Abstract
A study of alterations of water structure in solutions containing substances of biological origin as a function of their concentration can be made in establishing curves of the dielectric dispersion of these solutions. For this purpose, a waveguide has been set up, working between 7 and 10 GHz and between 10 and 60 °C, which allows the dielectric parameters of aqueous solutions to be determined through the measurements of a reflection coefficient and an absorption coefficient.The aim of this paper is to describe the set-up and to report the method of measurement.Results obtained for water agree very closely with those of Hasted and Grant; those obtained for DMSO are new. The dielectric dispersion of these two liquids is represented by a Debye-type law with a spread in the relaxation time. Variations of this spread with temperature are observed.
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