Electrochemical method for detecting copper ion impurities in zinc electrolyte

By diluting the zinc electrolyte and using silver nanowire electrodes and an electrochemical workstation, the interference of high concentrations of zinc ions in the zinc electrolyte on copper ion detection was resolved, enabling simple and environmentally friendly online copper ion detection.

CN117007664BActive Publication Date: 2026-07-24FUZHOU UNIV
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Patent Information

Application Number
CN202310985125.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-07
Publication Date
2026-07-24
Estimated Expiration
2043-08-07

AI Technical Summary

Technical Problem

In the zinc hydrometallurgical process, the high concentration of zinc ions in the zinc electrolyte seriously interferes with the detection of trace copper ions, and existing technologies make it difficult to quickly and conveniently achieve accurate detection of copper ion impurities.

Method used

The zinc electrolyte was diluted by one-fold with an acetic acid-sodium acetate solution. Combined with a silver nanowire electrode and an electrochemical workstation, the copper ion concentration was determined by differential pulse anodic stripping voltammetry, enabling online analysis in a complex environment using inexpensive equipment.

Benefits of technology

It effectively eliminates the influence of high concentrations of zinc ions on copper ion detection, is easy to operate, environmentally friendly, and requires no expensive equipment, thus achieving rapid and accurate copper ion detection.

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Abstract

The application discloses an electrochemical detection method for copper ion impurities in zinc electrolyte, wherein acetic acid-sodium acetate solution is used as a background solution, then mixed with an equal volume of zinc electrolyte to obtain a to-be-detected solution, and the pH value of the to-be-detected solution is adjusted to 3.0-4.0; silver nanowires are dispersed in an ethanol solution, then coated on FTO conductive glass as a working electrode, a platinum sheet is used as a counter electrode, and an Ag / AgCl electrode is used as a reference electrode; and an electrochemical workstation is used to obtain the oxidation current of copper ions after reduction deposition in the to-be-detected solution by differential pulse anodic stripping voltammetry I Cu , in the unit of muA; the concentration of copper ions in the to-be-detected solution C Cu is obtained by the following formula: C Cu ( I Cu + 2.69) / 151.55, in the unit of mg / L. The application realizes the detection of trace copper ion impurities in high-zinc-concentration electrolyte, is convenient to operate, does not need expensive equipment, and is suitable for real-time detection in a production environment.
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