Chen Hua-Sheng, Ren Li, Xu Ai-Hua, Lu Ping
Yangzhou University, College of Medicine, Yangzhou 225001, China.
Zhong Yao Cai. 2006 Nov;29(11):1139-41.
To determine the suitable tree's age, tree's sex and gathering seasons for Ginkgo biloba leaves.
The twelve different polysaccharides were obtained by extracting and precipitating from Ginkgo biloba leaves and to see if there were differences among them. The concentration of Ginkgo biloba leaf polysaccharides with the highest gain ratio will be determined by HPLC.
The average gain ratio of Ginkgo biloba leaf polysaccharides was 4.29%, among them the gain ratio of 10-years old female Ginkgo biloba leaf collected in the last ten days of September was the highests, its polysaccharides concentration was 61.5% with RSD = 2.5% (n = 6).
The gain ratios were different in different Ginkgo biloba leaves and the changing rules provide scientific basis for the GAP of medicinal plants.
确定银杏叶适宜的树龄、树的性别及采收季节。
从银杏叶中提取并沉淀得到12种不同的多糖，观察它们之间是否存在差异。采用高效液相色谱法测定得率最高的银杏叶多糖的浓度。
银杏叶多糖的平均得率为4.29%，其中9月下旬采集的10年生雌性银杏叶的得率最高，其多糖浓度为61.5%，相对标准偏差（RSD）=2.5%（n = 6）。
不同银杏叶的得率不同，其变化规律为药用植物的良好农业规范（GAP）提供了科学依据。
