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Indexed by:期刊论文

Date of Publication:2008-12-01

Journal:BIOTECHNOLOGY LETTERS

Included Journals:SCIE、EI、PubMed、Scopus

Volume:30

Issue:12

Page Number:2079-2084

ISSN No.:0141-5492

Key Words:Emodin; Ethanol/ammonium sulphate; Microwave-assisted aqueous two-phase extraction; Piceid; Polygonum cuspidatum; Resveratrol

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) (NH(4))(2)SO(4) 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.