能把下面一段话翻译成英文摘要么摘要：目的,研究从茶叶中提取咖啡因的方法,并掌握用恒压滴液漏斗提取有机物的原理和方法.方法

Abstract: Objective To study the method, extraction of caffeine from tea, and master the principles and methods of organic matter from a constant pressure drop funnel. Methods: using ethyl alcohol as solvent, using extraction device, distillation device, sublimation of extraction of caffeine from tea dust device in 8g. Results with 95% ethanol extraction refluxing tea powder to reflux liquid becomes clear, and then reflux distillation 1H, finally to the evaporating dish liquid adding lime and temperature control of 3G at 190 DEG C sublimation drying of products of 10min, a small amount of white crystal. PS: don't Baidu translation