Ultrasonic extraction was used to extract the gypenosides from fresh leaves sample(F), fixed sample(X),baked sample(B), air-dried sample(A) and dry tea sample(D) of Gynostemma pentaphyllum.

• 用超声法提取绞股蓝鲜叶样、杀青样、烘干样、风干样以及绞股蓝袋泡茶干茶样的总皂甙,并测定其含量。