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Miniaturized 3D-Printed Cell Enables Water/Ethanol Quantification Using Electrochemical Impedance Spectroscopy
Pablo A Paixao1, Flávio S Michels1, Samuel L Oliveira2
1Applied Nanomaterials and Devices, Institute of Physics, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil.
Sensors (Basel, Switzerland)
|January 11, 2024
Summary
A new, low-cost, 3D-printed electrochemical system accurately measures ethanol fuel content. This portable device offers rapid, on-site analysis, enhancing fuel quality control.
Area of Science:
- Electrochemistry
- Materials Science
- Analytical Chemistry
Background:
- Accurate ethanol quantification is crucial for fuel quality control and regulatory compliance.
- Existing methods for ethanol analysis can be time-consuming, expensive, or require laboratory settings.
- Miniaturized and portable analytical devices are increasingly needed for on-site and remote applications.
Purpose of the Study:
- To develop a miniaturized, low-cost, and easily assembled electrochemical system for rapid and accurate ethanol content quantification in ethanol fuel.
- To leverage 3D printing technology for the fabrication of a monolithic electrochemical impedance spectroscopy (EIS) cell.
- To validate the performance of the developed system against established methods for ethanol fuel analysis.
Main Methods:
- Fabrication of a miniaturized electrochemical cell using 3D printing with thermoplastic electrode separators.
- Utilizing electrochemical impedance spectroscopy (EIS) to quantify ethanol content based on dielectric properties.
- Comparison of measurements from the developed system with a digital densimeter using samples from four gas stations.
Main Results:
- The developed 3D-printed electrochemical system achieved rapid and accurate quantification of ethanol content in fuel.
- The device demonstrated excellent agreement with a digital densimeter, validating its precision.
- The system is portable (26 × 24 mm), has a small sample capacity (1 mL), and can be printed and assembled within two hours.
Conclusions:
- A cost-effective, miniaturized, and portable 3D-printed electrochemical system for ethanol fuel analysis has been successfully developed.
- The system's ease of assembly, rapid analysis, and accuracy make it suitable for lab-on-a-chip applications and on-site fuel quality control.
- This technology offers a versatile and affordable solution for precise ethanol quantification, particularly in remote locations.
