FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (16 ): 115-118.doi: 10.7506/spkx1002-6630-200916020

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Optimization of Water Extraction of Cochineal Dye

ZHANG Hong1,LU Yan-min1,2,ZHENG Hua1,ZHOU Mei-cun2,FENG Ying1, CHEN Xiao-ming1,*,ZHANG Zhong-he1   

  1. 1. Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, China;
    2. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650224, China
  • Received:2009-05-20 Online:2009-08-15 Published:2010-12-29
  • Contact: CHEN Xiao-ming E-mail:cafcxm@tom.com

Abstract:

The effects of extraction temperature, extraction time and ratio of raw material to liquid on the extraction of cochineal dye were investigated by single-factor method. Subsequently, these factors were optimized by orthogonal array design. The optimal conditions for the maximum extraction of cochineal dye were determined as follows: with the ratio of raw material to liquid of 1:4 (m/V), extraction temperature 80 ℃ for an extraction duration of 5 h, and extraction number 6. Under these conditions, the yield of red dye was 41.89%, and its purity was 32.15%.

Key words: water extraction method, cochineal dye, extraction, carminic acid

CLC Number: