Ion Transport in Asymmetric Artificial Membranes Mediated by Neutral Carriers
Valuable information on the selectivity behavior and the response mechanisms of analytically relevant neutral carrier membrane electrodes has been obtained from ion transport studies performed on the corresponding cation-selective membranes [9,10,15,16]. In electrodialysis experiments, the permeation of cations was induced by a transmembrane potential gradient, whereas in zero current countertransport systems, cations were driven by an oppositely directed flow of hydrogen ions, as induced by a pH gradient. The selectivity of ion transport was usually found to correlate with the potentiometric ion selectivity of the corresponding membrane electrodes [9, 10, 15, 16]. So far, virtually all experiments have concentrated on homogeneous PVC membranes.
KeywordsComposite Membrane Transport Number Cathode Compartment Polar Membrane Asymmetric Membrane
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