核心参数
产地类别: 进口
DE高速逆流色谱DE Spectrum HPCCC的工作原理介绍
高速逆流色谱DE Spectrum HPCCC的使用方法?
DEDE Spectrum HPCCC多少钱一台?
高速逆流色谱DE Spectrum HPCCC可以检测什么?
高速逆流色谱DE Spectrum HPCCC使用的注意事项?
DEDE Spectrum HPCCC的说明书有吗?
DE高速逆流色谱DE Spectrum HPCCC的操作规程有吗?
DE高速逆流色谱DE Spectrum HPCCC报价含票含运吗?
DEDE Spectrum HPCCC有现货吗?
更多
更多
应用高效逆流色谱技术一次分离两类顺反异构体
Four flavonoids, isoastilbin, astilbin, isoengelitin, and engelitin were isolated and purified simultaneously from Smilacis Glabrae Roxb. for the first time by high performance counter-current chromatography using a system consisting of n-hexane–n-butanol–water (1:2:3, v/v/v). A total of 392.6 mg of astilbin, 71.4 mg of isoastilbin, 47.4 mg of engelitin, and 10.3 mg of isoengelitin were purified from 1.89 g of the ethyl acetate extract of Smilacis Glabrae Roxb. in six runs, each at over 94.51% purity as determined by HPLC. The structures of the four compounds were identified by their retention time, the LC-ESI-MSn in the negative ion mode, and confirmed by 1H-NMR experiments. The characteristic LC-ESI-MS fragmentation patterns of the four compounds were discussed.
石油/化工
2013/06/28
弗士达仪器
公司地址
大连市高新区黄浦路782号海外学子产业园041181134118
客服电话