title: Determination of Atto- to Femtogram Levels of Americium and Curium Isotopes in Large-Volume Urine Samples by Compact Accelerator Mass Spectrometry.
abstract: Ultralow level analysis of actinides in urine samples may be required for dose assessment in the event of internal exposures to these radionuclides at nuclear facilities and nuclear power plants. A new bioassay method for analysis of sub-femtogram levels of Am and Cm in large-volume urine samples was developed. Americium and curium were co-precipitated with hydrous titanium oxide from the urine matrix and purified by column chromatography separation. After target preparation using mixed titanium/iron oxides, the final sample was measured by compact accelerator mass spectrometry. Urine samples spiked with known quantities of Am and Cm isotopes in the range of attogram to femtogram levels were measured for method evaluation. The results are in good agreement with the expected values, demonstrating the feasibility of compact accelerator mass spectrometry (AMS) for the determination of minor actinides at the levels of attogram/liter in urine samples to meet stringent sensitivity requirements for internal dosimetry assessment.
authors.affiliation: Canadian Nuclear Laboratories, Chalk River, Ontario K0J 1J0, Canada.
authors.forename: Xiongxin
authors.initials: X
authors.lastname: Dai
authors.affiliation: Laboratory of Ion Beam Physics, ETH Zurich , 8093 Zurich, Switzerland.
authors.forename: Marcus
authors.initials: M
authors.lastname: Christl
authors.affiliation: Canadian Nuclear Laboratories, Chalk River, Ontario K0J 1J0, Canada.
authors.forename: Sheila
authors.initials: S
authors.lastname: Kramer-Tremblay
authors.affiliation: Laboratory of Ion Beam Physics, ETH Zurich , 8093 Zurich, Switzerland.
authors.forename: Hans-Arno
authors.initials: HA
authors.lastname: Synal
mesh_terms: D000576:Americium / Q000652:urine*; D003476:Curium / Q000652:urine*; D007554:Isotopes; D057230:Limit of Detection; D013058:Mass Spectrometry / Q000379:methods*
chemical_list: D007554:Isotopes; D003476:Curium; D000576:Americium