FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (9): 285-287.

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Study on Extraction Technology of Total Flavonoids from ‘Enwuyemi’ Gynostemma pentaphyllum

TIAN  Guo-Zheng, LIU  Jin-Long, ZHENG  Xiao-Jiang, ZHOU  Guang-Lai, XIE  Liang-Ting   

  1. 1. Key Laboratory of Protection and Utilization for Biological Resources Research of Hubei Province,Institute for Biological Technology,Hubei University for Nationalities,Enshi 445000,China;2. School of Biological Science and Technology,Hubei Institute for Nationalities,Enshi 445000,China
  • Online:2008-09-15 Published:2011-12-08

Abstract: Effects of ethanol concenttration, temperature, material-solution ratio and extraction time on extraction rate of total flavonoids from ‘Enwuyemi’Gynostemma pentaphyllum were studied, and the extraction technology was optimized by orthogonal test L9(34). The results showed that the optimal extraction conditions are ethanol concenttration 70%, material-solution ratio 1:10, water bath temperature 90 ℃ and extraction time 1 h. Under the conditions, the extraction rate of total flavonoids is 4.1%.

Key words: &lsquo, Enwuyemi&rsquo, Gynostemma pentaphyllum; total flavonoids; extraction technology; optimization;