Ma Xia Q, Shi Q, Duan J A, Dong Tina T X, Tsim Karl W K
Department of Biology and Biotechnology Research Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
J Agric Food Chem. 2002 Aug 14;50(17):4861-6. doi: 10.1021/jf0202279.
Radix Astragali (root of Astragalus; Huangqi) is a popular traditional Chinese medicine, and Astragalus membranaceus and A. membranaceus var. mongolicus are two commonly used species; however, there are many Astragalus species that could act as adulterants of Radix Astragali. To find the chemical composition of Radix Astragali, the main constituents including flavonoids, saponins, polysaccharides, amino acids, and trace elements were determined in two Radices Astragali, A. membranaceus and A. membranaceus var. mongolicus, and its eight adulterants, Astragalus propinquus, Astragalus lepsensis, Astragalus aksuensis, Astragalus hoantchy, Astragalus hoantchy subsp. dshimensis, Astragalus lehmannianus, Astragalus sieversianus, and Astragalus austrosibiricus. The results showed that the amounts of main constituents such as isoflavonoids and astragalosides varied in different species. In distinction, A. membranaceus and A. membranaceus var. mongolicus contained a higher amount of astragaloside I and IV. In addition, the main constituents of A. membranaceus var.mongholicus changed according to seasonal variation and age of the plant. The chemical composition of different species of Astragalus would provide useful information for the quality control of Radix Astragali.
黄芪是一种常用的传统中药，膜荚黄芪和蒙古黄芪是两种常用的品种；然而，有许多黄芪属物种可能充当黄芪的掺假品。为了探究黄芪的化学成分，对两种黄芪（膜荚黄芪和蒙古黄芪）及其八种掺假品（库伦黄芪、长荚黄芪、阿克苏黄芪、贺兰山黄芪、贺兰山黄芪深裂亚种、胀萼黄芪、西疆黄芪和西伯利亚黄芪）中的主要成分，包括黄酮类、皂苷类、多糖类、氨基酸和微量元素进行了测定。结果表明，不同物种中异黄酮和黄芪皂苷等主要成分的含量各不相同。不同的是，膜荚黄芪和蒙古黄芪中黄芪苷I和IV的含量较高。此外，蒙古黄芪的主要成分会随着季节变化和植株年龄而改变。黄芪不同物种的化学成分将为黄芪的质量控制提供有用信息。
