Measurement of the Atomic Weight of Ruthenium by Negative Thermal Ionization Mass Spectrometry

摘要

Methods for ruthenium isotope measurement by both positive and negative ion thermal ionization mass spectrometry (PTI-MS and NTI-MS, respectively) are studied in this work, We found that Ru isotopes 100 and 104 are subjected to isobaric interferences from the silica gel used to improve sensitivity in PTI-MS. Measurement of ruthenium isotopes by NTI_MS is dis- cussed here. The method is proved to be sensitive and free from the isobaric interferences.