This paper presents electrical characteristics of pure latex serum and latex serum contaminated with cassava and calcium carbonate (CaCo3). The pure serum sample was prepared by centrifuging field latex samples where the contaminated samples were prepared by adding cassava flour and CaCo3 at certain concentrations to the pure samples. Complex permittivity measurement at 1 GHz was performed with Agilent 8510E dielectric probe kit equipped with an automatic network analyzer. From the measured permittivity of pure and contaminated serum samples, we first calculated their conductivity, static permittivity, high-frequency permittivity, and relaxation time. These parameters are crucial for formulating a mathematical model for pure and contaminated latex which can be used for developing an algorithm to classify pure and contaminated latex samples.