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茶叶科学 ›› 2015, Vol. 35 ›› Issue (5): 473-480.doi: 10.13305/j.cnki.jts.2015.05.011

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多孔淀粉对茶多酚的吸附性能及其复合物抗氧化能力的研究

骆慧敏1, 宁敏2, 徐迎波2, 王程辉2, 杜先锋1,*   

  1. 1. 安徽农业大学 教育部茶叶生物化学与生物技术重点实验室,安徽 合肥 230036;
    2. 烟草化学安徽省重点实验室(安徽中烟工业有限责任公司),安徽 合肥 230088
  • 收稿日期:2015-01-26 修回日期:2015-04-08 出版日期:2015-10-15 发布日期:2019-08-26
  • 通讯作者: *dxf@ahau.edu.cn
  • 作者简介:骆慧敏,女,硕士,主要从事天然产物化学研究。
  • 基金资助:
    烟草化学安徽省重点实验室开放课题(0920140109013)、国家自然科学基金项目(31471700)

Adsorption Properties of Porous Starch on Tea Polyphenols and Antioxidative Capacity of the Complex

LUO Huimin1, NING Min2, XU Yingbo2, WANG Chenghui2, DU Xianfeng1,*   

  1. 1. Key Lab of Tea Biochemistry and Biotechnology, Ministry of Education, Anhui Agricultural University, Hefei 230036, China;
    2. Anhui Key Laboratory of Tobacco Chemistry(China Tobacco Anhui Industrial CO., LTD), Hefei 230088, China;
  • Received:2015-01-26 Revised:2015-04-08 Online:2015-10-15 Published:2019-08-26

摘要: 采用双酶法制备玉米多孔淀粉,以玉米多孔淀粉作为载体吸附茶多酚,研究玉米多孔淀粉吸附茶多酚的影响因素,正交实验优化吸附条件。探讨了吸附热力学规律,用Freundlich和Langmuir方程拟合并绘制等温吸附线,研究表明吸附过程比较符合Langmuir吸附规律(R2>0.99)。根据Langmuir等温吸附线计算微分吸附热,吸附热符合氢键键能范围,通过测定该复合物对DPPH与ABTS自由基的清除率,可见复合物仍保持较高的抗氧化能力,多孔淀粉复合后的茶多酚自氧化速度显著减慢。

关键词: 多孔淀粉, 茶多酚, 吸附, 抗氧化

Abstract: Porous cornstarch was prepared by synergism of the α-amylase and gluamaylase and employed as a carrier to absorb tea polyphenol(TP), the factors affecting the adsorption were optimized by using the orthogonal experimental design. Studying on the adsorption thermodynamic characteristic and fitting the isotherms with Langmuir equation and Freundlich equation, it turned out that the adsorption isotherm was well represented by the Langmuir equation (R2>0.99). The different heat of adsorption according to the Langmuir adsorption isotherm conformed to the hydrogen bonding key range. Furthermore, the investigation on the antioxidative activity of the complex by measuring the scavenging capabilities on DPPH and ABTS free radicals showed that the complex possessed a good antioxidant activity rised with the concentration of TP, and the auto-oxidation rates of TP turned to a significant slower rate after TP was adsorbed on the porous starch.

Key words: porous starch, tea polyphenols, adsorption, antioxidant

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