大学化学 >> 2026, Vol. 41 >> Issue (4): 372-379.doi: 10.12461/PKU.DXHX202502015

化学实验 上一篇    下一篇

电导沉淀滴定法测定酱油中氯离子含量——推荐一个本科化学实验

郭思宇, 陈之晔, 刘剑钊, 王艺璇, 封心建, 李淑瑾   

  1. 苏州大学材料与化学化工学部, 江苏 苏州 215123
  • 收稿日期:2025-02-08 录用日期:2025-04-25 发布日期:2026-04-24
  • 通讯作者: 封心建, 李淑瑾 E-mail:fengxj@suda.edu.cn;shujinli@suda.edu.cn Xinjian Feng, Shujin Li
  • 基金资助:
    苏州大学课程2022-3I工程—混合式教学课程项目;苏州大学第二批本科教学团队项目(5831501820);化学国家一流本科专业建设点专项经费。

Determination of Chloride Ion Content in Soy Sauce by Conductometric Precipitation Titration: A Recommended Undergraduate Chemistry Experiment

Siyu Guo, Zhiye Chen, Jianzhao Liu, Yixuan Wang, Xinjian Feng, Shujin Li   

  1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu Province, China
  • Received:2025-02-08 Accepted:2025-04-25 Published:2026-04-24
  • Contact: Xinjian Feng, Shujin Li E-mail:fengxj@suda.edu.cn;shujinli@suda.edu.cn

摘要: 把电导沉淀滴定法测定酱油中氯离子含量实验引入到本科物理化学实验教学中,有助于学生全面理解电导滴定的原理和应用。引导学生关注食品安全问题,培养社会责任感和树立为社会服务的意识。实验内容贴近生活,能够激发学生的实验兴趣。实验所需仪器与试剂均为实验室常用,在3–4小时内可完成实验,符合大学本科基础实验要求。

关键词: 电导滴定法, 沉淀滴定法, 电导率, 物理化学实验

Abstract: Introducing the conductometric precipitation titration method for determining chloride ion content in soy sauce into undergraduate physical chemistry laboratory courses enables students to gain a comprehensive understanding of both the theoretical principles and practical applications of conductometric titration. This experiment not only raises students' awareness of food safety issues but also cultivates their social responsibility and commitment to public service. With its relevance to daily life, the experiment effectively stimulates students' interest in laboratory work. Utilizing standard laboratory equipment and reagents, the procedure can be completed within 3–4 hours, meeting the requirements for fundamental experiments in undergraduate curricula.

Key words: Conductivity titration, Precipitation titration, Conductivity, Physical chemistry experiment