微波辅助提取荸荠皮中多酚类物质的工艺研究

Extracting Polyphenol from Water Chestnut Peel with Microwave-Assisted Extraction

[目的]探讨提取条件对荸荠皮中多酚类物质提取率的影响,确定最佳提取工艺。[方法]以荸荠皮为原料,采用微波提取其中的多酚类物质,通过单因素试验和正交试验,探索微波功率、乙醇浓度、微波提取时间、料液比4个因素对多酚类物质提取的影响,确定多酚类物质提取最佳工艺。[结果]微波提取荸荠皮中多酚类物质的最佳工艺条件:微波提取功率400 W,乙醇浓度70%,微波提取时间6min,料液比1∶40 g/ml,在此条件下,荸荠皮中多酚类物质的提取率为3.15%。[结论]该研究为荸荠皮的进一步开发利用提供了理论依据。

[ Objective ] The study aimed to discuss the effect of extraction condition on the extraction rate of polyphenol in the water chestnut peel so as to determine the optimum extraction process condition. [ Method ] With the water chestnut peel as the test material, through the sin- gle-factor test and orthogonal test, the effect of 4 factors including microwave power, ethanol concentration, microwave extraction time and sol- id-liquid radio on the extraction of polyphenol were researched by using microwave extraction and the optimum extraction process of polyphenol was confirmed. [ Result] The optimum extraction process condition of polyphenol in water chestnut peel by using microwave was as follows： microwave power of 400 W, ethanol concentration of 70%, microwave extraction time of 6 rain, solid-liquid ratio of 1：40 g/ml. Under these conditions, the extraction ratio of water chestnut peel polyphenol was 3.15%. [ Conclusion] The research pro;ided certain theoretical basis for the development and utilization of water chestnut peel.