Abstract
A method was developed for rapid measurement of the salt rejecting characteristics of hyperfiltration membranes based on the theory of concentration polarization in an unstirred system. A piston forces solution through a cylinder (an adapted one cc tuberculin syringe) sealed at one end by a membrane. The transmission rate of the membrane and the concentration of the effluent are measured and the concentration-flux curves compared with those computed theoretically through solution of the time-dependent diffusion equation. Results have been obtained that agree well with theory and also with other experimental observations.
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