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 Nd20Os15S³65 and Nd10Os30S³60.
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 tî 0.8 μg ml–1; the effective molar
absorptivity is ~103-105 M-1×ñm-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