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Abstract
Various modifications of the circular paper chromatographic method for the quantitative determination of amino acids in protein hydrolysates have been investigated. With the system n-butanol -20butanone-water-ammonia (5:3:I:1:) six groups are obtained. Two groups are separated into their individual components with the system lutidine-water, three others wth tert-butanol- formic acid-water (75:0.8:24.2). Threoninc appears as a single band. Lenght of the run is increased and separation is improved by dividing the paper into triangular segments and by putting the starting point near the periphery.
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