Abstract
AbstractAn improved mathematical model of dynamic responses of a glass pH electrode and its correlation with that of a membrane‐mounted glass pH electrode on the basis of HCl diffusion through the stagnant layer is reported here. The application of such a model and its validity to aqueous and gel films, such as porcine gastric mucus, is evaluated across the pH spectrum. Dynamic responses of the membrane‐mounted glass pH electrode, modelled on this basis gave an excellent fit to the experimental data across the pH range for both films. The modified model described here takes into account the presence of any effect at the membrane/mucus interface for the experimental set‐up. The technique and model thus enables determination of ion flux in mucus or any coated ion selective electrode.
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