Provided a method of producing a purified hyaluronic acid type which comprises adding a water-soluble organic medium to a solution which comprises a hyaluronic acid type having an average molecular weight of 400 to 100, 000 and has a pH of 3 or less to obtain a suspension, and adjusting a pH of the suspension in a range of 3.5 to 8 toprecipitate a purified hyaluronic acid type.
本发明提供了一种生产纯化透明质酸类型的方法,该方法包括将一种
水溶性有机介质添加到一种溶液中,该溶液包含平均分子量为 400 至 100 000、pH 值为 3 或更低的透明质酸类型,从而获得一种悬浮液,并将悬浮液的 pH 值调节在 3.5 至 8 的范围内,以沉淀纯化透明质酸类型。