H Wang1, G B Zhao, S Q Liu, J H Zheng. 1. School of Pharmaceutical Sciences, Beijing Medical University, Beijing 100083, China.
Abstract
OBJECTIVE: To compare the contents of flavonoids in the leaves of Ginkgo biloba gathered from 35 producing areas. METHODS: Separating and determining 3 flavonoid aglycones, quercetin, kaempferol and isorhamnetin, by high performance liquid chromatography, and there by calculating the total contents of flavonoids. RESULTS: The contents of flavonoids in the leaves of G. biloba gathered from different producing areas are different, but in those gathered from Pizhou, Zheng'an Xing'an, Anlu, etc. appear higher.
OBJECTIVE: To compare the contents of flavonoids in the leaves of Ginkgo biloba gathered from 35 producing areas. METHODS: Separating and determining 3 flavonoid aglycones, quercetin, kaempferol and isorhamnetin, by high performance liquid chromatography, and there by calculating the total contents of flavonoids. RESULTS: The contents of flavonoids in the leaves of G. biloba gathered from different producing areas are different, but in those gathered from Pizhou, Zheng'an Xing'an, Anlu, etc. appear higher.