A Simple Two-Chamber Electrodialyzer

Abstract

A very simple electrodialyzer is described and its effectiveness illustrated. In its present design this apparatus is well-suited for handling volumes of 150 ml and less, and it also makes it possible to carry through dialysis from salt-precipitated protein to salt-free protein solution in the same closed dialyzing bag. By this means, the risk of infection is reduced, and the volume of the sample is only increased by the amount which corresponds to the dilatation of the bag. Lastly, by rotating the bag, alternating current may be passed through the dialyzing membrane, reducing the significance of the membrane phenomena which threaten the stability of many proteins.