Simultaneous detection of iodine and iodide on boron doped diamond electrodes

TALANTA

卷:103

Article

Fierro, Stephane¹  Comninellis, Christos²  Einaga, Yasuaki^1,3 

[1] Keio Univ, Fac Sci & Technol, Dept Chem, Yokohama, Kanagawa 2238522, Japan

[2] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland

[3] JST, CREST, Yokohama, Kanagawa 2238522, Japan

关键词: Iodine;    Iodide;    Iodate;    Boron doped diamond electrodes;    Electrochemical detection;   

DOI  :  10.1016/j.talanta.2012.10.002

来源: Elsevier

【 摘 要 】

Individual and simultaneous electrochemical detection of iodide and iodine has been performed via cyclic voltammetry on boron doped diamond (SOD) electrodes in a 1 M NaClO4 (pH 8) solution, representative of typical environmental water conditions. It is feasible to compute accurate calibration curve for both compounds using cyclic voltammetry measurements by determining the peak current intensities as a function of the concentration. A lower detection limit of about 20 mu M was obtained for iodide and 10 mu M for iodine. Based on the comparison between the peak current intensities reported during the oxidation of KI, it is probable that iodide (I-) is first oxidized in a single step to yield iodine (I-2). The latter is further oxidized to obtain IO3-. This technique, however, did not allow for a reasonably accurate detection of iodate (IO3-) on a BDD electrode. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

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