Determination of radionuclides in environmental test items at CPHR: traceability and uncertainty calculation.
Information about how the laboratory of Centro de Protección e Higiene de las Radiaciones (CPHR), Cuba establishes its traceability to the International System of Units for the measurement of radionuclides in environmental test items is presented. A comparison among different methodologies of uncertainty calculation, including an analysis of the feasibility of using the Kragten-spreadsheet approach, is shown. In the specific case of the gamma spectrometric assay, the influence of each parameter, and the identification of the major contributor, in the relative difference between the methods of uncertainty calculation (Kragten and partial derivative) is described. The reliability of the uncertainty calculation results reported by the commercial software Gamma 2000 from Silena is analyzed.
Centro de Protección e Higiene de las Radiaciones, P.O. Box 6195, La Habana, Cuba. carrazana@cphr.edu.cu
J
J
Carrazana González
I M
IM
Fernández
E
E
Capote Ferrera
G
G
Rodríguez Castro
D000465:Algorithms; D003462:Cuba; D003627:Data Interpretation, Statistical; D004781:Environmental Exposure / Q000032:analysis*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods* / Q000592:standards*; D011868:Radioisotopes / Q000032:analysis* / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D011868:Radioisotopes