FIELD: amino acids. SUBSTANCE: invention relates to method for separation of tyrosine and phenylalanine in an aqueous solution. Method involves cooling solution below 0 C up to complete ice crystallization followed by ice melting at temperature +5 C, nor above, to 75% of ice piece and ice remained after its melting is melted at the same temperature. Precipitated tyrosine is separated from phenylalanine remained in the solution. EFFECT: improved separating method. 1 cl, 2 ex
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