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Citation: Longping Li, Jiali Li, Tiange Qu, Jiaqing Cai, Chuyu Zhang, Wenji Guo, Qiulian Li, Fan Luo. “可视化”助力从茶叶中提取咖啡因实验的关键步——升华[J]. University Chemistry, ;2025, 40(8): 272-276. doi: 10.12461/PKU.DXHX202409137 shu

“可视化”助力从茶叶中提取咖啡因实验的关键步——升华

Longping Li ¹ ,
Jiali Li ² ,
Tiange Qu ¹ ,
Jiaqing Cai ³ ,
Chuyu Zhang ¹ ,
Wenji Guo ⁴ ,
Qiulian Li ⁴ ,
Fan Luo ^4,,

1.
School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China;
2.
School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China;
3.
School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China;
4.
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Corresponding author: Fan Luo, luofan16@hust.edu.cn
Received Date: 29 September 2024
Revised Date: 23 December 2024

升华是“从茶叶中提取咖啡因”实验的关键步，这一步由于在蒸发皿里完成，学生在整个加热过程中不能直观地观察升华完成的全过程，并且由于加热温度不易控制导致部分学生的样品由于温度过低根本就没有开始升华，或者由于温度过高有色杂质跟着一起升华出来，甚至直接碳化，使得产品不纯和损失。本文在升华时用玻璃器皿代替蒸发皿，学生可以清楚地观察升华过程中的现象，并且利用温敏试纸监测找到升华的最佳温度。“可视化”的融入，不仅有助于学生观察、记录实验现象，将实验现象和升华的温度关联起来，更重要的是培养学生理论和实践相结合的能力和解决问题的能力。
- Caffeine,
- Sublimation,
- Temperature sensitive test paper,
- Visualization
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