SPECTROPHOTOMETRIC METHODS FOR THE DETERMINATION OF OSMIUM. I. EXTRACTION AND ULTRAVIOLET SPECTROPHOTOMETRIC DETERMINATION OF OSMIUM TETROXIDE
An ultraviolet spectrophotometric method is presented for the determination of milllgram quantities of osmium in solutions of uranyl suifate. Osmium is first oxidized to the octovalent state, and the osmium tetroxide which ls formed is selectively extracted with chloroform. The ultraviolet absorption spectrum of osmium tetroxide in chloroform has a series of absorptlon bands with peak absorbancies at 282, 289, 297, 304, and 312 m mu and molar absorbancy indexes of 1870, 1760, 1640, 1400 and 1000, respectively. For each wavelength, the optimum concentration range for the determination of osmium was evaluated. From 0.4 to 3.3 mg of osmium can be determined with a coefficient of variation of 3%. Of the elements tested only chloride and octovalent ruthenium interfere; however, both of these interferences can be eliminated. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-15-023475
- OSTI ID:
- 4057409
- Journal Information:
- Talanta (England), Journal Name: Talanta (England) Vol. Vol: 7; ISSN TLNTA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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