闪式提取法提取枣果皮中多酚的工艺研究

Study on extraction of polyphenolics from Zizyphus jujube peel by flash extraction

利用闪式提取法提取枣果皮中的多酚。考察了乙醇体积分数、料液比、提取时间和提取次数对枣果皮中多酚得率的影响。根据考察结果,运用正交实验方法对影响多酚得率的条件进行优化,然后进行验证实验。结果表明,最佳提取工艺条件为:乙醇体积分数为60%,料液比1∶35(g/mL),提取时间为2min,提取3次;在此条件下,多酚得率达到13.62mg/g。该工艺与超声波提取相比,简单、迅速、得率高,可用于枣果皮中多酚的提取。

The flash extraction method was employed to extract polyphenolics from Zizyphus jujube peel. The effect of single factor of ethanol volume fraction, ratio of raw material to liquid ,extraction time,extraction times on the extract rate of polyphenolics were investigated. The orthogonal experiment was conducted on the base of the single factor experiment,and then the verification test and comparative experiments were also conducted. The result showed that the optimum extraction conditions were as follows ：volume fraction of ethanol of 60%, ratio of raw material to liquid of 1：35（g/mL）, extracting three times, and each for 2min. Under such conditions,the yield of poiyphenolics was 13.62mg/g. Compared with the ultrasonic extraction,the proposed method was simple and fast with high extraction efficiency,which could be used to extract polyphenolics from Zizyphus jujube peel.