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The use of indium(III) as a complexing counter-ion to enable the separation of chloride, bromide, and iodide using isotachophoresis

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Abstract

A new method has been devised to enable the determination of halide anions by isotachophoresis. This method uses an electrolyte system that employs indium(III) as a counter-ion to manipulate the effective mobilities of sample species by means of complexation reactions. This new procedure successfully enabled the simultaneous determination of the halide ions chloride, bromide, and iodide when a 12 mmol L−1 nitrate-based leading electrolyte containing 3.5 mmol L−1 indium(III) at pH 3.0 was used.

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Acknowledgements

The authors would like to thank the United Kingdom Home Office for funding this research programme and the Forensic Explosives Laboratory, of the Defence Science and Technology Laboratory, Fort Halstead, for their support.

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Authors and Affiliations

  1. School of Chemical Engineering and Analytical Science, The University of Manchester, PO Box 88, Manchester, M60 1QD, UK

    Jeff E. Prest & Peter R. Fielden

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  1. Jeff E. Prest
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  2. Peter R. Fielden
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Correspondence to Jeff E. Prest.

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Prest, J.E., Fielden, P.R. The use of indium(III) as a complexing counter-ion to enable the separation of chloride, bromide, and iodide using isotachophoresis. Anal Bioanal Chem 382, 1339–1342 (2005). https://doi.org/10.1007/s00216-005-3267-4

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  • DOI: https://doi.org/10.1007/s00216-005-3267-4

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