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Updated: Jul 27, 2025
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Accumulation and Analysis of Cuprous Ions in a Copper Sulfate Plating Solution
Published on: March 20, 2019
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Selective determination of cuprous ion in copper dissolving solution based on bathocuproine-modified expanded
Xiaohui Chen1, Yufa Sun2, Wenchang Wang2
1School of Chemistry and Material Engineering, Changzhou Institute of Technology, Changzhou, 213032, People's Republic of China.
Summary
A new electrochemical sensor using bathocuproine (BCP) modified expanded graphite (EG) offers selective detection of cuprous ions. This sensor is crucial for improving quality control in electrolytic copper foil manufacturing.
Area of Science:
- Electrochemistry
- Materials Science
- Analytical Chemistry
Background:
- Cuprous ions significantly impact copper-plated surface microstructure.
- Quantitative analysis of cuprous ions in copper foil production is limited.
- Accurate monitoring of cuprous ions is essential for quality control.
Purpose of the Study:
- To develop a novel electrochemical sensor for selective cuprous ion determination.
- To enhance analytical sensitivity and selectivity in complex matrices.
- To provide a tool for quality improvement in electrolytic copper foil manufacturing.
Main Methods:
- Modification of expanded graphite (EG) electrode with bathocuproine (BCP).
- Electrochemical determination of cuprous ions using the BCP-EG electrode.
- Evaluation of sensor performance in the presence of high concentrations of copper ions and other interferences.
Main Results:
- The BCP-EG electrode demonstrated high sensitivity and selectivity for cuprous ions.
- A wide detection range of 1.0 μg/L–5.0 mg/L was achieved for cuprous ions.
- A low detection limit of 0.18 μg/L (S/N=3) was obtained, even with 50 g/L copper ions present.
Conclusions:
- The developed BCP-EG electrode is a promising analytical tool for cuprous ion detection.
- The sensor's selectivity and sensitivity are suitable for industrial applications.
- This method can contribute to enhanced quality control in electrolytic copper foil production.
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