請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/71276
標題: Ethanol modified supercritical fluids extraction of scopoletin and artemisinin from Artemisia annua L
作者: Tzeng, T.C.
Lin, Y.L.
Jong, T.T.
Chang, C.M.J.
關鍵字: Artemisia annua L.
artemisinin
scopoletin
supercritical carbon
dioxide
column purification
carbon-dioxide
qinghaosu
decomposition
flavonoids
roots
期刊/報告no:: Separation and Purification Technology, Volume 56, Issue 1, Page(s) 18-24.
摘要: This work studied the supercritical carbon dioxide (SC-CO2) extractions with adding 16.25% ethyl alcohol as a co-solvent to obtain scopoletin and artemisinin from Artemisia annua L. A two-factor central composite experimental design was adopted to determine the optimal operation conditions in extracting the maximal amount of these bioactive compounds. Experimental results indicated that the 289 mu g of scopoletin/g of the feed in dry basis and the 11.6 mg of artemisinin/g of the feed had been obtained at these optimal conditions. Two hours ethanol modified SC-CO2 extractions were superior to 16 h Soxhlet N-hexane extractions in producing more pure artemisinin and scopoletin and the amount of the extracts increased with the density of SC-CO2. A normal phase silica-gel column chromatography to purify artemisinin from the SC-CO2 extract presented that the purity of artemisinin attained 98.2% but with a low recovery of 54.4%. This reduced recovery may be caused by an occurrence of the bridging peroxide atoms of artemisinin reacted with silica-gel molecules during the column purification. (c) 2007 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/71276
ISSN: 1383-5866
文章連結: http://dx.doi.org/10.1016/j.seppur.2007.01.010
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