摘要
针对＂茶叶中提取咖啡碱实验＂中存在的问题进行改进,采用沙浴对咖啡碱的分离和提纯过程进行控温,焙炒的温度控制在120～140℃,升华温度220～235℃,获得白色针状的咖啡碱,改进后产物的纯度提高,取得了良好的教学效果。
In the paper,the problems in the extraction of caffeine from the tea are solved.The high puritycrystalline caffeine has been obtained by the sand bath to control the roasting and sublimating temperature： the roasting temperature is 120~140℃,and the sublimating temperature is 220~235℃.An excellent experimental teaching effect has been obtained.
出处
《实验室科学》
2012年第6期56-58,共3页
Laboratory Science
基金
同济大学第四期精品实验项目（项目编号：1380104061）
关键词
提取咖啡碱
实验改进
教学效果
extracting caffeine
experiment improvement
teaching effect
