Highly Sensitive Electrochemical Sensor for Sunset Yellow Based on Electrochemically Activated Glassy Carbon...

Area of Science:

• Electrochemistry
• Analytical Chemistry
• Materials Science

Background:

• Glassy carbon electrodes (GCE) are widely used in electrochemical sensing.
• Modification of GCE can enhance sensitivity and selectivity for target analytes.
• Sunset Yellow (SY) is a common food colorant requiring reliable detection methods.

Purpose of the Study:

• To fabricate and characterize an electrochemically activated glassy carbon electrode (AGCE).
• To investigate the application of AGCE for sensitive and selective detection of Sunset Yellow (SY).
• To evaluate the performance of the AGCE sensor in real beverage samples.

Main Methods:

• Fabrication of AGCE via electrochemical activation.
• Electrochemical analysis of SY using square wave voltammetry (SWV).
• Optimization of analytical conditions and validation in actual samples.

Main Results:

• AGCE demonstrated enhanced oxidation peak current for SY compared to unmodified GCE.
• Linear relationship between SY concentration (0.005-1.0 μM) and oxidation peak current.
• Achieved a low limit of detection of 0.00167 μM (S/N = 3).

Conclusions:

• The developed AGCE is a highly sensitive and selective sensor for SY detection.
• The method shows excellent recovery rates (96.19-103.47%) in beverage samples.
• AGCE is a promising material for the practical determination of SY in food and beverages.