Determination of the potassium content of explosive residues using miniaturised isotachophoresis

Jeff E. Prest, Matthew S. Beardah, Sara J. Baldock, Sean P. Doyle, Peter R. Fielden, Nicholas J. Goddard, Bernard J Treves Brown

    Research output: Contribution to journalArticlepeer-review


    A new method has been developed to allow the determination of potassium in post-explosion residues to be made using miniaturised isotachophoresis. The method is based on the use of a caesium leading ion with 4.5-mM 18-crown-6 ether added to retard the potassium to allow reliable determinations to be made. With the conditions selected no interference was noted from other small inorganic cations, such as ammonium, barium, calcium, magnesium, sodium or strontium. The method was successfully applied to the analysis of seven samples containing explosive residues obtained from the unconfined burning of several flash powders. The procedure was found to offer good linearity for potassium determinations over the concentration range of 1.25-150-μg/mL with a coefficient of determination of 0.999 achieved. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Original languageEnglish
    Pages (from-to)3775-3782
    Number of pages7
    Issue number22
    Publication statusPublished - Nov 2010


    • Explosive residues
    • Inorganic cations
    • Isotachophoresis
    • Miniaturisation


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