A highly selective iodide electrode based on the bis(benzoin)-semiethylenediamine complex of mercury(II) as a carrier |
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| Authors: | You-Qun Song R Yuan M Ying Zhi-Qiang Li Y-Q Chai H Cui G-L Shen Ru-Qin Yu |
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| Institution: | Institute of Chemometrics and Chemical Sensing Technology, Chemistry and Chemical Engineering College, Hunan University, Changsha, 410082, China, CN
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| Abstract: | A new PVC membrane electrode based on the bis(benzoin)-semiethylenediamine (BBSEA) complex of Hg(II) is described which exhibits excellent selectivity towards iodide, related to the unique interaction between the central Hg(II) and the iodide ion. The electrode has a linear response to iodide from 5 × 10–7 to 5 × 10–4 mol/L with a slope of 58 mV/dec.(20°C). The response characteristics were investigated in detail and the mechanism of the electrode was studied with AC impedance and quartz crystal microbalance (QCM) techniques. It can be used for iodide determinations in drug preparations. |
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