| 茶叶浸提液微波辅助萃取过程中溶剂选择的差异 |
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| 引用本文： | 刘自琴,黄惠华.茶叶浸提液微波辅助萃取过程中溶剂选择的差异[J].食品工业科技,2011(3):100-102,105. |
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| 作者姓名： | 刘自琴 黄惠华 |
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| 作者单位： | 华南理工大学轻工与食品学院,广东,广州,510640 |
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| 基金项目： | 国家“863”计划项目(2007AA100404); 广东省科技计划项目(2010B020312005) |
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| 摘 要： | 研究了绿茶中活性成分儿茶素单体在不同性质的溶剂(甲醇、乙醇、水、乙酸乙酯)下,微波辅助萃取的效率和选择性差异。实验结果发现,酯型儿茶素单体(L-EGCG和L-ECG)用甲醇或乙醇萃取较用水萃取效率高,其他三种简单儿茶素单体(L-EGC,D,L-C,L-EC)则是以纯水作为萃取溶剂萃取效率为佳。乙酸乙酯对儿茶素各单体的浸出量相对水、甲醇和乙醇都大幅减少。适当增加萃取溶剂的离子浓度,会有利于微波辅助萃取效率的提高,但溶剂的离子浓度过大时,会降低儿茶素各单体的浸出量。
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| 关 键 词： | 儿茶素 微波辅助萃取 溶剂 离子浓度 |
Differences between different solvents in microwave-assisted extraction of green tea extract |
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| LIU Zi-qin,HUANG Hui-hua.Differences between different solvents in microwave-assisted extraction of green tea extract[J].Science and Technology of Food Industry,2011(3):100-102,105. |
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| Authors: | LIU Zi-qin HUANG Hui-hua |
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| Affiliation: | LIU Zi qin,HUANG Hui hua* (Department of Food Science and Technology,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Research was carried out on the differences between different solvents in microwave assisted extraction of green tea extract. The results showed that the extraction yields of the main two catechin monomers,epigallocatectin gallate(L EGCG) and epicatectin gallate(L ECG) were higher in the cases of methanol and ethanol as solvent than purified water. Compared with purified water,methanol and ethanol,ethyl acetate showed the lowest extraction yields of catechins as solvent. Appropriate addition of NaCl in wate... |
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| Keywords: | catechin microwave assisted extraction solvent ionic concentration |
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