METHOD FOR EXTRACTING TOTAL FLAVONOIDS FROM LYCIUM CHINESE LEAVES

The present invention discloses a method for extracting total flavonoids from Lycium Chinese 5 leaves and belongs to the field of extraction of active ingredients of natural herbs. A product obtained through extraction, concentration, separation, purification and drying with Lycium Chinese leaves as raw material contains rutin, quercetin, kaempferol and isorhamnetin. A preparation has the good effects of resisting free radicals, oxidation and ageing, reducing blood lipid and the like and can be widely applied to functional food and medical health-care products. 10 In the preparation process, alcohol serves as an extraction solvent and an eluent, and macroporous adsorption resin serves as a separation material. In the present invention, the used solvent is safe and nontoxic, and low in cost and may be recycled and reused. The production process is safe, simple and convenient, does not produce pollution to an environment, is liable to control and suitable for large-scale industrial production and also has the characteristics of high 15 extraction rate of flavone and high purity.