Inorganic arsenic and selenium determination using miniaturised isotachophoresis

Prest, J. E. and Baldock, S. J. and Fielden, P. R. and Goddard, N. J. and Brown, B. J. T. (2005) Inorganic arsenic and selenium determination using miniaturised isotachophoresis. Microchimica Acta, 151 (3-4). pp. 223-230. ISSN 0026-3672

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A new method allowing the simultaneous determination of arsenic(V), selenium(IV) and selenium(VI) using miniaturised isotachophoresis has been developed. The method uses 0.02 M nitric acid buffered to pH 5.5 with histidine as the leading electrolyte. Using a miniaturised poly(methyl methacrylate) chip device with an integrated conductivity detector, separations of model samples and an industrial process stream sample were achieved. Limits of detection were calculated to be 0.85 mg L−1 for arsenic(V), 0.95 mg L−1 for selenium(IV) and 1.0 mg L−1 for selenium(VI). A method for the analysis of arsenic(III), using a glycolic acid based leading electrolyte to eliminate carbonate interference is also presented.

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Journal Article
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Microchimica Acta
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06 Jan 2016 11:26
Last Modified:
17 Sep 2023 01:46