Thiocyanate and nitrite analysis using miniaturised isotachophoresis on a planar polymer chip

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

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A new method has been developed to improve the determination of thiocyanate using isotachophoresis. This method uses complexation with copper(II) as a mechanism for improving the separation of thiocyanate from chlorate and perchlorate. By using a pH of 3.25 the method can also be used to analyse nitrite. Separations were carried out using a miniaturised poly(methyl methacrylate) (PMMA) separation device. Linearity was observed from 1.25 to 75 mg dm-3 with a correlation coefficient of 0.998 for both thiocyanate and nitrite. Limits of detection for these two species were calculated to be 0.8 mg dm-3 and 0.9 mg dm-3 respectively. The method was successfully applied to the analysis of these anions in a range of samples including explosive residues. © The Royal Society of Chemistry 2011.
    Original languageEnglish
    Pages (from-to)3170-3176
    Number of pages6
    JournalAnalyst
    Volume136
    Issue number15
    DOIs
    Publication statusPublished - 7 Aug 2011

    Keywords

    • ITP
    • EXPLOSIVE RESIDUES
    • SMALL CATIONS
    • CHIP PMMA
    • SCN
    • NITRITE

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