| abstract |
The invention provides a ginkgo leaf flavonoid extract and a preparation method and a characteristic map construction method thereof. The medicinal components of the ginkgo leaf flavonoid extract are composed of the following parts: myricetin-3-O-rutum content of 3% to 6% (w /w), myricetin-3-O-glucose 3%～6% (w/w), rutin 8%～11% (w/w), marigoldin-3-O-rutose 5%～7 %(w/w), quercetin-3-O-rut 5%～7% (w/w), kaempferol-3-O-rut 6%～9% (w/w), iso Rhamnetin-3-O-rutose 6%-10% (w/w), quercitrin-2"-(6"-p-cinnamoyl glucosyl) 13%-15% (w/w), Kaempferol-3-(6"'-p-cinnamonylglucosyl-rhamnoside) 11%～15% (w/w). The flavonoid extract is obtained by twice separation of ginkgo biloba extract through polyamide column It can be used as an antioxidant in food, medicine and health care products. The invention solves the problem that the effect components of the ginkgo biloba flavonoid extract are unknown, reduces the difficulty of quality control, and the established ultra-high performance liquid phase characteristic map has specificity for quality detection. |