Method of study on Extraction of Resveratrol from Polygonum Cuspidatum by Alkali
LI Baoli
WANG Fang
PENG Hongyan
Abstract：The method of the extraction and separation of resveratrol with alkali solution has been studied in this experiment, in which we have adjusted the pH value by hydrochloric acid to precipitate. The effects of the raw material granularity, kind and dosage of alkali, acid dosage and the time of soaking have been studied in this ex-periment by single factor. The optimum conditions of resveratrol alkali extraction and acid precipitation were as follows:filtering the raw material through the 40 mesh sieve, regulating the distilled water to pH 10 with KOH, soaking the material for 10 hours, boiled it l h under a constant rate and even agitation stir, finally regulating the filtered liquid to pH 3 by 1 mol/L hydrochloric acid, and precipitation. The crude extract really contains resvera?trol after detected by UV and IR spectrum. It has been demonstrated that it is a good technique with simple pro?cess and a safe operation, so it is an effective separation method.
Keywords：resveratrolpolygonum cuspidatumalkali extractacid precipitate
Publication Date：2015-11-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 22-25 )