Process for producing highly purified HCG

摘要

Crude HCG is purified by extracting with a neutral or weakly basic aqueous solution containing lower aliphatic alcohol and soluble salt, adding lower aliphatic alcohol to the extracted solution to form precipitates and the precipitates containing high purity of HCG are collected. This precipitates can be further purified by dissolving in a buffer solution, contacting the solution with a weak anion exchanger and eluting the exchanger with said buffer solution containing added salt.