The use of sodium sulphate for the preparation of concentrated protein-free tissue extracts

Abstract

SODIUM sulphate has been used as an alternative to ammonium sulphate for the precipitation of proteins since the last century, and its special advantages were exploited by Pinkus [1901], who drew attention to the importance of the facts that this salt is relatively insoluble at 00, and that it crystallizes as a decahydrate. But these properties, which Pinkus utilized for the purification of proteins, lend themselves more directly to the isolation of non-protein substances contained in protein solutions or in tissues [M. G. & P. Eggleton, 1932].