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Chemistry and Industry of Forest Products ›› 2014, Vol. 34 ›› Issue (3): 85-91.doi: 10.3969/j.issn.0253-2417.2014.03.015

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Optimization of Microwave-assisted Extraction of Total Flavonoids from Matured Leaf Hawk Tea by Response Surface Methodology and Its Antioxidant Activity

JIA Xue-jing1, LI Le1, DING Chun-bang1, DU Lei2, YUAN Shu3, YUAN Ming1   

  1. 1. College of Biology and Science, Sichuan Agricultural University, Ya'an 625014, China;
    2. Test and Inspection Center for Agricultural Products Quality, Ya'an Agriculture Bureau, Ya'an 625014, China;
    3. College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China
  • Received:2013-05-06 Online:2014-06-25 Published:2014-06-25

Abstract: The optimal microwave-assisted extraction conditions of total flavonoids from matured leaf Hawk tea were studied. In order to increase the extraction yield of total flavonoids, the microwave-assisted extraction conditions of total flavonoids from matured leaf Hawk tea were optimized by response surface methodology based on the single-factor tests. Meanwhile, the antioxidant activity of total flavonoids from matured leaf Hawk tea was evaluated by the DPPH radical scavenging capacity and ferric reducing activity power. The optimal parameters of total flavonoids were matured leaf Hawk tea 1 g, microwave time 61 s, microwave power 560 W, ratio of water to solid 10:1 (mL:g), ethanol concentration 80.3%. The maximum extraction yield of total flavonoids was 6.52%. At 20 g/L, DPPH radical scavenging activity and FRAP value of extracted total flavonoids were 66.66% and 2.05 mmol/L FeSO4, respectively. They all showed a dose-dependent manner.

Key words: Hawk tea, microwave-assisted extraction, response surface methodology, total flavonoids

CLC Number: