Thermophysical properties of cryoprotectants. VII. Electrical conductivity of some cryoprotectants, their aqueous solutions and mixtures

: The paper classifies the reference data on specific electrical conductivity of water, pure cryoprotectants, their aqueous solutions and mixtures. We obtained empirical polynomial equations for calculating the specific electrical conductivity of water and pure cryoprotectants depending on temperature. Empirical polynomial equations were obtained for aqueous solutions and mixtures of cryoprotectants depending on the temperature and constant concentrations or the one and constant temperature.

The electrical conductivity of liquid dielectrics is closely associated with the structure of molecules in liquid.In non-polar liquids the conductivity is determined by the presence of dissociated inpurities, including water.In polar liquids, electrical conductivity depends not only on inpurities; sometimes it is caused by dissociation of molecules in liquid.Herewith polar liquids if compared with non-polar ones always have a higher specific conductivity.
Specific electrical conductivity of any liquid significantly depends on temperature.With temperature increasing and subsequent viscosity reduction the mobility of ions rises and a degree of thermal dissociation can increase.
The research aim was to summarize and systematize the reference data on the base of deriving https://doi.org/10.15407/cryo25.01.033The reported experimental data on specific electrical conductivity of cryoprotective agents, their aqueous solutions and mixtures were processed with MS Excel 2003 software (Microsoft, USA).Along with the data for cryoprotective agents we also processed the values of specific electrical conductivity for water and some aqueous solutions of the substances, which are essential both for cryobiology and human vital activity.
In this paper the concentrations are presented in weight percentage for the first mentioned substance.

Table 1 .
Equations to calculate specific electrical conductivity of water depending on temperature, approximation dispersions and temperature ranges of equation application

Table 4 .
Equations to calculate specific electrical conductivity of aqueous solutions of salts and mannite depending on temperature under fixed concentration, approximation dispersions and temperature ranges of equation application проблемы криобиологии и криомедицины problems of cryobiology and cryomedicine том/volume 25, №/issue 1, 2015Продолжение таблицы 4