Relative Dielectric Relaxation Study of Sorbitol and Carbohydrate in Water Mixture using Time Domain Reflectometry

The complex permittivity spectra of D-sorbitol and carbohydrates with water mixtures were measured over frequency range 10 MHz to 30 GHz. A temperature dependent complex permittivity spectrum shows the Debye behaviour whereas the relaxation in mixtures can be described by Cole?Davidson function. The dielectric parameters i.e. static Dielectric constant and relaxation time were obtained from the complex permittivity spectra using nonlinear least square fit method. The Kirkwood correlation factor and thermodynamic parameters (Enthalpy and Entropy) have also been determined.