Development and application of a CNT-Ag-Cu-Al/PS-based paper electrode for detecting diverse analytes in complex...

Area of Science:

• Electrochemistry
• Materials Science
• Analytical Chemistry

Background:

• Electrochemical sensors are vital for detecting analytes in complex matrices.
• Current electrodes often lack the sensitivity and selectivity for multi-component detection.
• Development of versatile electrodes is crucial for advancing analytical capabilities.

Purpose of the Study:

• To develop a novel paper-based electrode for simultaneous detection of multiple analytes.
• To investigate the electrochemical performance of an amphiprotic amino-bonded carbon nanotube-Ag/Cu/Al nanoparticle/polystyrene-coated paper electrode.
• To assess the electrode's utility in detecting glucose, oxytetracycline, and hydroquinone.

Main Methods:

• Fabrication of a composite paper electrode incorporating carbon nanotubes and Ag/Cu/Al nanoparticles.
• Electrochemical characterization and performance evaluation for glucose, oxytetracycline, and hydroquinone detection.
• Testing the electrode's selectivity, anti-interference, stability, and reproducibility.

Main Results:

• The developed CNT-Ag-Cu-Al/PS electrode demonstrated high sensitivity and selectivity for glucose, oxytetracycline, and hydroquinone.
• Excellent linear responses were observed within specific concentration ranges for each analyte.
• Achieved low limits of detection: 0.2055 μM for glucose, 0.0074 μM for oxytetracycline, and 0.0048 μM for hydroquinone.

Conclusions:

• The CNT-Ag-Cu-Al/PS paper electrode is a promising platform for multi-analyte detection in complex matrices.
• The electrode exhibits superior selectivity, anti-interference, stability, and reproducibility.
• Successful application in detecting analytes in human body fluids, food, and environmental waters validates its practical potential.