The salting-out of amino-acids from protein hydrolysates. A method for the isolation of l-phenylalanine

Abstract
Curves are given showing the solubility of 1-phenylalanine in water and in water saturated with NaCl at varying pH. A method involving the use of picrolonic acid for the isolation of phenylalanine from protein hydrolysates is described. Zein contains 2.65% phenylalanine, casein 1.7%. 1-Methionine picrolonate melts at 178-180[degree] after softening at 174[degree].