Abstract: Triterpene glucoside was extracted by water as solvent from Siraitia grosvenorii with microwave treatment. The key factors, including the microwave power, microwave irradiation time, the volume of water and the period of extraction, were studied for the extraction yield.. The optimal conditions were identified:microwave power 638W,irradiaton by microwave for 25min,the ratio of liquid to solid 30∶1, the extraction period 2h and the stages of extraction 2. The optimal extraction yield of triterpene glucoside from Siraitia grosvenorii was 90.35%.

Key words: microwave radiation exaraction, Siraitia grosvenorii, triterpene glucoside from Siraitia grosvenorii