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

Indirect polarographic determination of aldehydes in the presence of ketones

M. Fedoroňko, J. Koenigstein, and M. Bullová

Institute of Chemistry, Slovak Academy of Sciences ,Bratislava

Abstract: A method for indirect polarographic detn. of H₂CO and AcH in the presence of Me₂CO and MeCOEt is described. This method is based on the great reactivity of aldehydes with o-phenylenediamine and iso-BuNH₂ and can be used for quant. analyses. Benzimidazolines are formed by the reaction of the aliphatic aldehyde with o-phenylenediamine in a phosphate buffer at pH 6.0 and 20°. They can be identified by the anodic waves. The imines are formed by the reaction of aliphatic or aromatic aldehydes with iso-BuNH₂ in iso-BuNH₂ buffer at pH 10.4 and 20°. They can be identified by the cathodic waves. Both these reactions are not affected by the presence of the ketones. The error of the aldehyde detn. in the concn. range 2 × 10^-4-10 × 10^-4 and in the presence of ketones is ±2%.

Full paper in Portable Document Format: 221a25.pdf (in Slovak)

Chemical Papers 22 (1) 25–33 (1968)