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溶出伏安法中决定分析准确度和重现性的关键是电极,汞电极、贵金属电极、碳电极、半导体氧化物电极及其各类固体电极的汞膜电极都可作工作电极,但各有千秋。其中汞膜电极的灵敏度较高,目前国内外多使用这种电极,但如何保持电极的性能,保证测定的重现性,仍是重要的研究课题。化学修饰电极是目前电化学和电分析化学领域中很有发展前途的研究方向,已用于溶出伏安分析,能够提高测定的灵敏度和选择性,并能防止实验室中汞的污染。本文概述了玻碳电极的特性、制作方法、化学处理、电化学处理以及玻碳电极的化学修饰和修饰电极的应用。
The key to the determination of the accuracy and reproducibility of the stripping voltammetry method is that the mercury electrode of the electrode, the mercury electrode, the noble metal electrode, the carbon electrode, the semiconductor oxide electrode and the various solid electrodes thereof can be used as the working electrode, but they have their advantages and disadvantages. Among them, the sensitivity of mercury film electrode is high. At present, the electrode is mostly used at home and abroad, but how to maintain the performance of the electrode and ensure the reproducibility of measurement is still an important research topic. Chemically modified electrodes are currently a promising area of research in the field of electrochemical and electroanalytical chemistry and have been used for stripping voltammetry to improve assay sensitivity and selectivity and to prevent mercury contamination in the laboratory. This paper summarizes the properties of glassy carbon electrodes, fabrication methods, chemical treatment, electrochemical treatment and the application of glassy carbon electrode for chemical modification and modification of electrodes.