Absolute isotope ratio determination of a natural boron standard

An absolute value for the isotope ratio of a natural boron stock has been determined by thermal ionization mass spectrometry of borax, using isotopic blends prepared from enriched 10B and 11B covering a 10B concentration range between 10 and 90%. The 10B/ 11B atom ratio of the natural boron stock is...

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Bibliographic Details
Published in:International journal of mass spectrometry and ion physics 1969, Vol.2 (1), p.15-23
Main Authors: De Bièvre, P.J., Debus, G.H.
Format: Article
Language:English
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Summary:An absolute value for the isotope ratio of a natural boron stock has been determined by thermal ionization mass spectrometry of borax, using isotopic blends prepared from enriched 10B and 11B covering a 10B concentration range between 10 and 90%. The 10B/ 11B atom ratio of the natural boron stock is 0.24726±0.00032, which corresponds to a 10B atom concentration of 19.824±0.020 (0.1 %) and an atomic weight of 10.81178±0.00020. Uncertainties are based on 95% confidence limits for the mean and estimates of maximum possible systematic errors.
ISSN:0020-7381
1873-3034
DOI:10.1016/0020-7381(69)80002-1