FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (12): 156-159.doi: 10.7506/spkx1002-6630-201112034

• Processing Technology • Previous Articles     Next Articles

Purification of Duck-blood Glutinous Rice Pigment by Macroporous Resin Adsorption

LIU Jing-jing,LIU Jin-qian,WANG Xue-feng,HAN Yao-ping   

  1. Department of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, China
  • Online:2011-06-25 Published:2011-06-10

Abstract: The objective of this work to purify the crude pigment extracted from duck-blood glutinous rice by macroporous resin adsorption. Five types of macroporous resin were comparatively tested for their adsorption and desorption performance towards duck-blood glutinous rice pigment, and resin NKA-9 was considered best for purifying duck-blood glutinous rice pigment. Further, the effects of sample concentration, pH and loading flow rate and desorption flow rate on the adsorption and desorption rates of resin NKA-9 were investigated, and the results showed that the optimal purification parameters for duck-blood glutinous rice pigment was sample pH 1.0, sample loading flow rate of 1 mL/min, sample concentration of 1.0 mg/mL and desorption with 5 BV of 70% ethanol at a flow rate of 1.0 mL/min. In conclusion, NKA-9 resin is suitable to purify duck-blood glutinous rice pigment due to its advantages of large adsorption capacity, easy desorption and high resolution.

Key words: duck-blood glutinous rice, pigment, macroporous resin, purification

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