Miniaturised isotachophoretic analysis of inorganic arsenic speciation using a planar polymer chip with integrated conductivity detection

A new method allowing the analysis of inorganic arsenic species using isotachophoresis has been developed. This method has been shown to be suitable for use on both miniaturised planar polymer separation devices and capillary scale devices. A poly(methyl methacrylate) chip with integrated conductivi...

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Bibliographic Details
Published in:Journal of Chromatography A 2003-03, Vol.990 (1), p.325-334
Main Authors: Prest, Jeff E, Baldock, Sara J, Fielden, Peter R, Goddard, Nicholas J, Treves Brown, Bernard J
Format: Article
Language:English
Subjects:
Arsenic
Electric Conductivity
Electrophoresis - methods
Inorganic anions
Miniaturization
Polymers - chemistry
Sensitivity and Specificity
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Summary:A new method allowing the analysis of inorganic arsenic species using isotachophoresis has been developed. This method has been shown to be suitable for use on both miniaturised planar polymer separation devices and capillary scale devices. A poly(methyl methacrylate) chip with integrated conductivity electrodes has been successfully used for the rapid analysis of inorganic arsenic species in under 600 s. Limits of detection of 1.8 mg l −1 and 4.8 mg l −1 for arsenic(V) and arsenic(III), respectively, have been achieved with the miniaturised device. The device has also been used to perform the simultaneous separation of arsenic(III), arsenic(V), antimony(III), molybdenum(VI) and tellurium(IV).
ISSN:0021-9673
DOI:10.1016/S0021-9673(02)01968-4