Inorganic arsenic and selenium determination using miniaturised isotachophoresis

Jeff E. Prest, Sara J. Baldock, Peter R. Fielden, Nicholas J. Goddard, Bernard J. Treves Brown

    Research output: Contribution to journalArticlepeer-review


    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. © Springer-Verlag 2005.
    Original languageEnglish
    Pages (from-to)223-230
    Number of pages7
    JournalMicrochimica Acta
    Issue number3-4
    Publication statusPublished - Nov 2005


    • Arsenic
    • Chip
    • Isotachophoresis
    • Miniaturisation
    • Selenium


    Dive into the research topics of 'Inorganic arsenic and selenium determination using miniaturised isotachophoresis'. Together they form a unique fingerprint.

    Cite this