The influence of uncertainties of measurements in laboratory performance evaluation using an intercomparison program of radionuclide assays in environmental samples
| Autor: | Almir Faria Clain, Maria Elizabeth Couto Machado Vianna, Maura Julia Câmara da Silva Bragança, Luiz Tauhata, Ana Cristina de Melo Ferreira, Antonio Eduardo de Oliveira |
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| Rok vydání: | 2006 |
| Předmět: |
Quality Control
Radioisotopes Radionuclide Radiation Reproducibility of Results Guidelines as Topic Sensitivity and Specificity Radiation Monitoring Reference Values Reference values Radionuclide metrology Statistics Normalized standard deviation Environmental science Environmental Pollutants Laboratories Brazil |
| Zdroj: | Applied Radiation and Isotopes. 64:1174-1178 |
| ISSN: | 0969-8043 |
| DOI: | 10.1016/j.apradiso.2006.02.084 |
| Popis: | To show the influence of measurement uncertainties in performance evaluation of laboratories, data from 42 comparison runs were evaluated using two statistical criteria. The normalized standard deviation, D, used by US EPA, that mainly takes into account the accuracy, and the normalized deviation, E, that includes the individual laboratory uncertainty used for performance evaluation in the key-comparisons by BIPM. The results show that data evaluated by the different criteria give a significant deviation of laboratory performance in each radionuclide assay when we analyse a large quantity of data. |
| Databáze: | OpenAIRE |
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