Direct Spectrophotometric Determination of Uranium in Cyclohexane Solutions of Tri-n-Octylphosphine Oxide

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A method for the direct determination of uranium in a cyclohexane solution of tri-n-octylphosphine oxide (TOPO) is presented. The adduct, UO/sub 2/ Cl/sub 2/ x 2TOPO, that is formed when uranium(VI) is extracted from hydrochloric acid solutions by tri-n-octylphosphine oxide absorbs light in the ultraviolet region. This absorbance is measured at 230 m mu vs. a TOPO-cyclohexane solution that was contacted with hydrochloric acid of the same concentration as that in the test aliquot. The molar absorbance index is 5500. The method is not selective; of the elements that are extracted by TOPO from hydrochloric acid, iron(III), zirconium, molybdenum, tin … continued below

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9 p.

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White, J. C. April 21, 1959.

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A method for the direct determination of uranium in a cyclohexane solution of tri-n-octylphosphine oxide (TOPO) is presented. The adduct, UO/sub 2/ Cl/sub 2/ x 2TOPO, that is formed when uranium(VI) is extracted from hydrochloric acid solutions by tri-n-octylphosphine oxide absorbs light in the ultraviolet region. This absorbance is measured at 230 m mu vs. a TOPO-cyclohexane solution that was contacted with hydrochloric acid of the same concentration as that in the test aliquot. The molar absorbance index is 5500. The method is not selective; of the elements that are extracted by TOPO from hydrochloric acid, iron(III), zirconium, molybdenum, tin and thorium, only thorium can be tolerated. (auth)

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9 p.

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

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  • April 21, 1959

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  • Sept. 16, 2016, 12:32 a.m.

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  • May 13, 2019, 5:57 p.m.

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White, J. C. Direct Spectrophotometric Determination of Uranium in Cyclohexane Solutions of Tri-n-Octylphosphine Oxide, report, April 21, 1959; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc869733/: accessed October 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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