The effect of NaCl concentration on the ionic NaCl solutions electrical impedance value using electrochemical impedance spectroscopy methods

NaCl solution is a strong electrolyte that can produce Na+ and Cl− ions. Measurements of impedance values of dielectric materials have been widely applied, but for materials containing many ions such as electrolyte solutions still carried out today. This paper analyzes the relationship between concentrations and the electrical impedance value of NaCl solutions. Electrochemical impedance spectroscopy (EIS) method is applied by injecting an electrochemical stimulus in the form of an electric current of one milli-ampere into NaCl solutions. Response output voltage was recorded using PicoScope S-5000. The impedance measurement uses two needle electrodes made of gold in the frequency range 1 Hz to 1 MHz. The sample of NaCl solutions used in NaCl and water ratio is 0.01-3.00%. The electrical impedance of the NaCl solutions decreases with the increase in concentration of NaCl solutions.