GOU Gao-Zhang1, SHENG Jin-Suo1, ZHANG Bin1, YANG Yuan-Qian1, WU Yun-Ying2, LIU Wei1
1. School of Science, Honghe University, Mengzi 661199, China;
2. College of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi 653100, China
Abstract Soxhlet extractor is commonly used as extraction device in chemical experiments, extraction of caffeine from beverage plants is an important experiment in basic organic chemistry. However, Soxhlet extractor has some shortcomings such as low extraction temperature, long extraction time, low extraction efficiency, fragile siphon tube, easily contaminated or blocked extraction tube and siphons. In order to improve the extraction temperature, extraction efficiency and shorten the extraction time, the external cylinder is added outside the extraction tube, which can effectively protect the siphon and has the function of heating and heat preservation for the extraction tube. The lower end of the condenser tube is provided with a bell mouth and barbs, which is convenient for binding or hanging sample bags to prevent the extraction tube and siphon from being contaminated or blocked. And the effect of improved Soxhlet extractor was evaluated. Compared with the original device, the improved device not only overcomes the above disadvantages, but also retains the features and functions of the original device. It has high extraction efficiency and is very convenient to use. It is worth to be promoted and used in universities.
GOU Gao-Zhang, SHENG Jin-Suo, ZHANG Bin, YANG Yuan-Qian, WU Yun-Ying, LIU Wei. Improvement and Application of Soxhlet Extractor[J]. Chinese Journal of Chemical Education, 2019, 40(22): 46-49.
