Electrochemical Behavior of Ion Exchange Resin Membrane Electrodes

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Abstract
A study was made of the preparation and electrochemical properties of ion exchange resin membrane electrodes prepared from a number of different cation and anion exchange resins. The membranes were prepared by molding a mixture containing 30% of 200 mesh exchange resin with 70% of 80 mesh methyl methacrylate at a temperature of about 100[degree]C and a pressure of 4000 lb./square inch. Complete characterization data are given for Amberlite IR-120-K and Ca membranes. The Amberlite IR-120-K form membranes obey the Teorell-Meyer-Sievers theory. Results show that when ion exchange resin membrane electrodes are completely characterized they may be used to determine activities of monovalent and divalent salts in solutions of activities from 0.001 to 0.1 when the same salt is used as the reference. The membranes give reproducible potentials that agree closely with the theoretical Nernst potential. These membrane electrodes were used in studies on activities of cations and anions in milk and casein sols containing the salts common in milk.