A new Shellfish Standard Reference Material (SRM 4358) was developed at the National Institute of Standards and Technology (NIST) via an international intercomparison project that involved 12 laboratories-participants from 9 countries (Table 1). This Standard Reference Material (SRM) has been developed in cooperation with member laboratories of the International Committee for Radionuclide Metrology and other experienced metrology laboratories. The SRM consists of approximately 150 grams shellfish powder that was freeze-dried, pulverized, bottled, and sterilized. The SRM is intended for use in tests of measurements of radioactivity contained in matrices similar to the sample, for evaluating analytical methods, and as a generally available calibrated real sample matrix for laboratory intercomparison. The results from the participants were statistically evaluated, and the most robust certified values were the median of laboratories reported mean values; the uncertainties of the certified values were derived using the bootstrap method. Certified values were established for 14 radionuclides, 5 activity ratios, and informational values for 8 more radionuclides and 2 ratios.
Citation: Journal of Radioanalytical and Nuclear Chemistry
Pub Type: Journals
certified values, informational values, interlaboratory comparison, radionuclide, shellfish, Standard Reference Material, uncertainties