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Seneviratne J, Holmstrom SD, Cox JA. Donnan dialysis preconcentration coupled with ion chromatography and electrocatalytic oxidation for the determination of cyanide. Talanta. 2000;52(6):1025-31doi: 10.1016/s0039-9140(00)00478-1.
Seneviratne, J., Holmstrom, S. D., & Cox, J. A. (2000). Donnan dialysis preconcentration coupled with ion chromatography and electrocatalytic oxidation for the determination of cyanide. Talanta, 52(6), 1025-31. https://doi.org/10.1016/s0039-9140(00)00478-1
Seneviratne, J, et al. "Donnan dialysis preconcentration coupled with ion chromatography and electrocatalytic oxidation for the determination of cyanide." Talanta vol. 52,6 (2000): 1025-31. doi: https://doi.org/10.1016/s0039-9140(00)00478-1
Seneviratne J, Holmstrom SD, Cox JA. Donnan dialysis preconcentration coupled with ion chromatography and electrocatalytic oxidation for the determination of cyanide. Talanta. 2000 Sep 05;52(6):1025-31. doi: 10.1016/s0039-9140(00)00478-1. PMID: 18968063.
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Talanta. 2000 Sep 05;52(6):1025-31. doi: 10.1016/s0039-9140(00)00478-1.

Donnan dialysis preconcentration coupled with ion chromatography and electrocatalytic oxidation for the determination of cyanide.

Talanta

J Seneviratne, S D Holmstrom, J A Cox

Affiliations

  1. Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA.

PMID: 18968063 DOI: 10.1016/s0039-9140(00)00478-1

Abstract

An electrocatalytic amperometric detector for the ion chromatographic determination of CN(-) is described. A conducting composite that is based on a graphite-loaded sol-gel material comprises the working electrode. The composite is doped with a Ru(II) metallodendrimer which is demonstrated to promote the electrochemical oxidation of CN(-) at potentials positive of 0.5 V vs. Ag/AgCl. In 6 mM NaOH, 0.05 M NaCl flowed at 1.0 ml min(-1), a 5-point calibration curve with the following linear least squares parameters is obtained over the range, 1.0-30 M CN(-): slope, 24.2+/-0.1 nA M(-1); intercept, -6+/-2 nA; and r, 0.9997. The detection limit, 0.7 muM CN(-), compares favorably to that obtained by amperometry at a silver electrode, 0.5 muM CN(-), under comparable experimental conditions. A 60-min preconcentration by Donnan dialysis increases the sensitivity by a factor of 23.6.

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