Theory and application of analytical spectroelectrochemistry with long path length spectroelectrochemical cells: Part I. Integral equation connecting the absorbance with the concentration distribution and its use in digital simulation for long path length thin layer spectroelectrochemical cells

Abstract

An integral equation connecting the absorbance with the concentration distribution for analytical spectroelectrochemistry in long path length cells was derived. On the basis of the numerical integration form of the equation a finite difference model for digital simulation of the long path length thin layer spectroelectrochemical cell with a single potential step was set up. The concentration distribution at different moments determined with the technique was confirmed by theoretical results and the variation with time of the simulated absorbance curve was in agreement with that obtained by experiment, and hence the treatment can be applied for the estimation of parameter and the study of kinetics and mechanisms of electrochemical systems.