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  • Title: Characterisation of the IAEA-152 milk powder reference material for radioactivity with assigned values traceable to the SI units.
    Author: Altzitzoglou T, Bohnstedt A, International Atomic Energy Agency.
    Journal: Appl Radiat Isot; 2008 Nov; 66(11):1702-5. PubMed ID: 18515120.
    Abstract:
    The Institute for Reference Materials and Measurements (IRMM) participated in a research project initiated by the International Atomic Energy Agency (IAEA) to upgrade some of its existing reference materials (RMs). The aim of the project is to improve the RM metrological status by establishing traceability of their assigned values to SI units. The purpose of the work described in this article was to establish traceability to the International System of Units (SI) of the activity concentrations of the radionuclides (134)Cs, (137)Cs, (40)K, and (90)Sr in the IAEA-152 milk powder RM. The choice of the particular RM was based on the concern about radioactivity levels in foodstuff. The sample preparation and the assaying of the activity concentrations in the milk powder, the methods used to achieve instrument calibrations and measurements traceable to the SI units, the data reduction and analysis, and finally, the results obtained are presented.
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