Determination of the potassium content of explosive residues using miniaturised isotachophoresis

被引：7
|
作者：
Prest, Jeff E. [1 ]
Beardah, Matthew S. [2 ]
Baldock, Sara J. [1 ]
Doyle, Sean P. [2 ]
Fielden, Peter R. [1 ]
Goddard, Nicholas J. [1 ]
Brown, Bernard J. Treves [1 ]
机构：
[1] Univ Manchester, Sch Chem Engn & Analyt Sci, Manchester M13 9PL, Lancs, England
[2] Dstl, Forens Explos Lab, Sevenoaks, Kent, England
来源：
ELECTROPHORESIS | 2010年 / 31卷 / 22期
基金：
英国工程与自然科学研究理事会;
关键词：
Explosive residues; Inorganic cations; Isotachophoresis; Miniaturisation; CAPILLARY-ELECTROPHORESIS; CONDUCTIVITY DETECTION; ZONE-ELECTROPHORESIS; POSTBLAST RESIDUES; TRACE EXPLOSIVES; PLANAR CHIP; METAL-IONS; CATIONS; WATER; ALKALI;
D O I：
10.1002/elps.201000263
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
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 mu g/mL with a coefficient of determination of 0.999 achieved.
引用
收藏
页码：3775 / 3782
页数：8
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