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Simple, Fast and Sensitive Voltammetric Procedure for Copper Ion Determination Using a Solid Gold Microelectrode

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Summary

A reusable gold microelectrode array enables sensitive detection of copper(II) ions using anodic stripping voltammetry (ASV). This eco-friendly method offers accurate quantification in environmental samples.

Keywords:

anodic stripping voltammetry copper determination gold microelectrode array

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Area of Science:

Electrochemistry
Analytical Chemistry
Environmental Science

Background:

Accurate determination of copper(II) ions is crucial for environmental monitoring.
Existing methods may lack sensitivity, reusability, or eco-friendliness.
Development of novel electrode materials and techniques is needed.

Purpose of the Study:

To develop and validate a gold microelectrode array for copper(II) determination.
To optimize anodic stripping voltammetry (ASV) parameters for enhanced sensitivity and accuracy.
To assess the reusability and environmental compatibility of the proposed method.

Main Methods:

Fabrication and characterization of a gold microelectrode array.
Optimization of experimental parameters for ASV, including pH, electrolyte concentration, and deposition conditions.
Application of square wave voltammetry for copper(II) detection.
Validation using certified reference materials and environmental water samples.

Main Results:

The gold microelectrode array demonstrated excellent performance for copper(II) detection via ASV.
Linear calibration curves were obtained over wide concentration ranges (e.g., 5 × 10^-10 to 5 × 10^-8 mol L^-1 with 90s deposition).
A low limit of detection (1.93 × 10^-10 mol L^-1) and good reproducibility (RSD 4.7%) were achieved.
The method showed high accuracy when analyzing certified reference materials and tap water samples.

Conclusions:

The developed gold microelectrode array is a sensitive, reusable, and eco-friendly tool for copper(II) determination.
The optimized ASV procedure provides accurate and reliable results for environmental water analysis.
This method holds significant potential for practical applications in water quality monitoring.