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Drop Drying on the Sensor: One More Way for Comparative Analysis of Liquid Media.

Tatiana Yakhno1, Alexander Pakhomov1, Anatoly Sanin1

  • 1Institute of Applied Physics RAS, 46 Ulyanov Street, 603950 Nizhny Novgorod, Russia.

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|September 18, 2020
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Summary

This study introduces a new sensor device that analyzes liquid drop drying patterns to identify liquids. The method uses electrical impedance changes to distinguish between different beverages and milk concentrations.

Keywords:
comparative analysisdrying dropsrecognition statisticssensor devicesignal processing

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Area of Science:

  • Physical Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Liquid drop drying on solid substrates exhibits self-organization phenomena reproducible under consistent external conditions.
  • These drying patterns are solely determined by the liquid's composition and dispersion, offering a unique fingerprint.
  • Recording these processes on a sensor device allows for liquid characterization.

Purpose of the Study:

  • To validate the principle of using liquid drop drying patterns for identification.
  • To develop a user-friendly sensor device for liquid analysis.
  • To establish a method for distinguishing between different liquids based on their drying characteristics.

Main Methods:

  • Utilizing the self-organization patterns of drying liquid drops on a sensor surface.
  • Measuring the real and imaginary parts of the electrical impedance of a resonator.
  • Analyzing the relative positions of sample hodographs on a complex plane to assess similarity/difference.

Main Results:

  • Demonstrated the reproducibility of drying patterns under controlled conditions.
  • Developed a functional sensor device for liquid analysis.
  • Successfully distinguished between various brands of alcoholic beverages and different concentrations of reconstituted milk.

Conclusions:

  • The drying patterns of liquid drops can serve as a reliable passport characteristic for liquid identification.
  • The developed sensor device, based on electrical impedance measurements, is effective for differentiating liquids.
  • The hodograph comparison method provides a robust criterion for liquid similarity and difference assessment.