FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (12): 133-138.doi: 10.7506/spkx1002-6630-201112030

• Processing Technology • Previous Articles     Next Articles

Separation and Purification of Flavonoids from Onion Peel by Macroporous Resin Adsorption

XU Huai-de1,CHEN Jia1,*,BAO Rong2,LIU Kun1,LI Jin1   

  1. 1. College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; 2. College of Forestry, Northwest A&F University, Yangling 712100, China
  • Online:2011-06-25 Published:2011-06-10

Abstract: The characteristics of adsorption and desorption of onion peel flavonoids on six kinds of macroporous resins were compared. Static adsorption and desorption experiments indicated that X-5 resin was the best resin for the separation and purification of flavonoids from onion peel. The optimal process parameters for purifying onion peel flavonoids with X-5 resin were sample loading flow rate of 0.5 mg/mL, sample pH 5.0 and 50 mL of 80% ethanol of as eluent at a flow rate of 1.0 mL/min. After the purification, the purity of flavonoids from onion peel was increased from 7.95% to 80.78% and could reach up to 94.5% after further triple recrystallization. The developed method is simple and feasible for industrialization.

Key words: macroporous adsorption resin, separation, purification, onion peel, flavonoids

CLC Number: