title: Clotrimazole-triiodide ion association as an ion exchanger for a triiodide ion-selective electrode.
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 x 10(-6) to 5 x 10(-3) M with a slope of -68.9 mV per decade and a detection limit of 5 x 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.
authors.affiliation: Department of Chemistry, Faculty of Science, Urmia University, Iran. kh.farhadi@mail.urmia.ac.ir
authors.forename: Khalil
authors.initials: K
authors.lastname: Farhadi
authors.forename: Ramin
authors.initials: R
authors.lastname: Maleki
mesh_terms: D003022:Clotrimazole / Q000032:analysis*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007454:Iodides / Q000032:analysis*; D007474:Ion Exchange; D008567:Membranes, Artificial; D011199:Potentiometry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D007202:Indicators and Reagents; D007454:Iodides; D008567:Membranes, Artificial; D003022:Clotrimazole