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Accurate Determination of the Equilibrium Surface Tension Values with Area Perturbation Tests
Published on: August 30, 2019
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Unsupervised bubble calorimetry analysis: Surface tension from isothermal titration calorimetry
Pablo F Garrido1, Margarida Bastos2, Adrián Velázquez-Campoy3
1Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
Journal of Colloid and Interface Science
|September 10, 2021
Summary
A new algorithm analyzes bubble signals in isothermal titration calorimetry to accurately determine liquid surface tension. This method effectively extracts periodic data from noisy thermal power readings for precise surface tension measurements.
Area of Science:
- Physical Chemistry
- Materials Science
Background:
- Isothermal titration calorimetry (ITC) generates signals from bubble dynamics.
- Analyzing these signals can yield valuable information about liquid properties.
Purpose of the Study:
- To develop and validate a new algorithm for analyzing ITC signals.
- To accurately determine the surface tension of liquids using ITC.
Main Methods:
- Air is injected into the ITC sample cell containing liquids or solutions.
- A novel algorithm analyzes the resulting calorimetric signal to identify bubble-related periodic contributions.
Main Results:
- The algorithm successfully isolates bubble signals from noisy data.
- Automated determination of bubble periods allows for accurate surface tension calculation.
- Calibration requires only two reference measurements, independent of injection rate.
Conclusions:
- The developed algorithm provides a robust method for surface tension determination using ITC.
- This technique offers accurate and automated analysis of complex calorimetric data.
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