Magnesium isotope ratio measurements by negative thermal ionization mass spectrometry using molecular fluoride ionsFunded under: FP4-SMT
A new technique for accurate Mg isotope ratio measurements has been developed with MgF(2) as sample compound. With the help of fluorinating agent negatively charged MgF(3) molecular ions were formed in the ion source of a thermal ionization mass spectrometer. An evaporation study has been performed and the results clearly show that Mg is evaporated from the filament as MgF(2) molecules. The MgF(2) technique has been applied in the certification of a candidate. The result from this technique has been compared with results obtained from the same material using ICP-MS. For even lighter elements, with larger relative isotope mass differences, these effects will be enhanced. Candidates for the use of solid fluoride compounds in N-TIMS are all elements forming a solid fluoride compound. In this work, procedures for sample loading and mass spectrometric measurement of Mg, applying the N-TIMS fluorination technique, have been developed.
Bibliographic Reference: Article: Fresenius Journal Analytical Chemistry, 364 (1999), 478-481pp.
Record Number: 199911742 / Last updated on: 2000-01-30
Original language: en
Available languages: en