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. V. Carbon electrodes in anhydrous dimethylformamide medium

J. Berčík, Z. Hladký, and M. Čakrt

Institut für analytischerehemie der Slowakischen Technischen Hochschule, Bratislava 1

Abstract: The applicability of the activated carbon electrodes impregnated with epoxide resin functioning as indication electrodes in Potentiometrie titrations of acid substances in, the medium of anhydrous dimethylformamide was investigated. The graphite electrode was activated by the oxidation with 0.2 M-KMn0₄ in 0.5 M-H₂S0₄ and following reduction with 0.05 M-SnCl₂ in 1 м-HCl. Phenylcinchoninic, benzoic, o-aminobenzoic, p-aminobenzoic, diethylbarbituric, p-aminosalicylic, amidosulfonic, and palmitic acids as well as phenylhydrazonium chloride, p-nitrophenol, hydrogen chloride, peutachlorothiophenol and 2-thio-6-azathymirie were titrated with 0.1 м sodium methoxidc or 0.1 м tetrabutylammonium hydroxide. The standard deviation and systematic error for the amount of 1 nival was 1.8 μval and +1.9 μval, respectively.

Full paper in Portable Document Format: 244a298.pdf (in German)

Chemical Papers 24 (4) 298–302 (1970)