Microwave-assisted aqueous two-phase extraction of piceid, resveratrol and emodin from Polygonum cuspidatum by ethanol/ammonium sulphate systems

Published on Aug 6, 2008in Biotechnology Letters1.977
· DOI :10.1007/S10529-008-9815-1
Hui Wang4
Estimated H-index: 4
(DUT: Dalian University of Technology),
Yuesheng Dong6
Estimated H-index: 6
(DUT: Dalian University of Technology),
Zhilong Xiu45
Estimated H-index: 45
(DUT: Dalian University of Technology)
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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