Microwave-assisted aqueous two-phase extraction of piceid, resveratrol and emodin from Polygonum cuspidatum by ethanol/ammonium sulphate systems |
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Authors: | Hui Wang Yuesheng Dong Zhi-Long Xiu |
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Institution: | (1) Department of Bioscience and Biotechnology, School of Environmental and Biological Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian, 116024, People’s Republic of China |
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Abstract: | Microwave-assisted, aqueous two-phase extraction was investigated to obtain effective constituents, including piceid, resveratrol
and emodin in Polygonum cuspidatum. An aqueous two-phase system consisting of 25% (w/w) ethanol 21% (w/w) (NH4)2SO4 gave equal yields of piceid, and 1.1- and 1.9-times higher yields of resveratrol and emodin, respectively, than that achieved
by microwave-assisted extraction and heat reflux extraction. Three-separate operations, extraction, clarification and concentration,
are hereby integrated into a single step to get higher yields at lower cost. This is therefore a potentially useful method
for the extraction and purification of target products. |
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Keywords: | Emodin Ethanol/ammonium sulphate Microwave-assisted aqueous two-phase extraction Piceid Polygonum cuspidatum Resveratrol |
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