FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (20 ): 60-63.doi: 10.7506/spkx1002-6300-200920008

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Decolorization of Stachyose Leached from Chinese Artichoke (Stachys sieboldii Miq.) Tubers

CHEN De-jing1,HAN Hao1,GUO Ting2   

  1. 1. Bio-resources Key Laboratory of Shaanxi Province, Shaanxi University of Technology, Hanzhong 723000, China ;
    2. School of Biological Sciences and Engineering, Shaanxi University of Technology, Hanzhong 723001, China
  • Received:2009-05-13 Online:2009-10-15 Published:2010-12-29
  • Contact: CHEN De-jing1 E-mail:cdjslg@126.com

Abstract:

Stachyose was leached from Chinese artichoke tubers by a sequence of microwave and beating treatments with the addition of water. In order to achieve high decolorization ratio, the resulting supernatant after centrifugation was subjected to clarification with lime and phosphoric acid (for adjusting pH) and ozone treatment, followed by anion exchange adsorption. After condensation and drying, a final product with 77.5% purity was obtained, which was detected by HPLC. The decolorization ratio was as high as 99.4% when 25 min ozone treatment was conducted for decolorizing supernatant of 3 min microwave-treated Chinese artichoke tubers slurry, and the leaching yield and recovery of stachyose were 5.9% and 90.2%, respectively.

Key words: Chinese artichoke, stachyose, decolorization, microwave

CLC Number: