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

A modified volumetric determination of arsenic and antimony in alloys, white metal and sulfur-antimony ore

A. Jílek and M. Nedorost

Military Technical Academy, Brno

Abstract: The Evans (C.A. 23, 5432) method was modified as follows: The As³⁺ and As⁵⁺ compds. dissolved in 6N HCl are reduced to elementary As by NaH₂PO₂.H₂O which after isolation and washing is dissolved in boiling concd. H₂SO₄. As³⁺ is titrated in a hot acid soln., according to Gy.ovrddot.ory (Vinokurova, Z. anal. Chem. 32, 415(1893)), with 0.1N KBrO₃ and methyl orange indicator. On this basis methods for the anal. of alloys of As, Sb, and Sn, of white metal (As, Sb, Sn, Cu, Ni, and Pb) and of Sb₂S₃ ore (As, Sb, Fe, Al, Cu, and S) were developed. For anal. the alloy or ore is decompd. by heating with concd. H₂SO₄. This method also can be used in the presence of SeIV and TeIV.

Full paper in Portable Document Format: 71-2a19.pdf (in Czech)

Chemical Papers 7 (1-2) 19–31 (1953)