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Isotopic analysis of boron by thermal ionization mass spectrometry; Analises isotopicas de boro por espectrometria de massa termoionica

Technical Report:

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).
Publication Date:
Jul 01, 1991
Product Type:
Technical Report
Report Number:
IPEN-PUB-340
Reference Number:
SCA: 400102; PA: AIX-23:010558; SN: 92000637539
Resource Relation:
Other Information: PBD: Jul 1991
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BORON; ISOTOPE RATIO; MASS SPECTROSCOPY; 400102; CHEMICAL AND SPECTRAL PROCEDURES
OSTI ID:
10111308
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Other: ON: DE92613308; TRN: BR9228285010558
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
32 p.
Announcement Date:
Jun 30, 2005

Technical Report:

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}
}