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Adsorption behaviors of the histidine-containing dipeptides, carnosine (Car) and anserine (Ans) were studied using copper (II) immobilized cation exchange resins. Commercial sulfonic acid, carboxylic acid, iminodiacetic acid (IDA), and aminophosphoric acid resins were used for immobilizing copper (II) . Adsorptions of Car and Ans were especially enhanced using copper (II) immobilized IDA resin (Cu-IDA) . Car and Ans were adsorbed on Cu-IDA even in the presence of 100 mmol/dm3 of sodium chloride. Histidine and the histidine-containing dipeptides were selectively adsorbed on Cu-IDA over other amino acids. Immobilized metal affinity adsorption is available for separation of the dipeptides from saline water.

Adsorption Behavior of Carnosine and Anserine on Copper(II) Immobilized Cation Exchange Resins