It is discussed that the theory of adsorptive-complex wave for the electrode process controlled simultaneously by multiple factors such as adsorption, diffusion, charge transfer rate and so on. The general equations for the reversible, quasi-reversible, irreverrsible adsorptive-complex waves include normal polarographic wave equation, the first derivative polarographic wave equation and the second derivative polarographic wave equation is also investigated. The theoretical conclusions are in good agreement with experimental data for the reduction of Pb(II) in the presence of oxine.

Key words: ADSORPTION, DIFFUSION, ELECTRODE REACTION, DEMONSTRATION TEST, HYDROXY QUINOLINES