Oxygen isotope corrections for online δ 34 S analysis | Zendy

Fry Brian | Zendy; Silva Steven R. | Zendy; Kendall Carol | Zendy; Anderson Richard K. | Zendy

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Oxygen isotope corrections for online δ 34 S analysis

Author(s) -

Fry Brian,

Silva Steven R.,

Kendall Carol,

Anderson Richard K.

Publication year - 2002

Publication title -

rapid communications in mass spectrometry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.528

H-Index - 136

eISSN - 1097-0231

pISSN - 0951-4198

DOI - 10.1002/rcm.651

Subject(s) - chemistry , isotopes of oxygen , isotope , oxygen , isotope analysis , oxygen isotope ratio cycle , stable isotope ratio , isotopic ratio , oxygen 18 , analytical chemistry (journal) , isotope ratio mass spectrometry , yield (engineering) , mass spectrometry , delta , kinetic isotope effect , radiochemistry , environmental chemistry , deuterium , nuclear physics , nuclear chemistry , chromatography , geology , physics , oceanography , materials science , organic chemistry , aerospace engineering , engineering , metallurgy

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.

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