Calculation of adsorption-related parameters from a.c. polarographic data: : Basis and Computer Programs

Abstract

Phase-selective alternating current polarography can be advantageously used for the observation and quantitative description of adsorption at a solution--electrode interface; for example, in the absence of a faradaic process, the quadrature current component is simply related to the interfacial differential capacity. Such a.c. measurements are especially advantageous for the occasional investigation of adsorption. The basis of using such measurements is considered; the data analysis is examined; specifics for computer calculation of differential capacity, surface charge density, and relative surface excess, and the requirements for data smoothing are described. The computer programs developed are sufficiently general for handling special situations.