Oxygen isotope corrections for online δ 34 S analysis
Authors:
- 20 March 2002
- journal article
- research article
- Published by Wiley in Rapid Communications in Mass Spectrometry
- Vol. 16 (9) , 854-858
Abstract
Elemental analyzers have been successfully coupled to stable‐isotope‐ratio mass spectrometers for online measurements of the δ 34 S isotopic composition of plants, animals and soils. We found that the online technology for automated δ 34 S isotopic determinations did not yield reproducible oxygen isotopic compositions in the SO 2 produced, and as a result calculated δ 34 S 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 SO 2 ‐SiO 2 buffering method that minimizes detrimental oxygen isotope variations in SO 2 . Published in 2002 by John Wiley & Sons, Ltd.Keywords
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