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林产化学与工业 ›› 2014, Vol. 34 ›› Issue (3): 85-91.doi: 10.3969/j.issn.0253-2417.2014.03.015

• 研究报告 • 上一篇    下一篇

响应面法优化微波辅助提取成熟叶老鹰茶总黄酮及其抗氧化研究

贾学静1, 李乐1, 丁春邦1, 杜蕾2, 袁澍3, 袁明1   

  1. 1. 四川农业大学 生命科学与理学院, 四川 雅安 625014;
    2. 雅安市农业局农产品质量检测中心, 四川 雅安 625014;
    3. 四川农业大学 资源环境学院, 四川 成都 611130
  • 收稿日期:2013-05-06 出版日期:2014-06-25 发布日期:2014-06-25
  • 通讯作者: 袁明,副教授,硕士生导师,研究领域为食品化学;E-mail:yuanmingsicau@126.com。 E-mail:yuanmingsicau@126.com
  • 作者简介:贾学静(1988- ),男,四川广元人,硕士,主要从事食品化学研究工作
  • 基金资助:
    四川省教育厅青年基金项目(11ZB054)

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

摘要: 以成熟叶老鹰茶为原料,在单因素试验的基础上,以总黄酮得率为指标,采用响应面法优化微波辅助提取其总黄酮的最佳工艺条件,并通过老鹰茶总黄酮对1,1-二苯基苦基苯肼自由基(DPPH·)的清除和铁离子还原能力(FRAP)来评价其抗氧化能力。结果表明,经过优化后的工艺参数为:成熟叶老鹰茶1 g微波时间 61 s,微波功率 560 W,液料比10:1(mL:g),乙醇体积分数80.3%,此条件下总黄酮得率为 6.52%。成熟叶老鹰茶总黄酮具有较强的DPPH·清除和铁离子还原能力,质量浓度 20 g/L 时,DPPH·清除率66.66%,铁离子还原能力相当于2.05 mmol/L FeSO4,并呈一定的量效关系。

关键词: 老鹰茶, 微波辅助, 响应面优化, 总黄酮

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

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