Abstract
This paper presents a methodology for isotopic analysis of boron by thermal ionization mass spectrometry technique through the ion intensity measurement of Na{sub 2}BO{sup +}{sub 2} in H{sub 3}BO{sub 3}, B{sup o} and B{sub 4}C. The samples were loaded on single tantalum filaments by different methods. In the case of H{sub 3}BO{sub 3}, the method of neutralization with NaOH was used. For B{sub 4}C the alcaline fusion with Na{sub 2}CO{sub 3} and for B{sup o} dissolution with 1:1 nitric sulfuric acid mixture followed by neutralization with NaOH was used. The isotopic ratio measurements were obtained by the use of s Faraday cup detector with external precision of {+-}0,4% and accuracy of {+-}0,1%, relative to H{sub 3}BO{sub 3} isotopic standard NBS 951. The effects of isotopic fractionation was studied in function of the time during the analyses and the different chemical forms of deposition. (author).
Citation Formats
Kakazu, M H, Sarkis, J E.S., and Souza, I M.S.
Isotopic analysis of boron by thermal ionization mass spectrometry; Analises isotopicas de boro por espectrometria de massa termoionica.
Brazil: N. p.,
1991.
Web.
Kakazu, M H, Sarkis, J E.S., & Souza, I M.S.
Isotopic analysis of boron by thermal ionization mass spectrometry; Analises isotopicas de boro por espectrometria de massa termoionica.
Brazil.
Kakazu, M H, Sarkis, J E.S., and Souza, I M.S.
1991.
"Isotopic analysis of boron by thermal ionization mass spectrometry; Analises isotopicas de boro por espectrometria de massa termoionica."
Brazil.
@misc{etde_10111308,
title = {Isotopic analysis of boron by thermal ionization mass spectrometry; Analises isotopicas de boro por espectrometria de massa termoionica}
author = {Kakazu, M H, Sarkis, J E.S., and Souza, I M.S.}
abstractNote = {This paper presents a methodology for isotopic analysis of boron by thermal ionization mass spectrometry technique through the ion intensity measurement of Na{sub 2}BO{sup +}{sub 2} in H{sub 3}BO{sub 3}, B{sup o} and B{sub 4}C. The samples were loaded on single tantalum filaments by different methods. In the case of H{sub 3}BO{sub 3}, the method of neutralization with NaOH was used. For B{sub 4}C the alcaline fusion with Na{sub 2}CO{sub 3} and for B{sup o} dissolution with 1:1 nitric sulfuric acid mixture followed by neutralization with NaOH was used. The isotopic ratio measurements were obtained by the use of s Faraday cup detector with external precision of {+-}0,4% and accuracy of {+-}0,1%, relative to H{sub 3}BO{sub 3} isotopic standard NBS 951. The effects of isotopic fractionation was studied in function of the time during the analyses and the different chemical forms of deposition. (author).}
place = {Brazil}
year = {1991}
month = {Jul}
}
title = {Isotopic analysis of boron by thermal ionization mass spectrometry; Analises isotopicas de boro por espectrometria de massa termoionica}
author = {Kakazu, M H, Sarkis, J E.S., and Souza, I M.S.}
abstractNote = {This paper presents a methodology for isotopic analysis of boron by thermal ionization mass spectrometry technique through the ion intensity measurement of Na{sub 2}BO{sup +}{sub 2} in H{sub 3}BO{sub 3}, B{sup o} and B{sub 4}C. The samples were loaded on single tantalum filaments by different methods. In the case of H{sub 3}BO{sub 3}, the method of neutralization with NaOH was used. For B{sub 4}C the alcaline fusion with Na{sub 2}CO{sub 3} and for B{sup o} dissolution with 1:1 nitric sulfuric acid mixture followed by neutralization with NaOH was used. The isotopic ratio measurements were obtained by the use of s Faraday cup detector with external precision of {+-}0,4% and accuracy of {+-}0,1%, relative to H{sub 3}BO{sub 3} isotopic standard NBS 951. The effects of isotopic fractionation was studied in function of the time during the analyses and the different chemical forms of deposition. (author).}
place = {Brazil}
year = {1991}
month = {Jul}
}