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The problem of complex curves in normal pulse polarography

Two types of complex curves are discussed: (I) those obtained for binary mixtures of substances redcing at similar potentials and (II) those corresponding to the two-electron consecutive processes: O Z R and O ⇌ Z R. A convenient procedure of curve fitting for the above two cases of complex normal pulse polarographic (NPP) curves is presented and applied for some two-electron consecutive electroreductions.