Methods The baicalin,extracted by microwave,purified with acid,ultrafilter and macroporous resin respectively,and the purity of baicalin were quantitatively determined with HPLC.

• 方法黄芩经微波提取后,分别用酸沉法、超滤法、大孔树脂法三种方法进行分离纯化,并用HPLC对黄芩苷进行定量测定。