Electrochemical Determination of Hydrogen-Peroxide at Ultra-Microelectrodes

超微电极电化学测定过氧化氢

• 批准号: 63550560
• 负责人: AOKI Koichi
• 金额: $ 1.41万
• 依托单位: Fukui University (1989-1990)Tokyo Institute of Technology (1988)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550560/
• 关键词: Ultra-microelectrodes; Hydrogen peroxide; Quantitative determination; Catalytic reaction; Ozone; 過酸化水素の定量; カーボンファイバー電極; 吸着種の電極反応

Invivo quantitative determination requires spatial resolution in analyte because samples are localized in living tissues. The other requirement of the analysis is absolute determination without using a calikration curve because it is rarely possible to mimic invivo experimental conditions with invitro experiments. A ultro-microelectrode technique may fulfill these conditions, especially at carbon Fiber electrodes 8-10mum in diameter. Theoretical approaches on carbon Fiber electrodes have been made on a basis of a cylindrical model. It includes electrode kinetics in cyclic voltammetry. It has been verified experimentally by a simple redox system and oxidation of hydrogen peroxide. When solution involves a trace amount of imparities impurities cause catalytic reaction with hydrogen peroxide. As an example of the catalytic current, phenanthroline cuprous complex was selected, which was in th e solution, in absorption or in micellization depending on conditions. Determination of hydrogen peroxide was extended to selective analysis of ozone in tap water. This technique allows us to resolute ozone from chtorid ions.

体内定量测定需要分析物的空间分辨率，因为样品位于活组织中。分析的另一个要求是不使用校准曲线的绝对测定，因为用体外实验来模拟体内实验条件几乎是不可能的。超微电极技术可以满足这些条件，特别是在直径为8- 10 μ m的碳纤维电极上。本文在圆柱模型的基础上对碳纤维电极进行了理论探讨。它包括循环伏安法中的电极动力学。它已通过简单的氧化还原体系和过氧化氢的氧化得到了实验验证。当溶液中含有微量杂质时，杂质会与过氧化氢发生催化反应。以邻菲咯啉亚铜配合物为例，根据不同的条件，选择了在溶液中、吸附中或胶束化中的催化电流。将过氧化氢的测定方法推广到自来水中臭氧的选择性分析。这项技术使我们能够从石英离子中分离出臭氧。

项目成果

K.Aoki and N.kato: "Analysis of the cyclic e voltamnograms assocated with deposition on precipitation of the electrochemical product" J.Electroanal.Chem.245. 51-60 (1988)

K.Aoki 和 N.kato：“与电化学产物沉淀相关的循环伏安图分析”J.Electroanal.Chem.245。

K.Aoki and H.Kaneko: "Theory of irreversikle cyclic voltommograns at microcylinder electrodes" J.Electroanal.Chem.247. 17-27 (1988)

K.Aoki 和 H.Kaneko：“微圆柱电极上不可逆循环伏安理论”J.Electroanal.Chem.247。

K.Aoki,M.Ishida,K.Tokuda and K.Hasebe: "Electrode kinetics of the oxidation of hydrogen peroxide at pretreated glassy carbon aod carbon fiker electredes" J.Electroanal.Chem.251. 63-71 (1988)

K.Aoki、M.Ishida、K.Tokuda 和 K.Hasebe：“预处理的玻璃碳和碳纤维电极上过氧化氢氧化的电极动力学”J.Electroanal.Chem.251。

K.Sugiyama and K.Aoki: "Catalytic reactions of bis(1.10ーphenanthroline)cuprous complex with hydrcgen peroxide at glassy carbon and pyrolytic graphite electrodes" J.Electroanal.Chem.262. 211-219 (1989)

K.Sugiyama 和 K.Aoki：“双(1.10-菲咯啉)亚铜络合物与过氧化氢在玻璃碳和热解石墨电极上的催化反应”J.Electroanal.Chem.262 (1989)。

K.Aoki,H.Kanedo and K.Nozaki: "Estimation of charge transter kinetic parameters from irreversible cyclic voltammograms at carbon fiker electrodes" J.Electroanal.Chem.247. 29-36 (1988)

K.Aoki、H.Kanedo 和 K.Nozaki：“根据碳纤维电极的不可逆循环伏安图估算电荷转移动力学参数”J.Electroanal.Chem.247。