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Acetone sensing in liquid and gas phases using cyclic voltammetry.

Yusra Obeidat1, Abdel Monem Rawashdeh2, Ayman Hammoudeh2

  • 1Electronic Engineering Department, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, 21163, Jordan. yusra.obeidat@yu.edu.jo.

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This summary is machine-generated.

This study demonstrates a sensitive and reproducible cyclic voltammetry sensor for measuring acetone concentrations. The developed sensor accurately detects acetone in both liquid and vapor phases, paving the way for diabetes monitoring applications.

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry
  • Sensor Technology

Background:

  • Acetone detection is crucial for medical diagnostics, particularly for diabetes monitoring.
  • Existing methods for acetone measurement can be complex or lack sensitivity.
  • Development of rapid, reliable acetone sensors is an ongoing area of research.

Purpose of the Study:

  • To develop and characterize a novel electrochemical sensor for quantifying acetone in liquid and vapor phases.
  • To evaluate the sensor's performance metrics including linearity, sensitivity, reproducibility, and limit of detection.
  • To improve system stability for enhanced acetone sensing applications.

Main Methods:

  • Cyclic voltammetry was employed using disposable screen-printed electrodes (platinum working and counter, silver/silver chloride reference).
  • Acetone concentration was measured by analyzing changes in the cyclic voltammogram lineshape in a sulfuric acid electrolyte.
  • Experiments were conducted across a physiological concentration range (1 µM to 10 mM) for both liquid and vapor samples.

Main Results:

  • The sensor exhibited good sensitivity, reproducibility, and a linear response (R² > 0.97) for acetone detection in both liquid and gas phases.
  • A low limit of detection (LOD) of 0.1 µM was achieved.
  • Implementing a closed glass system significantly improved sensor stability and reduced calibration curve error bars by over 50%.

Conclusions:

  • The developed cyclic voltammetry sensor offers a sensitive, reproducible, and linear method for acetone quantification.
  • The improved closed system enhances sensor stability, crucial for reliable measurements.
  • This technology holds promise for future development of enzyme-based acetone sensors for non-invasive diabetes monitoring.