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《Journal of Analytical Science》 2012-01
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Highly Selective Polymeric Membrane Ion-selective Electrode for Hg~(2+) Using Azathiacrown Ether as Ionophore

ZHAO Yue-qian1,2,ZHANG Jun3,YIN Tan-ji1, DING Jia-wang1,2,QIN Wei1(1.Shandong Provincial Key Laboratory of Coastal Environmental Processes,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264003; 2.Graduate University of Chinese Academy of Sciences,Beijing 100049; 3.School of Tropical and Laboratory Medicine,Hainan Medical University,Haikou 571101)  
A highly selective polymeric membrane Hg2+ electrode was developed in this study.The values of selectivity coefficients showed that most interfering ions had no significant interference with the determination of Hg2+.Calibration curves were obtained by using pH=4.40 HAc-NaAc buffer solution as background solution.The electrode showed a good linear response for Hg2+ over a wide concentration range from 3.0×10-8 to 1.0×10-4 mol/L,with a near-Nernstian slope of 31.2 ± 0.1 mV/dec and a detection limit of 2.0×10-8 mol/L.The proposed Hg2+-ISE has been successfully used for the titration of Hg2+ with EDTA.
【Fund】: 中国科学院知识创新工程重要方向项目(No.KZCX2-YW-410);; 国家自然科学基金(No.40776058);; 国家863计划(No.2007AA09Z103)
【CateGory Index】: O657.15
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