A Simple Optical Method for Determination of the Dielectric Constant of Salt (%) Water using Ultraviolet Light

Abstract

Optical constants such as refractive index, absorption coefficient, extinction coefficient and the real (εr) and imaginary (εi) components of the dielectric constant for NaCl salt water (10-50%) were determined from the UV Optical transmission data. Results of UV transmission analysis in salt water have shown that in dilute solutions the dielectric constant (real & img) is linear. The addition of dissolved Na and Cl ions above (50%) to water results in a drop in dielectric constant.