title: Determination of U and Th in urine by neutron activation.
abstract: Urinalysis for natural U and Th was done by neutron activation. Percent recovery (+/- 1 sigma) was 80 +/- 20 for U and 80 +/- 10 for Th. The method is sufficiently sensitive to detect, in a 100-ml sample, less than 1 and 6 micrograms/l. of 232Th and 238U, respectively.
mesh_terms: D002850:Chromatography, Gel / Q000379:methods; D005069:Evaluation Studies as Topic; D006801:Humans; D009501:Neutron Activation Analysis / Q000379:methods; D011834:Radiation Monitoring; D013910:Thorium / Q000652:urine*; D014501:Uranium / Q000652:urine*
chemical_list: D014501:Uranium; D013910:Thorium