Abstract
Boron isotope ratio measurements are carried out by negative thermal ionization mass spectrometry. For that purpose, a boron compound together with a lanthanum nitrate addition is deposited on the filament of a single-filament thermal ion source. At a filament temperature of 1000°C negative boron dioxide ions are measured, producing an ion intensity which is a factor 100–1000 higher in comparison with the positive thermal ion beam. Without lanthanum addition, the attainable negative ion beam is lower by a factor of 0.001–0.0001. Using boracic acid, borax and sodium fluoborate for sample, relative external standard deviations of 0.08 % are available for the boron isotope ratio measurement.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Mass Spectrometry and Ion Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
