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

Oscillopolarographic study of the reduction of selenites and tellurites

V. P. Gladyshev and Z. B. Rozhdestvenskaya

Kazakh State Univ., Alma-Ata.

Abstract: In oscillographic polarography with a.c. and a dropping Hg electrode, SeO₃^-- in HCl or H₂SO₄ solns. gives 3 cathodic inflections at potentials of -0.51, -0.75, and - 1.14 v.; TeO₃^-- gives analogous inflections at -0.41, -0.78, and -1.2 v. vs. satd. calomel electrode. The 2nd cathodic inflection appears at concn. of SeO₃^-- or TeO₃^-- of 5 × 10^-5M and corresponds to redn. to H₂Se or H₂Te, resp., while the 1st is capacitive in nature and the 3rd corresponds to catalytic H evolution. In M KOH, SeO₃^-- is inactive, while TeO3-- gives a sharp anodic inflection at - 1.24 v. The best supporting electrolyte for detn. of SeO₃^-- is 0.5M Na₂CO₃ + 0.05M complexone III.

Full paper in Portable Document Format: 178a586.pdf (in Slovak)

Chemical Papers 17 (8) 586–591 (1963)