Simultaneous determination of Ca,Rb, Sr and Ce in environmental materials by photon activation analysis using the stable isotope dilution method

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.