title: Thiocyanate and nitrite analysis using miniaturised isotachophoresis on a planar polymer chip.
abstract: A new method has been developed to improve the determination of thiocyanate using isotachophoresis. This method uses complexation with copper(II) as a mechanism for improving the separation of thiocyanate from chlorate and perchlorate. By using a pH of 3.25 the method can also be used to analyse nitrite. Separations were carried out using a miniaturised poly(methyl methacrylate) (PMMA) separation device. Linearity was observed from 1.25 to 75 mg dm(-3) with a correlation coefficient of 0.998 for both thiocyanate and nitrite. Limits of detection for these two species were calculated to be 0.8 mg dm(-3) and 0.9 mg dm(-3) respectively. The method was successfully applied to the analysis of these anions in a range of samples including explosive residues.
authors.affiliation: School of Chemical Engineering and Analytical Science, Manchester Interdisciplinary Biocentre, University of Manchester, Oxford Road, Manchester, UK M13 9PL. j.prest@manchester.ac.uk
authors.forename: Jeff E
authors.initials: JE
authors.lastname: Prest
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Baldock
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Beardah
authors.forename: Sean P
authors.initials: SP
authors.lastname: Doyle
authors.forename: Peter R
authors.initials: PR
authors.lastname: Fielden
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Goddard
authors.forename: Bernard J
authors.initials: BJ
authors.lastname: Treves Brown