从茶叶中提取咖啡因实验方法的改进

Experimental improvement of extracting caffeine from tea

“从茶叶中提取咖啡因”是有机化学实验中一个经典的天然产物提取实验,实际教学中发现,利用传统的实验方法,存在着操作复杂,反应时间长,提取物产率低等问题,为了解决这些问题,通过添加碳酸钠试剂、改用旋转蒸发仪和微量升华器的方法对实验进行改进,该方法不仅简化了实验操作,缩短了提取时间,增加了提取产率,而且引入新仪器的实验教学,极大地增加了学生的实验兴趣,同时培养了学生科学研究的学习兴趣和实验操作技能。

“Extracting caffeine from tea”is a classic natural product extraction experiment in organic chemistry experiments.It is found in practical teaching that using traditional experimental methods,there are problems such as complicated operation,long reaction time,low extraction yield,etc.To solve these problems,the experiment was improved by adding sodium carbonate,using a rotary evaporator,and a sublimator,thereby simplifying the experimental operation,shortening the extraction time,and increasing the extraction yield.Moreover,the introduction of experimental teaching of new instruments has greatly increased the students interest in experiments,and at the same time cultivated students interest in learning and experimental skills in scientific research.