A method for estimating the rejection coefficient–molecular weight relationship of ultrafiltration membrane for a chain polymer by using gel permeation chromatography

Abstract

An improved method is presented for estimating rejection coefficient-molecular weight relationship of an ultrafiltration membrane for a polydisperse chain polymer. It is based on the basic idea using gel permeation chromatography originally developed by Cooper and Van Derveer. The method, in which peak spreading of an elution curve of the polymer was taken into consideration, is available for evaluating the relationship over a wide range of the molecular weight through only one experiment in analyses of the retentate and filtrate.

Measurement of molecular weight distributions of organic halide in kraft mill waste streams, waste solids and pulp

“…Rejection properties of ultrafiltration membranes have been investigated, and methods have been developed to determine a numerical constant to correct the mass concentration in the permeate to that in the sample. The use of gel permeation chromatography was originally proposed (11), and the method was modified to consider the spreading of chromatographic peaks due to molecular weight distributions within the standards used in determining calibration curves (12). HPLC using a gel permeation chromatographic column was used to determine the concentrations of standards in the retentate and the permeate.…”