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Use of miniaturised isotachophoresis on a planar polymer chip to analyse transition metal ions in solutions from metal processing plants

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<mark>Journal publication date</mark>27/08/2004
<mark>Journal</mark>Journal of Chromatography A
Issue number2
Volume1047
Number of pages10
Pages (from-to)289-298
Publication StatusPublished
Early online date3/08/04
<mark>Original language</mark>English

Abstract

An electrolyte system, using malic acid as a complexing agent, has been developed to allow the determination of transition metal cations using miniaturised isotachophoresis. The method allowed the simultaneous determination of Mn2+, Cr3+, Fe2+, Co2+, Zn2+ and Ni2+ to be made without interference from other common ions. Limits of detection were calculated to be in the range 0.5–1.0 mg l−1 for Mn2+, Cr3+ Co2+and Zn2+ and 2.0 mg l−1 for Fe2+ and 4.7 mg l−1 for Ni2+. The successful analysis of five industrial samples, containing a range of these metal ions, obtained from metal processing plants were achieved in under 13 min. The separations were performed on a poly(methyl methacrylate) chip with integrated platinum wire conductivity detection electrodes.