大学化学 >> 2021, Vol. 36 >> Issue (6): 2007044.doi: 10.3866/PKU.DXHX202007044

化学实验 上一篇    下一篇

“恒电流电解法测定铜含量”实验的改进

常静1,2,3, 商闯3, 赵温涛1,2,3,*()   

  1. 1 天津大学化学化工国家级实验教学示范中心, 天津 300072
    2 天津大学化学化工国家级虚拟仿真实验教学中心, 天津 300072
    3 天津大学理学院, 天津 300072
  • 收稿日期:2020-07-13 录用日期:2020-08-11 发布日期:2020-09-10
  • 通讯作者: 赵温涛 E-mail:changjing@tju.edu.cn
  • 作者简介:赵温涛, Email: changjing@tju.edu.cn
  • 基金资助:
    天津大学实验室建设与管理改革立项项目(LAB2018-B07)

Experimental Improvement of "Determination of Copper by Constant Current Electrolysis Method"

Jing Chang1,2,3, Chuang Shang3, Wentao Zhao1,2,3,*()   

  1. 1 National Demonstration Center for Chemistry and Chemical Engineering Education, Tianjin University, Tianjin 300072, China
    2 National Virtual Simulation Experimental Teaching Center of Chemistry and Chemical Engineering, Tianjin University, Tianjin 300072, China
    3 School of Science, Tianjin University, Tianjin 300072, China
  • Received:2020-07-13 Accepted:2020-08-11 Published:2020-09-10
  • Contact: Wentao Zhao E-mail:changjing@tju.edu.cn

摘要:

恒电流电解法是高校仪器分析课程的重要内容之一。在实验教学实践中发现,电解残留液中被忽略的微量铜导致了样品铜含量的测定结果偏低。针对此问题,对该实验进行了改进:联合原子吸收光谱法测定电解残留液中铜含量,将测定结果计入铜总量,对电解重量法的测定结果进行修正,从而提高了实验结果的准确度。改进后的实验,有利于培养学生的分析和解决问题的综合能力;同时,为仪器分析实验教学改革提供了参考。

关键词: 恒电流电解, 原子吸收光谱法, 铜, 实验改进

Abstract:

Constant current electrolysis is an important content of instrumental analysis courses in high education. When this method was used to detect copper in solution, it was found that the neglected trace copper in the electrolytic residue caused the lower recovery of the copper sample. In response to this problem, the experiment was improved: the copper residue in electrolytic was detected with atomic absorption spectrometry and included in the total amount. The result from the constant current electrolysis was revised to improve the accuracy of the experimental result. The improved experiment is conducive to cultivating students' comprehensive ability of analysis and solving problem; at the same time, it provides an example for the reform of experiment teaching in instrumental analysis.

Key words: Constant current electrolysis, Atomic absorption spectroscopy, Copper, Experiment Improvement

MSC2000: 

  • G64