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Perchlorate selective membrane electrodes based on a platinum complex
Authors:Ahmad Soleymanpour  Bahram Garaili  S Masoud Nabavizadeh
Institution:(1) Department of Chemistry, Damghan Basic Science University, Damghan, Iran;(2) Department of Chemistry, Shiraz University, Shiraz, Iran
Abstract:Three platinum(II) complexes were synthesized and studied to characterize their ability as an anion carrier in a PVC membrane electrode. The polymeric membrane electrodes (PME) and also coated glassy carbon electrodes (CGCE) prepared with one of these complexes showed excellent response characteristics to perchlorate ions. The electrodes exhibited Nernstian responses to ClO4 ions over a wide concentration range from 1.5 × 10−6 to 2.7 × 10−1M for PME and 5.0 × 10−7 to 1.9 × 10−1M for CGCE with low detection limits (9.0 × 10−7M for PME and 4.0 × 10−7M for CGCE). The electrodes possess fast response time, satisfactory reproducibility, appropriate lifetime and, most importantly, good selectivity toward ClO4 relative to a variety of other common anions. The potentiometric response of the electrodes is independent of the pH of the test solution in the pH range 2.0–9.0. The proposed sensors were used in potentiometric determination of perchlorate ions in mineral water and urine samples. Correspondence: Ahmad Soleymanpour, Department of Chemistry, Damghan Basic Science University, Damghan, Iran.
Keywords:Ion selective electrode  Perchlorate determination  PVC membrane electrode  Platinum complex  Potentiometry  
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