Direct Potentiometry of Low Levels of Water in Organic Solvents using Cells without a Liquid-junction under the Proton Isoconcentration Technique

Abstract

Direct potentiometry of the system, non-polar organic solvent (acetonitrile)-(0-0.118 % m/m) water-10-3M hydrochloric acid using a micro pH glass electrode and Radiometer chloride selectrode (cell without liquid junction), has been employed and tested experimentally. The system shows systematic change in potential with variations in water concentration. This technique allows simple, rapid and accurate determination of low levels of water in acetonitrile under Proton Isoconcentration Technique (PICT).