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

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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 ... continued below

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9 p.

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Goldstein, G. June 1, 1959.

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Description

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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9 p.

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  • Other Information: Orig. Receipt Date: 31-DEC-61

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  • Report No.: CF-59-6-43
  • Grant Number: None
  • DOI: 10.2172/4118617 | External Link
  • Office of Scientific & Technical Information Report Number: 4118617
  • Archival Resource Key: ark:/67531/metadc865902

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • June 1, 1959

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:16 p.m.

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Goldstein, G. ULTRAVIOLET SPECTROPHOTOMETRIC DETERMINATION OF OSMIUM TETROXIDE IN CHCl{sub 3}, report, June 1, 1959; Tennessee. (digital.library.unt.edu/ark:/67531/metadc865902/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.