响应面法优化八月瓜果皮总多酚的超声提取工艺
2017-07-13符智荣李雪峰周登维
符智荣 李雪峰 周登维
摘要 [目的]优化八月瓜果皮超声水解提取总多酚的工艺条件。[方法]以八月瓜果皮为研究对象,通过单因素试验和响应面试验考察了水解pH、水解温度和水解时间对总多酚得率的影响,建立了数学模型。[结果]用乙醇作为溶剂,按1∶20(g/mL)固液比加60%乙醇水溶液,在最优条件下(pH 5.23,水解温度53.76 ℃,水解时间115.66 min),模型对总多酚得率的预测值为5.63%。优化条件组合(pH 5.23,水解温度54 ℃,水解时间116 min)试验下总多酚得率为5.58%,模型预测值与组合试验结果吻合。[结论]试验结果为八月瓜的开发提供了理论依据。
关键词 八月瓜;总多酚;水解;响应面法
中图分类号 TS201.2 文献标识码 A 文章编号 0517-6611(2017)34-0001-03
Abstract [Objective] The aim was to optimize extraction technology of total polyphenol by ultrasonichydrolysis. [Method] With Akebia trifoliate pericarp as the research object, Influence of pH, hydrolysis temperature and time on extraction yield of total polyphenol was investigated by single factor experiment and response surface method. Mathematical model of the experiment was established. [Result] The results show that using ethanol as solvent, according to 1∶20(g/mL) solidliquid ratio addition 60% ethanol aqueous solution, model on predictive value of total polyphenols extraction yield was 5.63% at pH of 5.23, 53.76 ℃ hydrolysis 115.66 min. Extraction ratio of total polyphenols under combination experiment of optimal condition was 5.58%. The model predicted values and the combination experiment result was identical. [Conclusion] The results provide reference for the exploitation of Akebia trifoliate.
Key words Akebia trifoliate;Total polyphenol;Hydrolysis;Response surface method
八月瓜(Akebia trifoliate),又名八月炸、牛滾瓜,主要分布在我国西南各省、区、市。八月瓜是木通科植物三叶木通的果实,可入药和食用,是一种药食两用绿色水果[1]。研究表明,八月瓜含有丰富的有机酸、可溶性糖、维生素、氨基酸、多酚和微量元素,具有良好的医疗保健作用[2-3]。随着野生八月瓜的引种种植,八月瓜的研究也不断精细化。欧阳玉祝等[4-5]对八月瓜籽油提取和营养成分进行了分析,并对油中脂肪酸组成与含量进行了研究;符智荣等[6]用GC-MS分析了八月瓜果皮挥发油的化学成分;吴莹等[7]用GC-MS分析了八月瓜果实香气的化学成分;谢小霞等[8]综述了三叶木通的药学现状;林卉等[9]对八月瓜果皮齐墩果酸的超临界CO2萃取工艺条件进行了优化。八月瓜果皮中含有丰富的多酚,多酚化合物通过苷键或酯键与其他生物大分子结合,这些键的断裂直接影响多酚的得率。……
