BIPM comparison BIPM.RI(II)-K1.Ga-67 of activity measurements of the radionuclide 67Ga

Since 1978, seven national metrology institutes (NMIs) and one other laboratory have submitted 12 samples of known activity of Ga-67 to the International Reference System (SIR) for activity comparison at the Bureau International des Poids et Mesures. The activities ranged from about 4 MBq to 600 MBq. The degrees of equivalence between each equivalent activity measured in the SIR and the key comparison reference value (KCRV) have been calculated and the results are given in the form of a matrix for seven NMIs. A graphical presentation is also given.