微波法提取杨桃渣中多酚的工艺研究

Study on the Extraction Technologies of Polyphenols from Carambola Dregs by Microwave Method

[目的]研究微波法提取杨桃渣中多酚的工艺条件。[方法]利用微波提取法,通过单因素研究了5个因素对杨桃多酚提取率的影响,并通过正交试验筛选提取杨桃渣多酚的最佳工艺条件。[结果]单因素试验表明,物料粒径30目,微波功率560 W、60%乙醇浓度、料液比1∶50、提取时间60 s、提取2次可得到从杨桃渣中提取多酚的最佳效果。正交试验表明,4因素对微波提取杨桃渣多酚的影响顺序为溶剂浓度>料液比>提取时间>功率;微波法从杨桃渣中提取多酚的最佳工艺条件为:乙醇浓度50%、物料颗粒30目、液料比1∶70、微波功率700 W、提取时间60 s,在此条件下从杨桃渣中提取的多酚浓度可达18.725 mg/g。[结论]微波辅助萃取具有提取率更高、所需时间短的特点,应用前景广阔。

[Objective] The aim was to research the technique conditions on polyphenol extraction from carambola dregs with microwave method. [Method] The effect of 5 factors on polyphenol extraction rate from carambola was studied through single factor by using microwave method, and the best technique conditions for extracting polyphenol from caran^ola dregs were screened through orthogonal test. [Result] The single factor experiment showed that the op- timum effect of extracting the polyphenol from carambela dregs could be obtained when the size of raw material was 30 meshes, microwave power 560 W, ethanol conch. 60%, solid-liquid ratio 1：50, extracting time 60 s and the extracting was twice. The orthogonal test indicated the influence of 4 factors on polyphenol extraction from caraamsola dregs with microwave was in the order as： solvent concn. 〉 solid-liquid ratio 〉 extracting time 〉 power. The best technique conditions for extracting polyphenol from carambola dregs with microwave method were as： the ethanol conch, was 50%, size of raw material 30 meshes, solid-liquid ratio 1：70, microwave power 700 W and extracting time 60 s, under these conditions, the conch, of polyphenol that was extracted from carambola dregs could be up to 18.725 mg/g. [ Conclusion] The raicrowave-assisted extraction had characteristics of higher extraction rate and need of less time, with extensive application prospect.