Fig. 8.
Results showing the twelve determinations of the paired values for the massic activities of 234U and 238 U as obtained from the isotope dilution α spectrometry. The cross represents the measured average values for A234U and A238U. The lengths of the dashed horizontal and vertical lines correspond to expanded uncertainties (k = 2) on A234U and A238U, respectively. The circle with solid horizontal and vertical bars represents the certified massic activities for A234U and A238U in SRM 4321d.