Optical interference study of dextran 70Â kDa transportation through a synthetic membrane

The paper presents results of a study of dynamics of dextran transportation through a synthetic membrane separating the system made of the infusion liquid and water. Changes in the optical density on both sides of the membrane permit the application of the sensitive method of optical interference for analysis of changes in the solution concentration, determination of the dextran molecule radius and the parameters characterising the membrane permeability. The membrane pore size was estimated under a scanning electron microscope.