CHEMICAL INFORMATION FROM ELECTROANALYTICAL DATA.PART 1—DETERMINATION OF SYSTEM PARAMETERS FOR QUASI-REVERSIBLE ELECTRON TRANSFER REACTIONS FROM CYCLIC VOLTAMMETRIC TEST DATA AND DATA FOR THE REDUCTION OF CERIUM(Ⅳ)BIS(OCTAETHYLPORPHYRINATE)

Values of the peak potential,the peak current function and the peak potential difference are extractedfrom simulated cyclic voltammograms of a quasi-reversible electron transfer reaction.Variations of thefeature values are described by empirical functions of the model parameters α(transfer coefficient)andψ'(dimensionless form of the heterogeneous electron transfer rate constant k_s)using multiple linearregression.These functions are used to determine the system parameters α and k_s from test data sets offeature values.The predictive power of the features is discussed.It is shown that several features can beused simultaneously in the analysis.Also,α,k_s,the formal potential E~0 and the diffusion coefficient Dcan be estimated simultaneously.Experimental data from the metal-centered one-electron reduction ofcerium(Ⅳ)bis(octaethylporphyrinate),Ce(OEP)_2,are analyzed using the technique,and values of thesystem parameters for this electrochemical reaction are determined.