Specification Standardization Ginkgo flavone glycosides kaempferol,quercetin,isorhamnetin 24% min. HPLC Terpene lactones ginkgolides A,B,C and bilobalide 6% min. HPLC Ginkgo acid 5ppm max, HPLC Parts used Leaves of Ginkgo Biloba Appearance Light yellowish brown fine powder Particle size 100% through 80 meshes