ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

pH* values of the etalon acetate and oxalate buffer solution in the acetone water solution with mass fraction w(acetone)=50%

E. Kozáková, P. Majerský, and J. Palka

Department of Analytical Chemistry, Faculty of Natural Sciences, Komenský University, CS-842 15 Bratislava

Abstract: The EMF values of the cell without liquid junction were measured potentiometrically with palladium-plated hydrogen electrode and silver/silver chloride electrode in the standard acetate and oxalate buffer solution dissolved in the acetone—water solvent with mass fraction w(acetone) = 50 %. The obtained EMF values were used for calculating the conventional рай values of the buffer solutions which were used for calibrating the pH-meter. Further buffer solutions in the above mixed solvent were prepared for different types of Potentiometrie cells with liquid junction in the working pH* scale. The pH* values thus obtained were compared with the pH* values obtained in the concentration scale. The capacities of selected acetate and oxalate buffer solutions, their dilution factors, and correction factor for the acetone—water solvent with w(acetone) = 50 % were determined.

Full paper in Portable Document Format: 404a543.pdf

Chemical Papers 40 (4) 543–550 (1986)