FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (8): 106-109.doi: 10.7506/spkx1002-6300-201008023

• Technology Application • Previous Articles     Next Articles

Orthogonal Array Design for Pigment Extraction from Black Sticky Rice

LIU Jing-jing,DUAN Ling-ling,WANG Xue-feng,HAN Yao-ping   

  1. Department of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, China
  • Received:2009-07-22 Revised:2009-11-05 Online:2010-04-15 Published:2010-12-29
  • Contact: LIU Jing-jing E-mail:liujingjing971@163.com

Abstract:

The optimal ethanol extraction of black sticky rice pigment was determined by examining the effects of extraction temperature and time, ethanol concentration, pH and material/liquid ratio on black sticky rice pigment yield (represented by the absorbance at 525 nm wavelength) by single factor and orthogonal array design methods. Results showed that the optimal values of the above parameters were as follows: extracting temperature 65 ℃, ethanol concentration 75%, material/liquid ratio 1:110 and pH 1 for an extraction duration of 3 h.

Key words: black sticky rice, pigment, extraction

CLC Number: