Extraction Process of Flavones From Houttuynia cordata Thunb by Enzymiatc Treatment

Houttuynia cordata Thunb is a plant of Chinese traditional medicine that it is often both food and drug.There are plenty of flavones in it.An extraction technology of flavones from Houttuynia cordata Thunb was studied in this paper.When the crude was pretreated with the cellulase before extraction,the extraction rate of total flavones was up to 81.82 mg/g.The optimum extraction conditions were as following:concentration of enzyme in the liquor is 0.2 mg/mL,enzymatic treatment temperature 45 ℃,enzymatic treatment time 90 min,pH=5.0.The extraction rate of total flavones was improved significantly.