[The spectroelectrochemical characterization of electrochemical oxidation mechanism of vitamin E].

The electrochemical oxidation mechanism of vitamin E(VE) on pyrolytic graphite electrode (PGE) was studied by cyclic voltammetry. The results of experiment showed that the oxidative mechanism of VE was a quasi-reversible ECE process controlled by diffusion on PGE and the same on platinum electrode (PtE). The results of absorption spectroelectrochemistry experiment verified the oxidative mechanism of VE. It is clear that the oxidation of VE is a quasi-reversible 2e process to a divalent cation and followed by hydrolysis reaction to the quinone or semi-quinone compounds in acidic solution.