| 茶叶中提取咖啡碱实验的改进 |
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| 引用本文： | 杨宇辉,王晓岗,张荣华.茶叶中提取咖啡碱实验的改进[J].实验室科学,2012,15(6):56-58. |
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| 作者姓名： | 杨宇辉 王晓岗 张荣华 |
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| 作者单位： | 同济大学化学系,上海,200092 |
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| 基金项目： | 同济大学第四期精品实验项目 |
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| 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。
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| 关 键 词： | 提取咖啡碱 实验改进 教学效果 |
Improvement of the experiment to extract caffeine from the tea |
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| YANG Yu-hui
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WANG Xiao-gang
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ZHANG Rong-hua.Improvement of the experiment to extract caffeine from the tea[J].Laboratory Science,2012,15(6):56-58. |
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| Authors: | YANG Yu-hui WANG Xiao-gang ZHANG Rong-hua |
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| Institution: | (Department of Chemistry,Tongji University,Shanghai 200092,China) |
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| Abstract: | 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. |
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| Keywords: | extracting caffeine experiment improvement teaching effect |
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