On the measurement of the junction potential between two aqueous single electrolyte solutions

• Experimental method of measurements of junction potentials is proposed. • The experimental set-up is presented. • Its applicability and limitations is discussed. • Its coherence with the previous research is demonstrated. A method to measure the junction potential between two aqueous electrolyte solutions is proposed. The experimental set up requires a solid-state ion selective electrode and two identical single junction reference electrodes, each containing one of the solutions whose junction potential is to be measured. The two reference electrodes and the ion selective electrode are immersed in an aqueous electrolyte solution, containing the ion to which the ISE responds. In principle, if there is no interference in the voltage response of the ISE from other ions present in the sample solution, the application of the method is independent of the type of ion-selective electrode used.