【摘要】 “茶叶中咖啡因的提取”实验通常是作为一个专业性实验开设,实验耗时长、使用提取剂毒性大、不易操作。为激发学生学习兴趣、改革教学内容、提高学生实验素养,本着安全、经济、高效、环保的原则,在原实验的溶解条件、提取剂选择、滤液浓缩和升华过程中加热强度的控制等方面进行了认真探索和改进,把该实验成功地引入基础化学实验教学,取得了理想的效果。更多还原

【Abstract】 The experiment of extraction of caffeine from tea is very professional which is time-consuming and the extracter used is poisonous. To stimulate students’ interest in learning, reform teaching content and enhance students’ ability, the paper studies the conditions of solution, the selection of extracters and heat strength control during the condensing of filtrate and sublimation following to improve them in terms of the principle of safety, economy, high-resolution and enviroment-conserving. The improved experiment has been applied to experimental teaching of fundamental chemistry and obtained perferable effect.更多还原