The use of indium(III) as a complexing counter-ion to enable the separation of chloride, bromide, and iodide using isotachophoresis

A new method has been devised to enable the determination of halide anions by isotachophoresis. This method uses an electrolyte system that employs indium(III) as a counter-ion to manipulate the effective mobilities of sample species by means of complexation reactions. This new procedure successfully enabled the simultaneous determination of the halide ions chloride, bromide, and iodide when a 12 mmol L−1 nitrate-based leading electrolyte containing 3.5 mmol L−1 indium(III) at pH 3.0 was used.

[1]  N. Goddard,et al.  Use of miniaturised isotachophoresis on a planar polymer chip to analyse transition metal ions in solutions from metal processing plants. , 2004, Journal of chromatography. A.

[2]  John Aurie Dean,et al.  Lange's Handbook of Chemistry , 1978 .

[3]  D. G. Tuck.  Critical survey of stability constants of complexes of indium , 1983 .

[4]  K. Fukushi,et al.  Simultaneous determination of bromide and iodide ions by capillary isotachophoresis using quaternary ammonium salts , 1997 .

[5]  R. C. Weast.  CRC Handbook of Chemistry and Physics , 1973 .

[6]  N. Goddard,et al.  Determination of inorganic selenium species by miniaturised isotachophoresis on a planar polymer chip , 2003, Analytical and bioanalytical chemistry.

[7]  K. Fukushi,et al.  Use of cyclodextrins in the isotachophoretic determination of various inorganic anions , 1990 .

[8]  D. Kaniansky,et al.  Influence of poly(vinylpyrrolidone) on isotachophoretic separations of inorganic anions in aqueous electrolyte systems , 1992 .

[9]  T. Hirokawa,et al.  Isotachophoretic determination of mobility and pKa by means of computer simulation : VI. Mobility and pKa of sixty anions in methanol , 1987 .

[10]  M. L. Richardson,et al.  The dictionary of substances and their effects , 1992 .

[11]  N. Goddard,et al.  Determination of the ascorbate content of photographic developer solutions using miniaturised isotachophoresis on a planar chip. , 2003, The Analyst.

[12]  B. Jastorff,et al.  New leading electrolyte for the direct determination of chloride and other anions in analytical isotachophoresis. , 1999, Journal of Chromatography A.

[13]  F. Everaerts,et al.  Isotachophoresis ☆: Experiments in methanol , 1970 .

[14]  P. Boček,et al.  Use of complex formation equilibria in the analytical isotachophoresis of strong electrolyte ions , 1977 .