Development of Electrolyte-Free Ozone Sensors Using Boron-Doped Diamond Electrodes

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• 作者：Yuya Ishii ; Tribidasari A. Ivandini ; Kazutaka Murata ; Yasuaki Einaga
• 刊名：Analytical Chemistry
• 出版年：2013
• 出版时间：May 7, 2013
• 年：2013
• 卷：85
• 期：9
• 页码：4284-4288
• 全文大小：310K
• 年卷期：v.85,no.9(May 7, 2013)
• ISSN：1520-6882

文摘

The electrochemical detection of dissolved ozone in water was examined using boron-doped diamond (BDD) electrodes. A well-defined reduction peak was observed at 380 mV for H-terminated BDD, whereas it was observed at 200 mV in the case of O-terminated BDD for an ozone solution in a 0.1 M phosphate buffer solution at pH 7. The peak potential for ozone reduction was selective with respect to oxygen reduction at both H- and O-terminated BDD electrodes, whereas it occurred at approximately the same potential as oxygen reduction at other types of solid electrodes, including glassy-carbon, platinum, and gold electrodes. Interference from chlorine was not observed in lower concentration than 300 渭M ClO^{鈥?/sup>. Furthermore, in order to apply the detection technique to electrolyte-free media, BDD microelectrodes were also used. A linear calibration curve for dissolved ozone in water could be achieved between concentrations of 0.49 and 740 渭M, with an estimated detection limit (S/N = 3) of 0.185 渭M (S/N = 3). Excellent stability was demonstrated for repetitions of these calibration curves performed in 3 consecutive days.}