Abstract
The elution pattern of amino acids from columns of ion-exchange resins in various forms has been studied. A sulfonic acid resin in the sodium form, a carboxylic acid resin in the acid form, and quaternary ammonium resin in the chloride form give the most useful separations. Water and 25% alcohol were the solvents employed. Acidic, basic, and neutral non-alpha amino acids were most highly purified. Partial resolution of neutral α-amino acids, β-alanine, and γ-aminobutyric acid and the basic amino acids were obtained on Dowex 1 in the chloride form. These procedures are characterized by relatively high capacity under mild conditions and have been useful in isolation of three nitrogen compounds from plants.
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