Abstract
Mixtures of alkali metal carboxybenzenesulphonates and their 2-hydroxyethyl and bis(2-hydroxyethyl) esters, obtained by esterification of the carboxybenzene-sulphonates with ethylene glycol at elevated temperatures, were readily separated by chromatography on Sephadex LH-20 gel at pH 8.5 by using potassium dihydrogen orthophosphate-disodium hydrogen orthophosphate buffer as eluent.
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