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Oxygen isotope corrections for online δ34S analysis

Rapid Communications in Mass Spectrometry

By:
, , , and
DOI: 10.1002/rcm.651

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Abstract

Elemental analyzers have been successfully coupled to stable-isotope-ratio mass spectrometers for online measurements of the δ34S isotopic composition of plants, animals and soils. We found that the online technology for automated δ34S isotopic determinations did not yield reproducible oxygen isotopic compositions in the SO2 produced, and as a result calculated δ34S values were often 1–3‰ too high versus their correct values, particularly for plant and animal samples with high C/S ratio. Here we provide empirical and analytical methods for correcting the S isotope values for oxygen isotope variations, and further detail a new SO2-SiO2 buffering method that minimizes detrimental oxygen isotope variations in SO2.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Oxygen isotope corrections for online δ34S analysis
Series title:
Rapid Communications in Mass Spectrometry
DOI:
10.1002/rcm.651
Volume
16
Issue:
9
Year Published:
2002
Language:
English
Publisher:
Wiley
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Rapid Communications in Mass Spectrometry
First page:
854
Last page:
858