University Chemistry ›› 2021, Vol. 36 ›› Issue (6): 2007044.doi: 10.3866/PKU.DXHX202007044

• Chemistry Laboratory • Previous Articles     Next Articles

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


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