Direct Electrochemical Detection of Tyramine in Beer Samples Using a MWCNTs Modified GCE

Area of Science:

• Electrochemistry
• Analytical Chemistry
• Food Science

Background:

• Tyramine is a biogenic amine found in fermented foods like beer, and its levels are important for quality control.
• Traditional methods for tyramine detection, such as HPLC, can be time-consuming and require extensive sample preparation.

Purpose of the Study:

• To develop a novel electrochemical sensor for the direct and sensitive determination of tyramine in beer samples.
• To optimize the sensor's performance and validate its applicability in real-world food analysis.

Main Methods:

• Fabrication of a glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWCNTs).
• Electrochemical detection of tyramine at a low potential (0.53 V).
• Optimization of electrochemical parameters and sensor performance evaluation.

Main Results:

• The developed MWCNTs-GCE sensor exhibited a linear response for tyramine in the range of 3 to 9 µM.
• Achieved a low limit of detection (LOD) of 0.34 µM and a limit of quantification (LOQ) of 1 µM.
• Successfully applied the sensor to analyze tyramine in commercial beer samples, with results comparable to HPLC.

Conclusions:

• The developed electrochemical sensor offers a rapid, sensitive, and cost-effective method for tyramine determination in beer.
• This approach eliminates the need for complex sample preparation, making it suitable for routine food analysis.
• The sensor demonstrates significant potential for monitoring tyramine levels in various aqueous food matrices.