Research about flavonoids of ginkgo biloba leaves through solventia extraction

Objective This paper is about the influencing factors of the flavonoid content of ginkgo biloba leaves from solventia extraction. Methods By comparing flavonoid extraction contents from ethanol solventia with different concentration at the same extracting time. Results With the decrease of the ethanol concentration,amount of ginkgo biloba extract,total content of flavonoids extraction yielded gradually increased. Conclusion For flavonoid content of Ginkgo biloba through solvent extraction under the condition of the same time,choice of 20% ethanol concentration is most appropriate.