抄録
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.
