Experimental Devices for Extraction of Caffeine from Teas
PAN Yu-Zhen1, CAI Jing-Wen1, ZENG Min1, FAN Wen-Jie2, TAN Da-Zhi1
1. Experiment Center of Chemistry, Dalian University of Technology, Dalian 116023, China; 2. School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China
Abstract This article introduced an experimental method for extracting caffeine from teas by automatic extraction apparatus and rotary evaporator, provided an improved sublimation device instead of the traditional method based on funnel evaporating dish, discussed the relationships and differences between modern chemical experimental means and conventional laboratory methods. The new method was useful to understand the characteristics of modern chemistry instruments such as convenient, fast and accurate. The combination of traditional and modern methods could enrich the connotation and technical means of organic chemistry experiment, enhance students' interest of learning chemistry, and therefore achieved good teaching effects.
