ABSTRACT
V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry. Russian Academy of Sciences, Moscow
General characteristics of mass spectrometric methods for the determination of isotopic composition of light elements
Laser ionization mass spectrometry (LIMS) The most common devices when working with laser ion sources are double-focusing mass spectrometers, built on the basis of the MattauchHerzog ion-optical scheme. The main advantage of this system is the simultaneous recording of ions in a wide mass range. Ions are detected by a photoplate, which limits the accuracy of isotope measurements. The relevant accuracy is typically a few percent. In [1] the results are presented of determination in a magnetic mass spectrometer with a laser ion source of isotopic ratios 18O/17O and 18O/16O in samples of UO2 in layer analysis with an accuracy of 10%.
