This method describes the determination of the isotope-amount ratios of uranium material as nitrate solutions by the modified total evaporation (MTE) method using a thermal ionization mass spectrometer (TIMS) instrument. Compared to the classical total evaporation method (C1672-07) the new MTE method allows to measure the minor isotope ratios 234U/238 and 236U/238U with significantly improved precision and accuracy.
KeywordsMTE; Modified Total Evaporation; Spectrometer
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as C1832-2016 and Pending Publication