Simultaneous detection of iodine and iodide on boron doped diamond electrodes
| Autor: | Stéphane Fierro, Yasuaki Einaga, Christos Comninellis |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Calibration curve
Iodide Inorganic chemistry Analytical chemistry chemistry.chemical_element Iodate Iodine Analytical Chemistry chemistry.chemical_compound Electrochemistry Electrochemical detection Electrodes Boron chemistry.chemical_classification Detection limit Iodides Boron doped diamond electrodes chemistry Yield (chemistry) Electrode Diamond Cyclic voltammetry Oxidation-Reduction |
| Zdroj: | Talanta. 103:33-37 |
| ISSN: | 0039-9140 |
| DOI: | 10.1016/j.talanta.2012.10.002 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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