Methods:Ginkgoic acids gel was prepared by using ginkgolic acids as the main component and carbopol 940 as its base material.HPLC was adopted to control its quality.

• 方法:以银杏酸为主药、卡波普940为基质制备凝胶剂,采用高效液相色谱法测定制剂中银杏酸含量。