Spectrophotometric Determination of Microgram Quantities of Osmium With Diphenylcarbazide

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A method was developed for the spectrophotometric determination of 30 to 100 mu g of osmium. The osmium as OsO/sub 4/ is extracted with CHCl/sub 3/ and diphenylcarbazide is then added to the organic extract. A blue-violet reaction product is formed, the absorbancy of which is measured at 560 m mu . A suitable reagent concentration is from 3 to 5 ml of 0.2% diphenylcarbazide in a volume of 25 ml and the preferred solvent for the reagent is ethanol. Beer's law is followed over a range of 8 to 130 mu g of osmium with a coefficient of variation ... continued below

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9 p.

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Goldstein, G. June 1, 1959.

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A method was developed for the spectrophotometric determination of 30 to 100 mu g of osmium. The osmium as OsO/sub 4/ is extracted with CHCl/sub 3/ and diphenylcarbazide is then added to the organic extract. A blue-violet reaction product is formed, the absorbancy of which is measured at 560 m mu . A suitable reagent concentration is from 3 to 5 ml of 0.2% diphenylcarbazide in a volume of 25 ml and the preferred solvent for the reagent is ethanol. Beer's law is followed over a range of 8 to 130 mu g of osmium with a coefficient of variation of about 4 After a 2-hr color-development period the molar absorbancy index is 31,300. Attempts to achieve reproducible measurements of absorbancy in less than 2 hr were unsuccessful. A study was made of the effects of foreign elements and only Ru(VIII) was found to interfere. (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-59-7-16
  • Grant Number: None
  • DOI: 10.2172/4118616 | External Link
  • Office of Scientific & Technical Information Report Number: 4118616
  • Archival Resource Key: ark:/67531/metadc871445

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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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, 3:15 p.m.

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Goldstein, G. Spectrophotometric Determination of Microgram Quantities of Osmium With Diphenylcarbazide, report, June 1, 1959; Tennessee. (digital.library.unt.edu/ark:/67531/metadc871445/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.