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Citation: Tongyu Zheng, Teng Li, Xiaoyu Han, Yupei Chai, Kexin Zhao, Quan Liu, Xiaohui Ji. A DIY pH Detection Agent Using Persimmon Extract for Acid-Base Discoloration Popularization Experiment[J]. University Chemistry, ;2024, 39(5): 27-36. doi: 10.3866/PKU.DXHX202309107 shu

A DIY pH Detection Agent Using Persimmon Extract for Acid-Base Discoloration Popularization Experiment

College of Chemical Environment Science, Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province, China

Received Date: 28 September 2023
Revised Date: 26 December 2023

This experiment employs the coordination reaction between epigallocatechin gallate (EGCG) from persimmon extract and ferrous sulfate. The study investigates the responsive changes of the complex solution at different pH, aiming to achieve a portable differentiation application for common acidic and alkaline substances in daily life. The experiment utilizes readily available raw materials, ensures a safe process, and demonstrates observable phenomena, allowing the audience to appreciate the beauty of chemical transformations and fostering a strong interest in the field of chemistry.
- Persimmon,
- Tannins,
- Iron coordination compound,
- Portable pH measurement
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