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采用循环伏安法和微分电容测定等方法研究了核黄素在悬汞电极上的电化学行为．研究发现核黄素的氧化还原反应特性与 ｐＨ值密切相关：在 ｐＨ＜ ６的介质中，观察到一对前置波和一对扩散控制的两电子氧化还原波，还原产物 ＲＦＨ２在汞上的吸附为强吸附；在 ６＜ ｐＨ＜ １０的介质中，出现两对分离的单电子氧化还原波；在 ｐＨ＞ １０的介质中，仍然出现二对分离的氧化还原波，且前置波重新出现，显示还原产物在汞上的吸附较强．
The electrochemical behavior of riboflavin at the hanging mercury electrode was studied by cyclic voltammetry and differential capacitance measurement. It was found that the redox reaction of riboflavin is closely related to the pH value. In the medium of pH <6, a pair of forward wave and a pair of diffusion-controlled two-electron redox waves were observed. The reduction product of RFH2 on mercury Two pairs of separated single-electron redox waves appear in the medium of 6 10, and the pre-wave reappears , Indicating that the reduction product is strongly adsorbed on mercury.