Abstract: The mechanism of the electrochemical oxidation of adrenaline was studied using fastscan cyclic voltammetry as a major means.In 1 mol•dm－3 H2SO4,the electrooxidation of adrenaline showed the elementary characteristics of diffusion and were companied by the weak adsorption of electroactive species.In the case of fastscan test,the electrooxidation of adrenaline was considered to obey EC(electron transferchemical reaction) mechanism..When the concentration of adrenaline was below 1.00×10－3 mol•dm－3,the characteristics of adsorption was easily detected.And the characteristics of adsorption became more evident as the concentration of adrenaline was decreased or the potential scan rate was increased.The transfer coefficient α and the rate constant of the electrochemical reaction ks were calculated as 0.264 and 31.81 s－1 respectively.

Key words: Adrenaline, Electrochemical oxidation, Fast-scan cyclic voltammetry, 　 Cyclic voltammetry, Weak adsorption