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Citation: Xuejiao Liu, Jiantao Zai, Shaoyu Zheng, Xiaomin Xie. 咖啡因实验的创新升级：多维度探究与教学价值挖掘[J]. University Chemistry, ;2026, 41(10): 287-295. doi: 10.12461/PKU.DXHX202510009 shu

咖啡因实验的创新升级：多维度探究与教学价值挖掘

School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

Corresponding author: Xiaomin Xie, xiaominxie@sjtu.edu.cn
Received Date: 9 October 2025
Accepted Date: 17 December 2025

针对经典“茶叶中提取咖啡因”实验存在的原料单一、方法固化、探究深度不足及与生活关联性弱等问题，通过多原料选择、多方法比较及多维度分析进行系统性教学优化。实验选取三种不同发酵程度茶叶与两种不同产地的咖啡粉为原料，采用控制变量法设计索氏提取与水煮两种提取方法，并建立气相与液相色谱两种定量分析体系，以实现精准定量。实验保留经典索氏提取核心操作，将纯化环节设为可选拓展模块(升华法与薄层层析法)，课时充足时可灵活补充。结果表明，所测样品中，茶叶中咖啡因绝对含量高于咖啡粉，但结合日常饮用习惯，单份咖啡的咖啡因摄入量反而更高，从而辩证解释了实验数据与日常认知间的差异。改革后的实验从单一操作训练升级为综合探究载体，有效激发了学生兴趣，实现了实验技能、科学思维与创新素养的协同培养。
- Caffeine,
- Experiment teaching reform,
- Multi-dimensional inquiry,
- Teaching value,
- Scientific thinking
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