摘要
利用微波辅助分别以丙酮和含酸无水甲醇为溶剂对柿叶中的单宁进行提取,采用正交试验对提取工艺进行优化。考察了微波功率、反应温度、溶剂浓度、提取时间等因素对单宁提取量的影响。结果表明,以丙酮为提取溶剂时,最佳提取工艺条件为微波功率600 W、反应温度为70℃、溶剂浓度30%、提取时间9 min,由此工艺得单宁的提取量为4.359%;以含酸无水甲醇为提取溶剂时,最佳提取工艺条件为微波功率500 W、反应温度为60℃、溶剂浓度1.4%、提取时间11 min,由此工艺得单宁的提取量为2.957%。以有机溶剂丙酮为提取剂,采用微波辅助提取,单宁提取效果更佳。
Tannin was extracted from the persimmon leaf with microwave extraction and combined with acetone and the methanol as solvent extraction, and the orthogonal test was employed to optimize the process. The effects of concentration of microwave power, microwave temperature, solvent content and extracting time were discussed. The results showed that using acetone as solvent extraction, optimum extraction condition was as follows： microwave power 600 W, microwave temperature 70 ~C, solvent content 30% and extract time 9 rnin, the extraction yield of tannin was 4.359%. Using the anhydrous methanol as solvent extraction, optimum extraction condition was as follows： microwave power 500 W, microwave temperature 60℃, solvent content 1.4% and extract time 11 min. the extraction yield of tannin was 2.957%. Using the acetone as solvent extraction, and combined with microwave irradiation, the extraction yield of tannin was more perfect.
出处
《食品工业》
北大核心
2014年第9期62-65,共4页
The Food Industry
基金
陕西省2013年省级大学生创新创业训练项目(1720)
陕西理工学院2013大学生创新实验项目(UIRP2013033)
关键词
柿叶单宁
微波提取
工艺条件
persimmon leaf tannin
microwave extraction
technological condition
