Logarithmic analysis of polarographic waves complicated by nonparallel initial and limiting currents

Abstract

A procedure for the logarithmic analysis of polarographic waves w t h nonparallel initial and limiting currents is developed and its application illustrated with 1 x 7 0 experimental systems: phosphinemetriphonate reduction and methylene blue (MR) reduction and reoxidation. The procedure is based on the presumed identity of the wave function and the change of a double-layer capacitance along the wave. WORDS: Polarography, Data handling, Double layer capacitance. From a d.c. polarogram of a certain redox reaction, several important electrochemical parameters can be determined [ 1-31. A reactant concentration and a prod-