DETERMINATION OF DIFFUSION SALT FLOW-THROUGH MEMBRANES FROM MEASUREMENTS OF ELECTRIC CONDUCTANCE

The salt flow through passive membranes, separating two solutions of t he same electrolyte but of different concentrations, has been obtained from a method based on the determination of the electric resistance b etween two fixed points in the more diluted solution. It permits to de termine the membrane system permeability and the ionic permeabilities, if the corresponding membrane potentials are known. The described met hod has been applied to Millipore membranes of different pore diameter and with different 1-1 electrolyte solutions.