Determination method of interception rate of ultrafiltration membrane

Abstract

A determination method of interception rate of ultrafiltration membrane includes the following steps: A: adopting egg white as subject, and removing the yolk; B: preparing into a solution with a certain concentration with deionized water, wherein the concentration is of 1%-10%; C: adopting the solution as feed liquid of ultrafiltration, performing ultrafiltration treatment, determining the concentration of the permeation solution, comparing the determined concentration with the concentration of original solution, and calculating to obtain the interception rate of ultrafiltration membrane. The solution prepared in the method can be stored at low temperature, and can be reused or in one-time use. As the egg is low in cost and easily accessible, the method has lower determination cost, and is suitable for being adopted by the ultrafiltration membrane production plants.

Description

technical field [0001] The invention relates to a method for measuring the throttling rate of an ultrafiltration membrane, belonging to the field of ultrafiltration membrane production and measurement. Background technique [0002] At present, the determination method of ultrafiltration membrane cut-off rate is to make solution with the target substance of known molecular weight, then carry out ultrafiltration treatment to it with ultrafiltration membrane, measure the concentration of stock solution and the concentration of ultrafiltration permeate respectively, both After comparison, the throttling rate of the ultrafiltration membrane is calculated according to the formula. This method must first have known target substances, which are generally calibrated with biochemical products and blood extracts. These target substances are expensive, and the prepared solutions have a short shelf life and are easily denatured. Therefore, the ultrafiltration membrane throttling The cal...

AI Technical Summary

Problems solved by technology

This method must first have known target substances, which are generally calibrated with biochemical products and blood extracts. These target substances are expensive, and the prepared solutions have a short shelf life and are easily denatured. Therefore, the ultrafiltration membrane throttling The calibration of the rate is very expensive, and it is difficult for ordinary enterprises to bear. At the same time, the results of small tests are used to judge the throttling rate of industrial membrane modules, which also has great distortion.