New Procedures for Uranium Isotope Ratio Measurements using the Triton Thermal Ionization Mass Spectrometer

In February 2004 the new Triton Thermal Ionization Mass Spectrometer from Thermo Electron has been installed at IRMM. For uranium isotope ratio measurements on the Triton at IRMM two basic techniques have been introduced and validated, namely the MTE- (¿Modified Total Evaporation¿) and the HI (¿High Intensity¿) techniques. The performance of these techniques is considered excellent for uranium isotope ration measurements to be performed at IRMM. Data obtained for the IRMM-183-187 series will be used to recertify the minor uranium ratios for these well know reference materialsJRC.D.4-Isotope measurement