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Separation of Protactinium Employing Sulfur-Based Extraction Chromatographic Resins

Journal Article · · Analytical Chemistry

Protactinium-230 (t1/2 = 17.4 d) is the parent isotope of 230U (t1/2 = 20.8 d), a radionuclide of interest for targeted alpha therapy (TAT). Column chromatographic methods have been developed to separate no-carrier-added 230Pa from proton irradiated thorium targets and accompanying fission products. Results reported within this paper demonstrate the use of novel sulfur bearing chromatographic extraction resins for the selective separation of protactinium. The recovery yield of 230Pa was 93 ± 4% employing a R3P=S type commercially available resin and 88 ± 4% employing a DGTA (diglycothioamide) containing custom synthesized extraction chromatographic resin. The radiochemical purity of the recovered 230Pa was measured via high purity germanium γ-ray spectroscopy to be >99.5% with the remaining radioactive contaminant being 95Nb due to its similar chemistry to protactinium. Finally, measured equilibrium distribution coefficients for protactinium, thorium, uranium, niobium, radium, and actinium on both the R3P=S type and the DGTA resin in hydrochloric acid media are reported, to the best of our knowledge, for the first time.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC52-06NA25396; AC05-00OR22725
OSTI ID:
1440455
Report Number(s):
LA-UR--18-22616
Journal Information:
Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 11 Vol. 90; ISSN 0003-2700
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Microfluidics-based separation of actinium-225 from radium-225 for medical applications journal May 2019

Figures / Tables (5)