Abstract
It has been shown in the past few years that the interface formed between two immiscible solutions of electrolytes can be treated, from an electrochemical point of view, in the same manner as the solution/electrode interface, and essentially the same techniques of electrochemical investigation can be used. A review of the methods pertaining to biologically important materials is given. Specifically, the following groups of experiments are treated: direct transport measurement of certain ionic species (choline, acetylcholine, and dodecylsulfate), transport of probe ions across the adsorbed material (lecithin and several proteins), impedance measurements in the presence of adsorbed bovine serum albumin, and transport across the interface facilitated by antibiotics (valinomycin and monensin).

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