Polymeric Membrane and Solid Contact Electrodes Based on Schiff Base Complexes of Co(III) for Potentiometric Determination of Perchlorate Ions

Bulletin of the Korean chemical society

Ahmad Soleymanpour¹  Ali Hossein Kyanfar¹  Abdolghafoor Hanifi¹ 

关键词: Perchlorate selective electrode;    PVC membrane electrode;    Schiff base complex;    Potentiometry;    Sensors;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

New PVC based polymeric membrane electrodes (PME) and coated glassy carbon electrodes (CGCE) based on synthesized Schiff base complexes of Co(III); [Co(Salen)(PBu₃)₂]ClO₄, [Co(Me₂Salen)(PBu₃)₂]ClO₄, [Co(Salen)(PBu₃)H₂O]ClO₄; as anion carriers for potentiometric determination of ClO₄ ? were studied. The PME and also CGCE electrodes prepared with [Co(Me₂Salen)(PBu₃)₂]ClO₄ showed excellent response characteristics to perchlorate ions. The electrodes exhibited Nernstian responses to ClO₄ ? ions over a wide concentration range with low detection limits (1.0 �? 10^-6 mol L^-1 for PME and 9.0 �? 10^-7 mol L^-1 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 inorganic anions. The potentiometric response of the electrodes is independent of the pH in the pH range 2.5-8.5. The proposed sensors were used in potentiometric determination of perchlorate ions in mineral water and urine samples. The interaction of the ionophore with perchlorate ions was shown by UV/Vis spectroscopy.

【 授权许可】

Unknown