation: J. Anal. At. Spectrom., 2018, Advance Article
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    Comparison of interference in chemical, electrochemical and UV-photochemical generation methods of volatile Se species

    E. Nováková, M. Rybínová, J. Hraníček, P. Rychlovský and V. Červený, J. Anal. At. Spectrom., 2018, Advance Article , DOI: 10.1039/C7JA00208D

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