Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 311, Issue 1, Pages 617-626Publisher
SPRINGER
DOI: 10.1007/s10967-016-5005-0
Keywords
Nuclear forensics; Thermogravimetric analysis; Thermochromatography; Rapid separations; Hexafluoroacetylacetone; Lanthanides
Funding
- Stewardship Science Academic Alliances (SSAA) Program of the National Nuclear Security Administration (NNSA) [DE-NA0001983]
- U.S. Department of Homeland Security [2012-DN-130-NF0001]
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This work reports the thermodynamic characterizations of organometallic species as a vehicle for the rapid separation of volatile nuclear fission products via gas chromatography due to differences in adsorption enthalpy. Because adsorption and sublimation thermodynamics are linearly correlated, there is considerable motivation to determine sublimation enthalpies. A method of isothermal thermogravimetric analysis, TGA-MS and melting point analysis are employed on thirteen lanthanide 1,1,1,5,5,5-hexafluoroacetylacetone complexes to determine sublimation enthalpies. An empirical correlation is used to estimate adsorption enthalpies of lanthanide complexes on a quartz column from the sublimation data. Additionally, four chelates are characterized by SC-XRD, elemental analysis, FTIR and NMR.
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