Induced reactant adsorption in normal pulse polarography of labile metal polyelectrolyte systems part 1. Study of current-potential relationship assuming potential-independent adsorption parameters

Abstract

A model for the interpretation of the normal pulse polarographic reduction of a metal ion in a metal polyelectrolyte system, including both the polyelectrolyte adsorption and the induced adsorption of the metal ion, is developed. The influence of the physical parameters included in the model on the maximum and limiting currents has received special attention. This knowledge is of great importance for the development of a physical picture of the behaviour of the system. The following restrictions have been assumed: (i) large excess of the macromolecular ligand; (ii) labile complex; (iii) reversible charge transfer; (iv) Langmuirian adsorption of both the complex and the ligand species; and (v) the adsorption coefficients of the ligand and the complex are potential-independent.