银杏中微量元素及黄酮含量的测定

Determination of Trace Elements and Ginkgo Flavonoid Content

用原子吸收和原子荧光光度法测定银杏叶、银杏果皮及果仁样品中Fe、Mn、Cu、Zn、As、Se的含量,考察索氏、超声波、冷浸法等不同提取方法对样品中黄酮类化合物的提取率影响,并以荧光光度法测定其总黄酮含量。实验表明,目标元素在样品中的含量存在较大差异,银杏叶中微量元素含量高于果皮果仁;而银杏叶中总黄酮含量为:黄银杏叶>绿银杏叶>银杏果皮>银杏仁。

The trace elements including in Ginkgo biloba leaves,peel and nuts were detected via atomic absorption and atomic fluorescence spectrophotometry. Meanwhile, the extraction rates of flavonoids were studied via Soxhlet extraction, ultrasonic extraction and cold soak method, the total flavonoids were detected over Spectrofluorimetric. It showed that the contents of trace elements in leaves were higher than its peel and nuts.In addition,the descending order of total flavonoid in Ginkgo biloba was yellow Ginkgo biloba leaves,green leaves, peel and nuts.