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Development of a 3D Graphene Electrode Dielectrophoretic Device

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Graphite-polystyrene composite with enhanced electrochemical and electroanalytical performance.

Andrei M Surkov¹, Rodrigo G Queiroz¹, Rafael S Rinco¹

¹Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, São Paulo, SP, Brazil.

|December 10, 2020

Summary

A novel graphite-based composite electrode (G-PSE) offers superior performance and mechanical stability. This cost-effective electrode shows promise for electrochemical analysis in pharmaceutical formulations.

Keywords:

Cheap distinctive carbon electrodes Graphite-polystyrene composite Sensitive electroanalytical determination of pharmaceuticals

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Area of Science:

Electrochemistry
Materials Science

Background:

Development of cost-effective and stable electrodes is crucial for electrochemical sensing.
Existing electrodes like glassy carbon electrodes are expensive and can lack mechanical robustness.

Purpose of the Study:

To develop a new, mechanically stable, and cost-effective composite electrode (G-PSE).
To evaluate the electrochemical performance of the G-PSE for quantitative analysis.

Main Methods:

Fabrication of the G-PSE using graphite powder and expanded polystyrene (EPS) foam.
Optimization of graphite content to 75% (w/w).
Electrochemical characterization and application in flow injection analysis with amperometric detection.

Main Results:

The G-PSE exhibited a working potential similar to carbon paste electrodes.
Demonstrated superior mechanical stability and a faster response compared to traditional electrodes.
Successfully quantified dipyrone and paracetamol in pharmaceutical samples, validated against standard methods.

Conclusions:

The developed G-PSE is a promising alternative electrode material for electrochemical applications.
Its ease of fabrication, stability, and performance make it suitable for pharmaceutical analysis.
This composite electrode offers a cost-effective solution for amperometric detection.