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Effects of nitrate and water on the oxygen isotopic analysis of barium sulfate precipitated from water samples

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Effects of nitrate and water on the oxygen isotopic analysis of barium sulfate precipitated from solution; 2008; Article; Journal; Rapid Communications in Mass Spectrometry; Janet E Hannon;Johnkarl F Bohlke;Stanley J Mroczkowski

Summary

BaSO4 precipitated from mixed salt solutions by common techniques for SO isotopic analysis may contain quantities of H2O and NO that introduce errors in O isotope measurements. Experiments with synthetic solutions indicate that δ18O values of CO produced by decomposition of precipitated BaSO4 in a carbon reactor may be either too low or too high, depending on the relative concentrations of SO and NO and the δ18O values of the H2O, NO, and SO. Typical δ18O errors are of the order of 0.5 to 1‰ in many sample types, and can be larger in samples containing atmospheric NO, which can cause similar errors in δ17O and Δ17O. These errors can be reduced by (1) ion chromatographic separation of SO from NO, (2) increasing the salinity of the solutions [...]

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Type Scheme Key
local-index unknown 70042350
local-pk unknown 70042350
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1002/rcm.3832
series unknown Rapid Communications in Mass Spectrometry

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journalRapid Communications in Mass Spectrometry
parts
typevolume
value22
typeissue
value24
languageEnglish
citationTypeArticle

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