<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Physiological saline (0.9% NaCl) and deionized water were frozen in a laboratory chest freezer and impedance was monitored throughout freezing and thawing. The resistive and reactive components of electrical impedance were measured for these samples during freezing and thawing (heating) within a temperature range between 20 °C and −48 °C. The impedance of saline solution and de-ionized water increases sharply at the freezing point, similar to what is known for, e.g., complex tissues, including meat. Yet, only the saline solution impedance shows another sharp increment at a temperature between −30 and −20 °C. Changes of the electric properties after solidification suggest that the latter is linked to transformations of the ice lattice structure. We conclude that the electrical properties might serve as sensitive indicators of these phase changes.</p>
</abstract>

Physiological saline (0.9% NaCl) and deionized water were frozen in a laboratory chest freezer and impedance was monitored throughout freezing and thawing. The resistive and reactive components of electrical impedance were measured for these samples during freezing and thawing (heating) within a temperature range between 20 °C and −48 °C. The impedance of saline solution and de-ionized water increases sharply at the freezing point, similar to what is known for, e.g., complex tissues, including meat. Yet, only the saline solution impedance shows another sharp increment at a temperature between −30 and −20 °C. Changes of the electric properties after solidification suggest that the latter is linked to transformations of the ice lattice structure. We conclude that the electrical properties might serve as sensitive indicators of these phase changes.

Monitoring electric impedance during freezing and thawing of saline and de-ionized water

Faculty of Ecology and Natural Resource Management

Journal of Electrical Bioimpedance

This work is licensed under the Creative Commons Attribution 4.0 International License.

Physiological saline (0.9% NaCl) and deionized water were frozen in a laboratory chest freezer and impedance was monitored throughout freezing and thawing. The...

Monitoring electric impedance during freezing and thawing of saline and de-ionized water

Published Online: Dec 31, 2020

Page range: 106 - 111

Received: Dec 08, 2020

DOI: https://doi.org/10.2478/joeb-2020-0016

Keywords
electrical impedance, freezing, thawing, solidification, ion mobility, electron transfer

© 2020 Sisay Mebre Abie et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

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Monitoring electric impedance during freezing and thawing of saline and de-ionized water

Published Online: Dec 31, 2020

Page range: 106 - 111

Received: Dec 08, 2020

DOI: https://doi.org/10.2478/joeb-2020-0016

Keywordselectrical impedance, freezing, thawing, solidification, ion mobility, electron transfer

© 2020 Sisay Mebre Abie et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Keywords
electrical impedance, freezing, thawing, solidification, ion mobility, electron transfer