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Title: Chromatographic separation of the theranostic radionuclide 111Ag from a proton irradiated thorium matrix

Journal Article · · Analytica Chimica Acta

Column chromatographic methods have been developed to separate no-carrier-added 111Ag from proton irradiated thorium targets and associated fission products as an ancillary process to an existing 225Ac separation design. Herein we report the separation of 111Ag both prior and subsequent to 225Ac recovery using CL resin, a solvent impregnated resin (SIR) that carries an organic solution of alkyl phosphine sulfides (R3P = S) and alkyl phosphine oxides (R3P = O). The recovery yield of 111Ag was 93 ± 9% with a radiochemical purity of 99.9% (prior) and 87 ± 9% with a radiochemical purity of 99.9% (subsequent to) 225Ac recovery. Both processes were successfully performed with insignificant impacts on 225Ac yields or quality. Measured equilibrium distribution coefficients for silver and ruthenium (a residual contaminant) on CL resin in hydrochloric and nitric acid media are reported, to the best of our knowledge, for the first time. Additionally, measured cross sections for the production of 111Ag and 110mAg for the 232Th(p,f)110m,111Ag reactions are reported within.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); LANL Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396; AC05-00OR22725; LDRD 20160439ER
OSTI ID:
1409773
Alternate ID(s):
OSTI ID: 1435228; OSTI ID: 1562756
Report Number(s):
LA-UR-17-23917
Journal Information:
Analytica Chimica Acta, Vol. 998; ISSN 0003-2670
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (2)

Defining Processing Times for Accelerator Produced 225Ac and Other Isotopes from Proton Irradiated Thorium journal March 2019
Selective biosorption of thorium (IV) from aqueous solutions by ginkgo leaf journal March 2018

Figures / Tables (5)