FOOD SCIENCE ›› 2012, Vol. 33 ›› Issue (6): 127-131.doi: 10.7506/spkx1002-6630-201206028

• Processing Technology • Previous Articles     Next Articles

Using Macroporous Resin AB-8 for Pigment Removal from Onion Polysaccharides

XU Huai-de1,LI Jin1,LI Yu-jin2,CHEN Jia1,TAO Hong1   

  1. (1. College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; 2. Ocean Food Nutrition Research Institute of Shandong Taixiang Group, Rongcheng 264309, China)
  • Online:2012-03-25 Published:2012-03-03

Abstract: The removal of pigments from crude polysaccharides from yellow skin onion was investigated. AB-8 was found to be the best adsorbent for pigments in yellow skin among 8 types of macroporous adsorption resin tested. The removal rate of pigments was 86.71% and the retention rate of polysaccharides when 20 mL of 2792.5 mg/L crude polysaccharide solution at pH 5.0 and 40 ℃ was made to flow through 1 g of AB-8 column at a velocity of 2792.5 mg/L. In conclusion, the resin is suitable for the decolorization of polyssacharides from yellow skin onion.

Key words: onion polysaccharides, macroporous adsorption resin, decolorization

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