食品科学 ›› 0, Vol. ›› Issue (): 0-0.

• 工艺技术 •    下一篇

花椒多酚提取工艺响应面优化及动力学

郭宏垚,李冬,雷雄,王小静,刚勇,李稳宏   

  1. 西北大学
  • 收稿日期:2017-03-31 修回日期:2017-11-08 出版日期:2018-01-25 发布日期:2018-01-05
  • 通讯作者: 李冬 E-mail:lidong@nwu.edu.cn
  • 基金资助:
    陕西省青年科技新星;陕西省教育厅服务地方专项计划项目

The Response Surface Optimization and Kinetics Research on Extraction Process of Chinese Prickly Ash Polyphenols

Li 0Dong2, 2, 2, 2, 2   

  • Received:2017-03-31 Revised:2017-11-08 Online:2018-01-25 Published:2018-01-05
  • Contact: Li 0Dong E-mail:lidong@nwu.edu.cn

摘要: 本文开展了对花椒中多酚的提取工艺研究,以多酚收率为优化指标,通过单因素实验考察了处理温度、提取时间、溶剂浓度、料液比和提取液pH值对多酚提取过程的影响。利用Box-Behnken响应面分析法优化多酚提取的最佳工艺条件为溶剂浓度为48.42%,料液比为29.27 mL/g,处理温度为49.40 ℃,提取时间为1.78 h,提取液pH为3,在此条件下进行5次平行实验,预测的多酚收率为55.03 mg/g。此外,研究了不同温度下总酚的传质动力学,通过平板模型以Fick第一定律为基础建立了花椒多酚提取的动力学模型,并求解出速率常数、相对萃余率及活化能等关键模型参数,为花椒多酚提取的工程放大和深入研究提供一定依据。

关键词: 花椒, 多酚, 提取工艺, 响应面分析法, 动力学

Abstract: The extraction process research of polyphenols in Chinese prickly ash was studied in this paper. With the yield of polyphenols as evaluation index, the influence of temperature, extraction time, solvent concentration, solid-liquid ratio and the pH value of extraction on the extraction process of Chinese prickly ash polyphenols were investigated by single-factor tests. The optimum extraction process conditions were obtained through the Box-Behnken response surface: solvent concentration of 48.42%, liquid-solid ratio of 29.27 mL/g, temperature of 49.40℃, extracting time of 1.78h and solvent pH value of 3. On this optimum extraction process conditions, the polyphenols yield reached 55.03 mg/g by five parallel tests. In addition, the mass transfer kinetics of polyphenols at different temperature was investigated. Based on the Fick’s first law of diffusion, the kinetic equation for extraction of polyphenols in Chinese prickly ash was established by plate model, The key model parameters, such as rate constant, relative extraction rate and activation energy, were obtained. The results could provide the theory basis for the engineering amplification and the further study of polyphenols extraction in Chinese prickly ash.

Key words: Chinese prickly ash, polyphenols, extraction, response surface analysis, kinetics

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