TY - JOUR

T1 - Analysis of chloride, bromide and iodide using miniaturised isotachophoresis on a planar polymer chip

AU - Prest, J. E.

AU - Baldock, S. J.

AU - Fielden, P. R.

AU - Goddard, N. J.

AU - Brown, B. J. T.

PY - 2005/8/24

Y1 - 2005/8/24

N2 - A new method has been developed to allow the determination of the halide anions chloride, bromide and iodide using isotachophoresis. This method employs a new electrolyte system which incorporates the novel application of indium(III) as a complexing agent. This electrolyte system was devised based on the findings of an investigation into the potential for using indium(III) as a complexing counter ion to selectively manipulate the effective mobilities of halide ions. A leading electrolyte incorporating 3.5 mmol dm−3 of indium(III) allowed the simultaneous determination of chloride, bromide and iodide to be successfully achieved. The new procedure allows such separations to be made without interference from common inorganic anions such as sulfate and nitrate. Separations were performed using a miniaturised planar poly(methyl methacrylate) chip with integrated platinum wire conductivity detection electrodes. Using this instrumentation the limits of detection were calculated to be 0.7 mg dm−3, 1.7 mg dm−3 and 2.2 mg dm−3 for chloride, bromide and iodide respectively.

AB - A new method has been developed to allow the determination of the halide anions chloride, bromide and iodide using isotachophoresis. This method employs a new electrolyte system which incorporates the novel application of indium(III) as a complexing agent. This electrolyte system was devised based on the findings of an investigation into the potential for using indium(III) as a complexing counter ion to selectively manipulate the effective mobilities of halide ions. A leading electrolyte incorporating 3.5 mmol dm−3 of indium(III) allowed the simultaneous determination of chloride, bromide and iodide to be successfully achieved. The new procedure allows such separations to be made without interference from common inorganic anions such as sulfate and nitrate. Separations were performed using a miniaturised planar poly(methyl methacrylate) chip with integrated platinum wire conductivity detection electrodes. Using this instrumentation the limits of detection were calculated to be 0.7 mg dm−3, 1.7 mg dm−3 and 2.2 mg dm−3 for chloride, bromide and iodide respectively.

U2 - 10.1039/b507978k

DO - 10.1039/b507978k

M3 - Journal article

VL - 130

SP - 1375

EP - 1382

JO - Analyst

JF - Analyst

SN - 0003-2654

IS - 10

ER -