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http://dx.doi.org/10.5806/AST.2009.22.3.219

Primary study of sterols composition of Rhodiola sachalinensis by using GC/MS  

Jin, Yinzhe (Department of Chemical Engineering, Inha University)
Li, Xifeng (Key Laboratory of Nature Resource and Functional Molecular of the Changbai Mountain, Ministry of Education)
Li, Donghao (Key Laboratory of Nature Resource and Functional Molecular of the Changbai Mountain, Ministry of Education)
Row, Kyung Ho (Department of Chemical Engineering, Inha University)
Publication Information
Analytical Science and Technology / v.22, no.3, 2009 , pp. 219-227 More about this Journal
Abstract
The steroid compounds in Rhodiola sachalinensis were determined with adsorption column chromatographic purification and GC/MS. Sterols were extracted by sonication and Soxhlet with ethanol and dichloromethane, respectively. The extract was partitioned with chloroform and water using liquid-liquid extraction, and purified with a silica column after the sterols had been converted to the corresponding silyl derivatives with BSTFA. Eighteen free sterols, including $\beta$-sitosterol, stigmasterol and cycloartenol, and nine sterol conjugates were found from Rhodiola sachalinensis by GC/MS. Among them, cholest-5-ene-3-ol, cholesterol, stigmasterol, $\beta$-sitosterol were confirmed and quantified with sterol standards. Most sterols were presented in the chloroform part, with $C_{29}$ being the most abundant group in this sterol group. $\beta$-sitosterol was the most abundant compound with a relative content of 45.94% followed by ergost-7-ene-3-ol (11.33%), 4,14-dimethyl-ergosta-8,24(28)-diene-3-ol (7.07%), stigmasterol (6.09%), cycloartenol (5.43%) and 4-methyl-cholest-5-ene-3-ol (5.39%).
Keywords
Rhodiola sachalinensis; Sterols; Derivatives; Sonication; Soxhlet; GC/MS;
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