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林产化学与工业 ›› 2014, Vol. 34 ›› Issue (4): 131-136.doi: 10.3969/j.issn.0253-2417.2014.04.023

• 研究报告 • 上一篇    下一篇

银杏叶总黄酮的微波提取及生物利用度研究

徐春明, 王英英, 李婷, 庞高阳, 李丹   

  1. 北京工商大学 食品学院;食品添加剂与配料北京高校工程研究中心; 北京市食品风味化学重点实验室, 北京 100048
  • 收稿日期:2013-08-21 出版日期:2014-08-25 发布日期:2015-08-18
  • 作者简介:徐春明(1978-),男,山东临清人,副教授,博士,研究方向为食品与生物化工;E-mail:xucm78@163.com。
  • 基金资助:
    北京市食品学科特色教学科研创新平台建设项目(PXM2012-014213-000063)

Microwave-assisted Extraction and Bioavailability of Flavonoids from Ginkgo Leaves

XU Chun-ming, WANG Ying-ying, LI Ting, PANG Gao-yang, LI Dan   

  1. School of Food and Chemical Engineering, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
  • Received:2013-08-21 Online:2014-08-25 Published:2015-08-18

摘要: 利用微波法提取银杏叶总黄酮,在单因素试验的基础上,采用正交试验对提取工艺进行了优化研究,并经过体外模拟胃肠消化对银杏叶总黄酮进行了生物利用度分析,并用红外光谱和扫描电镜对消化前后的银杏叶总黄酮进行了比较分析。结果表明,1 g 银杏叶干粉银杏叶总黄酮的最佳提取工艺是:液料比25:1(mL:g),乙醇体积分数 70%,微波功率 300 W,微波时间 60 s,在该条件下银杏叶总黄酮的提取得率为 2.698%。在胃肠消化过程中,银杏叶中的总黄酮被释放,并能被胃肠消化分解进而被人体吸收;红外光谱分析表明,银杏叶样品粉末在胃肠消化过程中总黄酮被消化分解,含量降低;扫描电镜结果表明,消化前后两种样品的结构有很大的不同,说明胃肠消化使样品的细胞壁结构发生了改变。

关键词: 银杏叶, 总黄酮, 微波提取, 生物利用度, 红外光谱, 扫描电子显微镜

Abstract: On the basis of single factor test, the orthogonal design was employed to optimize microwave-assisted extraction of total flavonoids from ginkgo leaves. The bioavailability of flavonoids from ginkgo leaves was analyzed using gastrointestinal digestive process imitated in vitro. Ginkgo leaves and digested ginkgo leaves were compared using IR spectra and scanning electron microscopy. The results indicated that the highest extraction yield of flavonoids by microwave-assisted extraction could reach 2.698% using liquid to ethanol concentration of 70% as solvent, ratio of liquid to solid 25:1 (mL:g) and microwave power of 300 W for 60 s. During gastrointestinal digestion, the flavonoids in ginkgo were released, and can be digested and decomposed, then absorbed by human body. Infrared spectrum analysis showed that flavonoids from ginkgo leaves were digested during gastrointestinal digestion process, and its content was decreased. Scanning electron microscopy (SEM) results showed that the structure of samples before and after digestion was very different, and the gastrointestinal digestion changed the cell wall structure of sample.

Key words: ginkgo leaf, flavonoids, microwave-assisted extraction, bioavailability, infrared spectrum, scanning electron microscopy

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