| 超临界CO_2提取茶叶中咖啡碱 |
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| 引用本文： | 汪小钢 萧伟祥. 超临界CO_2提取茶叶中咖啡碱[J]. 茶叶科学, 1998, 18(1): 65-69 |
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| 作者姓名： | 汪小钢 萧伟祥 |
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| 作者单位： | 安徽农业大学茶叶系!合肥，230036，安徽农业大学茶叶系!合肥，230036 |
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| 摘 要： | 用超临界萃取技术分离提取茶叶中的咖啡碱，再用CH2Cl2萃取分离，得到纯度为95．16％的咖啡碱，萃取率和得率分别为16．85％、0．55％。试验结果还表明，在一定条件下，利用超临界萃取技术能够有效地分离茶多酚和咖啡碱。
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| 关 键 词： | 茶叶 咖啡碱 超临界萃取 |
Preparation of Caffeine from Tea by Supercritical Carbon Dioxide |
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| Wang Xiaogang, Xiao Weixiang. Preparation of Caffeine from Tea by Supercritical Carbon Dioxide[J]. Journal of Tea Science, 1998, 18(1): 65-69 |
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| Authors: | Wang Xiaogang Xiao Weixiang |
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| Abstract: | Caffeine was separated and extracted from tea by supercritical CO2, and then purified with CH2Cl2. The caffeine product with purity of 95. 16% was obtained. The extraction rate and yield rate were 16.85% and 0. 55% respectively. The results also showed that tea polyphenols and caffeine could be effectively separated by supercritical extraction Under certain conditions, |
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| Keywords: | Tea Caffeine Supercritical extraction |
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