HPLC法测定银杏叶中6种黄酮成分的含量

用反相高效液相色谱法测定了银杏叶中6种黄酮成分即槲皮素(quercetin)、异鼠李素(isorhamnetin)、山萘酚(kaempferol)、白果黄素(bilobetin)、银杏黄素(ginkgetin)、西阿多黄素(sciadopitysin)。单酚酸B(salvianolic acid B)为内标。并对18个样品进行了测定。色谱柱为Zorbax ODS柱,流动相:A.MeOH,B.THF—H₂O—HCOOH(34∶65∶1),梯度洗脱。流速:1.0ml·min^-1,检测波长:350nm。线性范围0.10～257μg,相关系数γ=0.9994～0.9998,回收率98.0%～102.0%。本法准确、快速、重现性好,为生产及工艺研究提供质量控制依据。

HPLC DETERMINATION OF SIX FLAVONOID CONSTITUENTS IN GINKGO BILOBA LEAVES

Six flavonoid constituents (quercetin, isorhamnetin, kaempferol, bilobetin, ginkgetin and sciadopitysin) were isolated from Ginkgo biloba leaves and determined by reversed phase HPLC using salvianolic acid B as internal standard. The column employed was Zorbax ODS (150 mm x 4 mm ID, 5 microns). The mobile phase consisted of solvent A (methanol) and solvent B tetrahydrofuran--water--formic acid (34:65:1)] for gradient elution. The flow rate was 1 ml.min-1 and detection was effected at 350 nm. This method is accurate, rapid and reproducible. Analytical data for various samples were given.