Abstract
Kinetics of ion-exchange sorption of organic cations on the surface of ion-exchange membranes with low permittivity, which are the base of the majority of ion-selective electrodes, is studied and quantitatively described. It is disclosed that the rate of ion exchange is primarily governed by the lypophilicity of displacing ions, but the time of the establishment of equilibrium state is the diffusion-limited parameter. A mechanism of ion exchange of hydrophobic organic cations on the surface of selective membranes is proposed.
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