Instrumental neutron activation analysis results for 20 trace elements (Sc, Cr, Co, Ni, Rb, Cs,
Ba, La, Ce, Nd, Sm, Eu, Gd, Tb, Tm, Yb, Lu, Hf, Ta, Th) and for two major elements (Na and
Fe) in two geochemical reference samples issued by the “Centre de Recherches
Pétrographiques et Géochimiques” are reported and compared with available literature
values. In general our results agree well with recommended or proposed values.

… French geochemical reference samples (GRS): Basalt BR, Granites, GA, GH and GS-N,
Diorite DR-N, Bioti';e Mica-Fe, Phlogopite Mica-Mg, Feldspath FK-N, Glauconi te GI.-0,
Serpentine UB-N and Disthene DT-N were analyzed for 20 major and trace elements by
intrumental neutron activation analysis (INAA). INAA is a widely used method for trace elements,
especially the rare earth elements (REE.). The INAA technique is described by Gordon et a1 . …
Canparison of recommended or proposed values for trace elements in the French geochmical …