大学化学 >> 2021, Vol. 36 >> Issue (2): 1912020.doi: 10.3866/PKU.DXHX201912020

化学实验 上一篇    下一篇

电位法测定茶水中氟含量的实验改进探索

方卫民1,*(), 委育秀1, 蔡吉清1, 祝海娟1, 余月儿2, 陈童2   

  1. 1 浙江大学化学系, 杭州 310058
    2 浙江大学茶学系, 杭州 310058
  • 收稿日期:2019-12-02 录用日期:2019-12-04 发布日期:2019-12-10
  • 通讯作者: 方卫民 E-mail:fangwm@zju.edu.cn
  • 作者简介:方卫民,Email: fangwm@zju.edu.cn

Improving the Potentiometric Determination of Fluoride Content in Tea Solution

Weimin Fang1,*(), Yuxiu Wei1, Jiqing Cai1, Haijuan Zhu1, Yeer Yu2, Tong Chen2   

  1. 1 Department of Chemistry, Zhejiang University, Hangzhou 310058, China
    2 Department of Tea Science, Zhejiang University, Hangzhou 310058, China
  • Received:2019-12-02 Accepted:2019-12-04 Published:2019-12-10
  • Contact: Weimin Fang E-mail:fangwm@zju.edu.cn

摘要:

通过对被测溶液中加入与不加总离子强度缓冲调节剂,及对不同茶叶的泡制水温、泡制时间等影响条件进行定量测定研究,对原有实验方案得以进一步优化改进。其目的是使学生能较深入理解控制测定条件的重要性,以便进一步激发学生对化学实验科学性、趣味性和可操作性的兴趣。

关键词: 离子选择性电极, 氟含量, 实验改进

Abstract:

The original experimental scheme was further optimized and improved by quantitatively measuring the effects of total ionic strength adjusting buffer, different tea leaves and tea-making water temperature and time. The objective is to enable students to understand the importance of controlling the experimental conditions for determination, so as to further stimulate students' interest in the science and pleasure of chemistry experiments.

Key words: Ion selective electrode, Fluoride content, Experimental improvement

MSC2000: 

  • G64