Preparative isolation and purification of hydroxyanthraquinones from Rheum tanguticum Maxim. on normal phase silica gel: using a Flash Master Personal system |
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| Authors: | Zhang Yong-Zhi Lu Yan-Hua Wei Dong-Zhi Chou Gui-Xin Zhu En-Yuan |
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| Institution: | State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai. PR China. |
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| Abstract: | A flash chromatography method for preparative separation and purification of five hydroxyanthraquinones from the Chinese medicinal herb Rheum tanguticum Maxim. ex Balf. was developed by using Flash Master Personal(+) systems. The purities of the products, chrysophanol, physcion, emodin, aloe-emodin, and rhein were all over 90%, determined by high performance liquid chromatography (HPLC). Their structures were ascertained by EI-MS, (1)H- and (13)C-NMR data, and by co-TLC and HPLC with the authentic samples available in our laboratory. |
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