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《Chemical Research and Application》 2011-01
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Extraction and antioxidaion of dihydroquercetin

LIU Yan,WANG Sui(College of Chemistry and Chemical Engineering,Harbin Normal University,Harbin 150025,China)  
Dihydroquercetin was extracted from larch with water and acetone-water as extracting solvent respectively.The optimum extracting condition was obtained through the orthogonal experiment design L9(34).The antioxidant activity of the dihydro-quercetin in different fats was evaluated.The antioxidant synergy of Vc,BHT,EDTA and citric acid on dihydro quercetin was compared.Results indicated that the optimal conditions of water soaking was as follows: extraction temperature was 90℃,liquid ratio was 1∶12(g/mL),extraction time was 120 min.The optimal conditions of acetone-water soaking was as follows: the concentration of acetone was 60%(V/V)%,liquid ratio was 1∶14(g/mL),extraction time was 4 h.The extraction rate of soxhlet extraction by acetone-water was higher than that by water.The suitable amount of lard and soybean were added as extraction agent were 0.04%(m/m)% and 0.06%(m/m)% respectively.The synergized action of Vc was the best in the four synergistic agent.
【Fund】: 黑龙江省自然科学基金(B2009-04)资助项目
【CateGory Index】: TQ461
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