Study on the Extraction Technology of Total Flavonoids From Hawthorn Leaf in Alkaline Conditions

Taking hawthorn leaf as material,based on the different ratio of liquid to solid、pH、extraction temperature、 extraction time,the single factor and orthogonal design experiments were conducted,and the optimal extraction process of total flavonoids from hawthorn leaves was obtained.The results showed that ratio of liqutid to material was 25∶1mL/g,pH was 8.5,extraction temperature was 90℃extracting with 60%ethanol in 3h.Verifing in these conditions,flavonoids extracting reached 7.97mg/g.