摘要
以多酚收率为优化指标,对花椒中多酚的提取工艺进行研究,通过单因素试验考察处理温度、提取时间、溶剂体积分数、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提取溶剂为乙醇溶液、溶剂体积分数48.23%、料液比1∶29.34(g/m L)、处理温度48.99℃、提取时间1.75 h、提取液pH 3,在此条件下进行5次平行实验,预测的多酚收率为55.06 mg/g。此外,研究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厂放大和深入研究提供一定依据。
The extraction of polyphenols from Chinese prickly ash was optimized for increased yield of polyphenols.The influence of temperature,extraction time,solvent concentration,solid-to-solvent ratio and pH on extraction efficiency was investigated initially by one-factor-at-a-time method.Using the Box-Behnken response surface methodology,the optimum extraction conditions were obtained as follows： 48.23%（V/V） acidified ethanol（pH 3） as extraction solvent,solid-to-solvent ratio 1：29.34（g/m L）,temperature 48.99 ℃,and extraction time 1.75 h.Under these optimized conditions,the average yield of polyphenols reached 55.06 mg/g（n = 5）.In addition,the mass transfer kinetics during the extraction of polyphenols at different temperatures was investigated.Based on Fick＇s first law of diffusion,a kinetic equation was established with the plate model.The key model parameters,including rate constant,relative extraction rate and activation energy,were obtained.These results could provide a theoretical basis for industrial extraction and further study of polyphenols from Chinese prickly ash.
作者
郭宏垚
李冬
雷雄
王小静
刚勇
李稳宏
GUO Hongyao;LI Dong;LEI Xiong;WANG Xiaojing;GANG Yong;LI Wenhong(College of Chemical Engineering, Northwest University, Xi’an 710069, China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2018年第2期247-253,共7页
Food Science
基金
陕西省青年科技新星项目(2016KJXX-32)
陕西省教育厅服务地方专项计划项目(14JF026)
关键词
花椒
多酚
提取工艺
响应面分析法
动力学
Chinese prickly ash
polyphenols
extraction
response surface analysis
kinetics
