微波预处理对超临界CO2脱除绿茶中咖啡因和EGCG影响的研究

doi:10.13305/j.cnki.jts.2005.03.008

Abstract

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

CLC Number:

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.

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

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

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