Complex dielectric permittivity of rum and its mixtures with methanol, ethanol, and water at frequencies up to 15 GHz

Abstract

An analysis of the complex dielectric permittivity of rum ʻHavana Club Añejo 3 Añosʼ and its mixtures with methanol, ethanol, and deionized water is presented in this work. Measurements are carried out using the open-ended coaxial probe technique within a frequency range from 500 MHz to 15 GHz. Curves of the real and imaginary parts as well as the permittivity spectra (Cole–Cole diagram) and relaxation parameters of the liquids-under-test are presented. Distribution of the relaxation parameters for the different inclusion levels is analyzed and modelled. Comparison between the measured data and permittivity mixture theory is carried out; comments on the accuracy of each are discussed. A validation of the measurement process is realized by means of an evaluation of the experimental and literature dielectric permittivity values.