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

Use of carbon indicating electrodes in potentiometric neutralization titrations. IV. Carbon electrodes in acetic anhydride and anhydrous acetonitrile media

J. Berčík, M. Čakrt, and Z. Hladký

Institut für analytische Chemie der Slowakischen Technischen Hochschule, Bratislava 1

Abstract: Tetramethylammonium iodide, tetraethylammonium iodide, trimethyl - phenylammonium iodide, trimethyllaurylammonium chloride (septonex), pyridine, dimethylformamide, dimethyl sulfoxide, and hydroxyethyltheophylline were titrated potentiometrically in the medium of acetic anhydride by using the carbon electrode activated by the oxidation with 0.2 M-KMn0₄ in 0.5 M-H₂S0₄ and subsequent reduction with 0.05 M-SnCl₂ in 1 м-HCl. Diphenylguanidine, morpholine, N-ethylpiperidine, aniline, N,N-dimethylaniline, N,N-diethylapiline, pyridine, α-picoline, and 8-hydroxyquinoline were titrated potentiometrically in the medium of anhydrous acetonitrile. In this case the indication carbon electrode was activated by the oxidation with an acidified solution of potassium permanganate. I t was the 0.05 N solution of HCl0₄ which was used as titrating agent in both cases. The standard deviation did not exceed 0.3 μval for an individual determination of 0.1 mval of base.

Full paper in Portable Document Format: 244a290.pdf (in German)

Chemical Papers 24 (4) 290–297 (1970)