Spectrophotometric methods for osmium determination using organic reagents: application to intermetallides

Chem. Met. Alloys 2 (2009) 89-93

https://doi.org/10.30970/cma2.0098

Mariana V. Rydchuk, Galyna M. Mykhalyna, Oksana S. BONISHKO,

Olga P. DOBRYANSKA, Teodoziya Ya. Vrublevska

The present work describes the application of new spectrophotometric methods to the determination of osmium in the intermetallides Nd₂₀Os₁₅Sі₆₅ and Nd₁₀Os₃₀Sі₆₀. The methods are based on the interaction of osmium with azo dyes (Tropaeolin O, Tropaeolin OOO-I, Eriochrome Black T), flavonoids (morin and quercetin) or Tiron. They are simple and rapid. The sensitivity varies from 0.005 tо 0.8 μg ml^–1; the effective molar absorptivity is ~10³-10⁵ M^-1×сm^-1, depending on the reagent.

(1) (2) (3)

The structural formulas of Tropaeolin OOO-I (1), morin (2) and Tiron (3).

Keywords

Intermetallides / Osmium(IV) / Spectrophotometric determination / Organic reagents