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１引言辅酶Ⅰ的还原反应较难实现，其氧化则需较高的过电位。因此，适于辅酶Ⅰ电化学研究的各类修饰电极及新型电极材料不断问世，运用电化学方法检测这一重要生物物质也成为可能。本课题组曾报道辅酶Ⅰ在银电极上于酸性介质ＨＡｃ－ＮａＡｃ缓冲液中的电化学行为，发现不加修
1 Introduction Coenzyme Ⅰ reduction reaction is more difficult to achieve, the oxidation is required higher over-potential. Therefore, all kinds of modified electrodes and new electrode materials suitable for the study of coenzyme Ⅰ electrochemistry continue to come into being. It is also possible to detect this important biological substance by electrochemical method. Our group reported the electrochemical behavior of coenzyme I on silver electrode in acidic medium HAc-NaAc buffer and found that without modification