Study on the Influences of Microwave Pre-treatment on the Extraction Rate of Caffeine and EGCG from Green Tea with Supercritical-CO2 Technology

YU Hua-zhong; ZHOU Dong-wu; LI Guo-zhang; CAO Yong; LIU Sheng-kai; LONG Wei-zhen

doi:10.13305/j.cnki.jts.2005.03.008

2005 , Vol. 25 >Issue 3: 203 - 207

DOI: https://doi.org/10.13305/j.cnki.jts.2005.03.008

Study on the Influences of Microwave Pre-treatment on the Extraction Rate of Caffeine and EGCG from Green Tea with Supercritical-CO₂ Technology

YU Hua-zhong ,
ZHOU Dong-wu ,
LI Guo-zhang ,
CAO Yong ,
LIU Sheng-kai ,
LONG Wei-zhen

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1. Key Laboratory of Hunan Forest Product &Chemical Industry Engineering, Zhangjiajie 427002 China;
2. Scientific research institute of the forestry, Zhangjiajie 427000 China

Online published: 2019-09-16

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Abstract

The influences of microwave pretreatment on the extraction rate of caffeine and EGCG from green tea with supercritical CO₂(SC-CO₂) extraction technology were analyzed. And through orthogonal experiments, the best parameter of decaffeination from tea with SC-CO₂ extraction technology was ascertained. The result showed that the decaffeination rate from the tea under microwave pretreatment could improve obviously, but the influences on EGCG was small, by using the orthogonal design test , the order of the influences factors on decaffeination rate of the caffeine is extracting pressure>Extracting temperature> entrainer>water content of the tea.

Key words： Supercritical CO₂ extraction; Microwave pretreatment; Green tea; Caffeine; EGCG

Cite this article

YU Hua-zhong , ZHOU Dong-wu , LI Guo-zhang , CAO Yong , LIU Sheng-kai , LONG Wei-zhen . Study on the Influences of Microwave Pre-treatment on the Extraction Rate of Caffeine and EGCG from Green Tea with Supercritical-CO₂ Technology[J]. Journal of Tea Science, 2005 , 25(3) : 203 -207 . DOI: 10.13305/j.cnki.jts.2005.03.008

References

[1] 国家药典委员会. 中华人民共和国药典[M] 2000年版(二部). 北京: 化学工业出版社, 2000.
[2] 严鸿德. 茶叶深加工技术[M]. 北京: 中国轻工业出版社, 2001.
[3] 钟萝. 茶叶品质理化分析[M]. 上海: 上海科技出版社, 1989.
[4] 唐根源. 等度反相高效液相色谱法测定茶多酚中的儿茶素和咖啡因[J]. 色谱, 2001, 19(3): 233~235.
[5] 周海滨. 超临界CO2脱除茶叶咖啡碱的工艺优化研究[J]. 食品科学, 2003, 18(5): 88~91.

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