Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

A differential equation is derived describing the course of pH measured by a membrane electrode after a stepwise change in the concentration of CO₂ in the measured solution on the assumption that a chemical equilibrium exists between the concentration of CO₂ and pH in the solution of hydrogen carbonate forming the inner electrolyte of the membrane electrode. The equation involves chemical equilibrium constants and an adjustable parameter. Calculations were carried out for selected literature data.