Objective: To study clarifying for Naoqing Oral Liquid (Radix Puerariae, Radix Astragali, etc.) with chitin instead of ethanol.

• 目的:探讨壳聚糖絮凝法代替乙醇沉淀法用于脑清口服液(葛根,黄芪等)制备的可行性。