The electrochem. polymd. azure A film electrode was firstly reported in this paper. A quasi-reversible electrode processes of myoglobin with the formal heterogeneous electron transfer rate constant (ksh) of 1.73 ?10-4 cm譻-1 at the polymd. azure A modified electrode were achieved using in-situ UV-visible spectroelectrochem. The adsorption of myoglobin on the polymd. azure A film electrode surface was confirmed by XPS. With simultaneously studying of cyclic voltammetry and in-situ cyclic voltaabsorptometry, the attribution of the voltammetry responses of myoglobin at the film electrode was studied. The mechanism for the heterogeneous electron transfer of myoglobin at the polymd. azure A film modified electrode is proposed as well.

Key words: REACTION MECHANISM, X-RAY PHOTOELECTRON SPECTROMETRY, THIN FILM ANODES, CYCLOVOLTAMGRAPH, MYOGLOBIN, ELECTRODE REACTION, SURFACES ADSORPTION, THERMODYNOMICS PARAMETER