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  • 1 Tohoku University Laboratory of Nuclear Science Mikamine 982 Sendai (Japan)
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In order to study further the applicability of the newly developed stable isotope dilution method, simultaneous determination of Ca, Rb, Sr and Ce in three kinds of environmental materials has been tried by means of photon activation using isotopically enriched48Ca,87Rb,86Sr and142Ce as spikes. All determinations were demonstrated to be sensitive, highly specific and reasonably accurate.