| Popis: |
Environmental radiochemistry needs, for use in analytical inter-comparison and as standard reference materials, very large homogeneous samples of a variety of matrices, each naturally contaminated by a variety of longer-lived radionuclides, at several different ranges of concentrations. The reasons for this need are discussed, and the minimum assortment of matrices, of radionuclides, and of concentrations is established. Sources of suitable materials are suggested, and the international approach to meeting this need is emphasized. Keywords: Analytical intercomparisons, standard reference materials, natural matrices, environmental radiochemistry, spiked standards, sample dissolution, isotopic equilibration, metabolically contaminated samples |
