关键词: 反应机理, 维生素C, Ｘ射线光电子谱法, 苯二酚 P, 同时测定, 电催化, 循环伏安法, 儿茶酚, 计时库仑法, 玻碳电极

The surface structure of glassy C electrode subjected to "galvanostat" pretreatment and its electrocatalytic behavior in the presence of ascorbic acid, catechol and hydroquinone were studied by means of cyclic voltammetry, chronoamperometry, chronocoulometry and SEM. The electrocatalytic mechanism is discussed, which was due to the adsorption and the catalysis of functional groups at the electrode surface. Three separated peaks from the mixture of catechol, hydroquinone and ascorbic acid appeared on the electrochem. pretreated electrode which might be useful for biochem. anal. of these compounds

Key words: REACTION MECHANISM, VITAMIN C, X-RAY PHOTOELECTRON SPECTROMETRY, BENZENEDIOL P, SIMULTANEOUS DETERMINATIONS, ELECTRO-CATALYSIS, CYCLOVOLTAMGRAPH, CATECHOL, CHRONOCOULOMETRY, GLASSY CARBON ELECTRODE