Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Original Papers
Clotrimazole-Triiodide Ion Association as an Ion Exchanger for a Triiodide Ion-Selective Electrode
Khalil FARHADIRamin MALEKI
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2002 Volume 18 Issue 2 Pages 133-136

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Abstract

A novel triiodide ion-selective electrode based on a clotrimazole-triiodide ion pair as a membrane carrier was prepared. It has a linear response to triiodide from 8 × 10-6 to 5 × 10-3 M with a slope of -68.9 mV per decade and a detection limit of 5 × 10-6 M. The electrode response is independent of the pH of the solution in the pH range 2 - 9. It has a very short response time and can be used for at least 3 months without any considerable divergence in the potentials. The proposed sensor revealed very good selectivities for I3- over a variety of other anions. It was used as an indicator electrode in the potentiometric titration of triiodide ions and in an indirect potentiometric determination of clotrimazole in pharmaceutical preparations.

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© 2002 by The Japan Society for Analytical Chemistry
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