title: AN INTERLABORATORY COMPARISON ON THE DETERMINATION OF 241Am, 244Cm AND 252Cf IN URINE.
abstract: An intercomparison exercise on the determination of (241)Am, (244)Cm and (252)Cf in urine was performed. Since it was designed with regard to emergency preparedness, the detection limit for each nuclide was set to 0.1 Bq per 24-h urine sample. Most of the participating laboratories were established bioassay laboratories. However, some laboratories that routinely determine (241)Am only in environmental samples were also invited in order to explore their potential for emergency bioassay analysis. Another aspect of the intercomparison was to investigate the performance of all laboratories concerning the chemical yields of the (243)Am tracer in comparison with (244)Cm and (252)Cf. In summary, both types of laboratories showed good results. There was a negative bias for the results of (244)Cm and (252)Cf, which can be explained by slightly different radiochemical behaviours of americium, curium and californium and which is in agreement with results reported in the literature.
authors.affiliation: Department of Radiation Protection and Health, BfS-Federal Office for Radiation Protection, Köpenicker Allee 120-130, 10318 Berlin, Germany ugerstmann@bfs.de.
authors.forename: Udo C
authors.initials: UC
authors.lastname: Gerstmann
authors.affiliation: Department of Radiation Protection and Health, BfS-Federal Office for Radiation Protection, Köpenicker Allee 120-130, 10318 Berlin, Germany.
authors.forename: Kerstin
authors.initials: K
authors.lastname: Taubner
authors.affiliation: Department of Radiation Protection and Health, BfS-Federal Office for Radiation Protection, Köpenicker Allee 120-130, 10318 Berlin, Germany.
authors.forename: Martina
authors.initials: M
authors.lastname: Hartmann
mesh_terms: D000576:Americium / Q000652:urine*; D001681:Biological Assay / Q000379:methods*; D002142:Californium / Q000652:urine*; D002845:Chromatography; D003476:Curium / Q000652:urine*; D006801:Humans; D007753:Laboratories / Q000592:standards*; D057230:Limit of Detection; D011834:Radiation Monitoring; D011854:Radiochemistry / Q000295:instrumentation* / Q000379:methods; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D016482:Urinalysis
chemical_list: D002142:Californium; D003476:Curium; D000576:Americium