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Title: The application of visible absorption spectroscopy to the analysis of uranium in aqueous solutions

Through assay analysis into an excess of 1 M H 2SO 4 at fixed temperature a technique has been developed for uranium concentration analysis by visible absorption spectroscopy over an assay concentration range of 1.8 – 13.4 mgU/g. Once implemented for a particular spectrophotometer and set of spectroscopic cells this technique promises to provide more rapid results than a classical method such as Davies-Gray (DG) titration analysis. While not as accurate and precise as the DG method, a comparative analysis study reveals that the spectroscopic method can analyze for uranium in well characterized uranyl(VI) solution samples to within 0.3% of the DG results. For unknown uranium solutions in which sample purity is less well defined agreement between the developed spectroscopic method and DG analysis is within 0.5%. The technique can also be used to detect the presence of impurities that impact the colorimetric analysis, as confirmed through the analysis of ruthenium contamination. Finally, extending the technique to other assay solution, 1 M HNO 3, HCl and Na 2CO 3, has also been shown to be viable. As a result, of the four aqueous media the carbonate solution yields the largest molar absorptivity value at the most intensely absorbing band, withmore » the least impact of temperature.« less
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [5]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); The Univ. of New Mexico, Albuquerque, NM (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); The Univ. of Wisconsin, Madison, WI (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Wisconsin, Madison, WI (United States)
Publication Date:
Report Number(s):
LA-UR-17-23195
Journal ID: ISSN 0039-9140
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Talanta
Additional Journal Information:
Journal Volume: 175; Journal Issue: C; Journal ID: ISSN 0039-9140
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; uranium concentration analysis; uranyl spectroscopy; visible absorption spectroscopy
OSTI Identifier:
1372801

Colletti, Lisa Michelle, Copping, Roy, Garduno, Katherine, Lujan, Elmer J. W., Mauser, Ava Kerrigan, Mechler-Hickson, Alex, May, Iain, Reilly, Sean Douglas, Rios, Daniel, Rowley, John, and Schroeder, Alex B.. The application of visible absorption spectroscopy to the analysis of uranium in aqueous solutions. United States: N. p., Web. doi:10.1016/j.talanta.2017.07.051.
Colletti, Lisa Michelle, Copping, Roy, Garduno, Katherine, Lujan, Elmer J. W., Mauser, Ava Kerrigan, Mechler-Hickson, Alex, May, Iain, Reilly, Sean Douglas, Rios, Daniel, Rowley, John, & Schroeder, Alex B.. The application of visible absorption spectroscopy to the analysis of uranium in aqueous solutions. United States. doi:10.1016/j.talanta.2017.07.051.
Colletti, Lisa Michelle, Copping, Roy, Garduno, Katherine, Lujan, Elmer J. W., Mauser, Ava Kerrigan, Mechler-Hickson, Alex, May, Iain, Reilly, Sean Douglas, Rios, Daniel, Rowley, John, and Schroeder, Alex B.. 2017. "The application of visible absorption spectroscopy to the analysis of uranium in aqueous solutions". United States. doi:10.1016/j.talanta.2017.07.051. https://www.osti.gov/servlets/purl/1372801.
@article{osti_1372801,
title = {The application of visible absorption spectroscopy to the analysis of uranium in aqueous solutions},
author = {Colletti, Lisa Michelle and Copping, Roy and Garduno, Katherine and Lujan, Elmer J. W. and Mauser, Ava Kerrigan and Mechler-Hickson, Alex and May, Iain and Reilly, Sean Douglas and Rios, Daniel and Rowley, John and Schroeder, Alex B.},
abstractNote = {Through assay analysis into an excess of 1 M H2SO4 at fixed temperature a technique has been developed for uranium concentration analysis by visible absorption spectroscopy over an assay concentration range of 1.8 – 13.4 mgU/g. Once implemented for a particular spectrophotometer and set of spectroscopic cells this technique promises to provide more rapid results than a classical method such as Davies-Gray (DG) titration analysis. While not as accurate and precise as the DG method, a comparative analysis study reveals that the spectroscopic method can analyze for uranium in well characterized uranyl(VI) solution samples to within 0.3% of the DG results. For unknown uranium solutions in which sample purity is less well defined agreement between the developed spectroscopic method and DG analysis is within 0.5%. The technique can also be used to detect the presence of impurities that impact the colorimetric analysis, as confirmed through the analysis of ruthenium contamination. Finally, extending the technique to other assay solution, 1 M HNO3, HCl and Na2CO3, has also been shown to be viable. As a result, of the four aqueous media the carbonate solution yields the largest molar absorptivity value at the most intensely absorbing band, with the least impact of temperature.},
doi = {10.1016/j.talanta.2017.07.051},
journal = {Talanta},
number = C,
volume = 175,
place = {United States},
year = {2017},
month = {7}
}