MEMBRANE-POTENTIAL AND ION FLUX IN A REVERSE TRANSPORT-SYSTEM WITH A LIQUID MEMBRANE USING MONENSIN AS A CARRIER

Reverse transport coupled to a chemical reaction was studied with a liquid membrane-electrolyte system. The membrane was prepared by dissolving 10** minus **2 mol-dm** minus **3 monensin in 1-octanol; it was supported by a Millipore filter. The membrane showed an ideal potential response for Na** plus and H** plus cations. A system with the same Na** plus ion concentrations in both exterior aqueous phases was chosen as the reverse transport system. The membrane potential and the ion flux could be described consistently according to equations derived on the assumption of a rapid acid-base reaction taking place at the boundary.