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Detection of Freezing Point by Dielectric Measurements

Bureau of Chemistry and Soils

ABSTRACT

Preliminary work on a dielectric method of detecting the appearance or disappearance of ice crystals has been presented. The method seems to offer the possibility of making freezing-point depression measurements in colloidal materials under equilibrium conditions, hence making thermodynamic interpretation possible. The method offers possibility of use wherever ice separates as a pure phase during freezing.

Some data have been obtained on water, sugar solutions, soil, and plant tissue, which indicate that the method can be used for determining freezing-point depressions in these materials.

¹ Now of the University of Wisconsin.