Poly-salicylic acid modified glassy-carbon electrode and its application

Area of Science:

• Electrochemistry
• Analytical Chemistry
• Materials Science

Background:

• Sensitive detection of trace metal ions like copper is crucial for environmental monitoring.
• Existing methods for copper determination often require pre-concentration steps or exhibit limited sensitivity.
• Glassy-carbon electrodes are widely used in electroanalysis but can be further modified to improve performance.

Purpose of the Study:

• To develop a highly sensitive electrochemical sensor for copper(II) detection.
• To investigate the performance of a poly-salicylic acid modified glassy-carbon electrode (PSAMGCE) for copper analysis.
• To apply the developed sensor for the determination of trace copper(II) in water samples.

Main Methods:

• Electropolymerization of salicylic acid to create a modified glassy-carbon electrode (PSAMGCE).
• Anodic stripping voltammetry (ASV) to study copper behavior on the PSAMGCE.
• Validation of the PSAMGCE for trace copper(II) determination in real water samples.

Main Results:

• The PSAMGCE demonstrated a significant increase in sensitivity (approximately 40-fold) compared to the unmodified glassy-carbon electrode.
• Anodic stripping voltammetry effectively characterized copper's electrochemical behavior on the modified electrode.
• The sensor achieved high accuracy with 96-106% recovery and good precision with a relative standard deviation of approximately 3% for trace copper(II) determination in water.

Conclusions:

• The poly-salicylic acid modified glassy-carbon electrode (PSAMGCE) is a highly sensitive and effective platform for copper detection.
• Electropolymerization of salicylic acid offers a viable strategy for enhancing electrode performance in electroanalytical applications.
• The developed PSAMGCE shows great promise for the reliable and accurate determination of trace copper(II) in environmental water analysis.