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

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.