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Ketoconazol‐Triiodide Ion Pair Complex as a Suitable Carrier in an Iodide Selective Membrane Electrode
Author(s) -
Maleki Ramin,
Hosseinzadeh Reza,
Matin Amir Abbas,
Farhadi Khalil
Publication year - 2007
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200700100
Subject(s) - chemistry , potentiometric titration , iodide , triiodide , membrane , inorganic chemistry , ion selective electrode , electrode , selectivity , glass electrode , ion , analytical chemistry (journal) , working electrode , chromatography , electrochemistry , organic chemistry , catalysis , biochemistry , dye sensitized solar cell , electrolyte
A novel membrane sensor for selective monitoring of iodide, consisting of a triiodide‐ketoconazole ion pair complex dispersed in a PVC matrix, plasticized with a mixture of 2‐nitrophenyl octyl ether and dioctylphtalate with unique selectivity toward iodide ions, is described. The influence of membrane composition, pH of test solution and foreign ions on the electrode performance were investigated. The optimized membrane demonstrates a near‐Nernstian response for iodide ions over a wide linear range from 1.0 × 10 −2 to 1.0 × 10 −5 M, at 25 ± 1 °C. The electrode could be used over a wide pH range 3–10 and has the advantages of high selectivity, fast response time and good lifetime (over 4 months). It was successfully used as indicator electrode in potentiometric titrations and direct potentiometric assay of iodide ions.