Liang Shu-xuan, Sun Han-wen
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Oct;22(5):847-9.
Method for the determination of nutritional elements in three kinds of chinese traditional and herbal drugs including leaves of Ginkgo biloba L., Eucommiales, and Gynostemma pentaphyllum (Thunb.) Makino were studied. Samples were collected in middle of autumn, washed in water and dried by airing. About 0.5 g accurately weighed sample was digested with mixed acid of HNO3-HClO4 (4:1). Six kinds of elements of selenium, germanium, copper, zinc, iron and manganese in the digested solution were determined by graphite furnace atomic absorption spectrometry (GFAAS) respectively. Accuracy of employed AAS method was tested by the determination of Cu, Zn, Fe, Mn in standard material of peach leaves. The results obtained show proposed GFAAS method is simple, accuracy, rapid and practicable. The contents of Cu, Zn, Fe, Mn in these plant leaves are high. Especially Se in Ginkgo biloba L. and Ge in Gynostemma pentaphyllum (Thunb.) Makino were obviously higher than other herbal drugs. They are worth much more comprehensive utilization. The relation between concentrations of these nutritional elements and curative effect was also discussed.
研究了测定银杏叶、杜仲叶和绞股蓝三种中草药中营养元素的方法。样品于中秋时节采集，水洗后晾干。准确称取约0.5g样品，用硝酸 - 高氯酸（4:1）混合酸进行消化。消化液中的硒、锗、铜、锌、铁和锰六种元素分别用石墨炉原子吸收光谱法（GFAAS）测定。通过测定桃叶标准物质中的铜、锌、铁、锰来检验所采用原子吸收光谱法的准确性。结果表明，所提出的石墨炉原子吸收光谱法简便、准确、快速且实用。这些植物叶片中铜、锌、铁、锰的含量较高。尤其是银杏叶中的硒和绞股蓝中的锗明显高于其他草药。它们更值得综合利用。还讨论了这些营养元素浓度与疗效之间的关系。
