Abstract
Hemoglobin was adsorbed on Zn2+ chelating Sepharose 6B but albumin was not adsorbed. Then albumin and hemoglobin could be separated completely by metal chelate affinity chromatography. In a conventional columnwise adsorption step, unusual breakthrough curves were observed because some parts of metal ions could be released from the adsorbent. A combined process with batchwise adsorption and columnwise elution was used to avoid this problem and to shorten the operating time.