isotope dilution
4.DETERMINATION OF TRACE RE ELEMENTS BY ISOTOPE DILUTION MASS SPECTROMETRY (IDMS)
8.DETERMINATION OF THE URANIUM CONTENT AND 234U/238U ISOTOPE RATIO IN NATURAL WATER BY ISOTOPE DILUTION ALPHA SPECTROMETRY.
10.THE SIMULTANEOUS DETERMINATION OF TRACE Sm, Gd AND Eu IN U_3O_8BY ISOTOPE DILUTION MASS SPECTROMETRY

