Near-absolute gas (isotope) mass spectrometry : Isotope abundance (and atomic weight) determinations of boron and carbon
Extensive use has been made of fluorination and fluoride gas measurement expertise at IRMM, developed for silicon isotopic measurements on SiF(4) in the Avogadro project using an upgraded Finnigan MAT 271 gas mass spectrometer (the Avogadro mass spectrometer). First results obtained on 13C/12C abundance ratios of a commercial CF(4) gas led to a carbon atomic weight of 12.010 674 6 +/- 0.000 000 4 for the sample used. First results observed on the 10B/11B abundance ratio of a commercial BF(3) sample yielded an atomic weight of 10.810 588 1 +/- 0.000 005 8. Comparison to the IUPAC recommended best measurements for isotopic composition, obtained on samples from a different single source, is favourable for both elements. The measurement method and the chemical fluorination procedures are described.
Bibliographic Reference: Paper presented: Third International Symposium on Separation Technology, Antwerpen (BE), August 22-27, 1993
Availability: Available from (1) as Paper EN 37511 ORA
Record Number: 199311305 / Last updated on: 1994-11-28
Original language: en
Available languages: en