Determination of the potassium content of explosive residues using miniaturised isotachophoresis

Prest, Jeff E. and Beardah, Matthew S. and Baldock, Sara J. and Doyle, Sean P. and Fielden, Peter R. and Goddard, Nicholas J. and Brown, Bernard J. Treves (2010) Determination of the potassium content of explosive residues using miniaturised isotachophoresis. Electrophoresis, 31 (22). pp. 3775-3782. ISSN 0173-0835

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Electrophoresis
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1300/1308
Subjects:
ID Code:
77385
Deposited By:
Deposited On:
23 Dec 2015 11:34
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 09:31