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Title: Improving the separation of strontium and barium with Sr Resin using chelating eluent solutions

Abstract

Age dating radioactive 137Cs and 90Sr sources, which are a potential concern in radiation dispersal devices, can provide evidence for attribution in a nuclear forensic investigation. Precise measurement of the 137Cs– 137Ba or 90Sr– 90Zr isotope ratio by ICP-MS in tandem with non-linearity and mass-bias data manipulation dramatically increases precision and decreases uncertainty, leaving inadequate chemical separation efficiencies as a major contributor—and in some cases the lead contributor—to uncertainty in age determination. To improve the separation of these isobars before ICP-MS analysis, we evaluated eluents containing EDTA and DTPA chelating agents against previously studied eluents for their ability to achieve complete removal of Sr and Ba from Eichrom Technologies’ Sr Resin. Barium separation efficiencies using 0.05 M EDTA, pH-adjusted 0.05 M EDTA, and pH-adjusted 0.05 M DTPA were found to be 100.9 ± 2.2%, 99.4 ± 0.8%, and 99.3 ± 1.2%, respectively. Strontium separation efficiencies using 0.05 M disodium EDTA and 0.05 M potassium EDTA were determined to be 100.14 ± 0.53% and 100.19 ± 0.97% respectively. Furthermore, these results demonstrate that eluents containing chelating agents out-perform previously studied eluent solutions at removing barium and strontium from Sr Resin.

Authors:
 [1];  [2];  [3];  [2];  [4];  [2];  [2];  [2];  [4]
  1. Univ. of Cincinnati, Cincinnati, OH (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Univ. of Cincinnati, Cincinnati, OH (United States)
  3. Univ. of South Carolina Aiken, Aiken, SC (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1497007
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 319; Journal Issue: 3; Journal ID: ISSN 0236-5731
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 07 ISOTOPE AND RADIATION SOURCES; 137Ba; 137Cs; 90Sr; EDTA; age dating; extraction chromatography; nuclear forensics; radiation dispersal devices

Citation Formats

Surrao, Alicia, Smith, Skyler W., Foerster, Emma, Spitz, Henry B., Graczyk, Donald G., Landero-Figueroa, Julio A., McLain, Derek R., Connick, William B., and Steeb, Jennifer L. Improving the separation of strontium and barium with Sr Resin using chelating eluent solutions. United States: N. p., 2019. Web. doi:10.1007/s10967-019-06432-w.
Surrao, Alicia, Smith, Skyler W., Foerster, Emma, Spitz, Henry B., Graczyk, Donald G., Landero-Figueroa, Julio A., McLain, Derek R., Connick, William B., & Steeb, Jennifer L. Improving the separation of strontium and barium with Sr Resin using chelating eluent solutions. United States. doi:10.1007/s10967-019-06432-w.
Surrao, Alicia, Smith, Skyler W., Foerster, Emma, Spitz, Henry B., Graczyk, Donald G., Landero-Figueroa, Julio A., McLain, Derek R., Connick, William B., and Steeb, Jennifer L. Thu . "Improving the separation of strontium and barium with Sr Resin using chelating eluent solutions". United States. doi:10.1007/s10967-019-06432-w.
@article{osti_1497007,
title = {Improving the separation of strontium and barium with Sr Resin using chelating eluent solutions},
author = {Surrao, Alicia and Smith, Skyler W. and Foerster, Emma and Spitz, Henry B. and Graczyk, Donald G. and Landero-Figueroa, Julio A. and McLain, Derek R. and Connick, William B. and Steeb, Jennifer L.},
abstractNote = {Age dating radioactive 137Cs and 90Sr sources, which are a potential concern in radiation dispersal devices, can provide evidence for attribution in a nuclear forensic investigation. Precise measurement of the 137Cs–137Ba or 90Sr–90Zr isotope ratio by ICP-MS in tandem with non-linearity and mass-bias data manipulation dramatically increases precision and decreases uncertainty, leaving inadequate chemical separation efficiencies as a major contributor—and in some cases the lead contributor—to uncertainty in age determination. To improve the separation of these isobars before ICP-MS analysis, we evaluated eluents containing EDTA and DTPA chelating agents against previously studied eluents for their ability to achieve complete removal of Sr and Ba from Eichrom Technologies’ Sr Resin. Barium separation efficiencies using 0.05 M EDTA, pH-adjusted 0.05 M EDTA, and pH-adjusted 0.05 M DTPA were found to be 100.9 ± 2.2%, 99.4 ± 0.8%, and 99.3 ± 1.2%, respectively. Strontium separation efficiencies using 0.05 M disodium EDTA and 0.05 M potassium EDTA were determined to be 100.14 ± 0.53% and 100.19 ± 0.97% respectively. Furthermore, these results demonstrate that eluents containing chelating agents out-perform previously studied eluent solutions at removing barium and strontium from Sr Resin.},
doi = {10.1007/s10967-019-06432-w},
journal = {Journal of Radioanalytical and Nuclear Chemistry},
number = 3,
volume = 319,
place = {United States},
year = {2019},
month = {1}
}

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Works referenced in this record:

Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
journal, September 1976