ULTRAVIOLET SPECTROPHOTOMETRIC DETERMINATION OF OSMIUM TETROXIDE IN CHCl{sub 3} | Zendy

Gérald Goldstein | Zendy

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ULTRAVIOLET SPECTROPHOTOMETRIC DETERMINATION OF OSMIUM TETROXIDE IN CHCl{sub 3}

Author(s) -

Gérald Goldstein

Publication year - 1959

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/4118617

Subject(s) - osmium , osmium tetroxide , chemistry , ultraviolet , ruthenium , absorption spectroscopy , absorption (acoustics) , analytical chemistry (journal) , inorganic chemistry , materials science , chromatography , optics , organic chemistry , electron microscope , physics , optoelectronics , composite material , catalysis

A method was developed for the determination of osmium by measuring the absorbancy of osmium tetroxide in CHCl/sub 3/. The osmium is first oxidized to the octavalent state and the osmium tetroxide which is formed is extracted selectively with CHCl/sub 3/. The ultraviolet absorption spectrum of OsO/sub 4/ in CHCl/sub 3/ has a series of absorption bands with peak absorbancies at 282, 289. 297, 304, and 312 m mu , and molar absorbancy indices of 1870. 1760, 1640, 1400, and 1000, respectively. For each wavelength the optimum concentration range for the determination of osmium was evaluated by the method of Ringbom. Only chloride and octavalent ruthenium interfere in the determination. By this method, from 0.4 to 3 mg of osmium can be determined with a coefficient of variation of 3%. (auth

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