APPLICATION OF THE OXIDE FRACTIONATION FOR CORRECTION OF URANIUM FRACTIONATION IN THERMAL IONIZATION MASS SPECTROMETRY

摘要

A methodology for correcting the fractionation of uranium isotopes during thermal ionization mass spectrometric analysis is evaluated. Using UO~+ ions for analysis, the fractionation of the oxygen isotopes is correlated to the fractionation in U data using different certified isotopic standards of uranium for analysis. It has been found that more than 99.9% fractionation in the uranium analysis can be accounted for in this method. The reproducibility of the methodology was evaluated using the principal component analysis of the experimental data performed over a wide period of time.