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A rapid and precise method for sampling and determining the oxygen isotope ratio of atmospheric water vapor
Author(s) -
Helliker Brent R.,
Roden John S.,
Cook Craig,
Ehleringer James R.
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.659
Subject(s) - chemistry , sampling (signal processing) , water vapor , analytical chemistry (journal) , environmental chemistry , optics , physics , organic chemistry , detector
A quantitative method for cryogenically sampling atmospheric water vapor on the temporal scale of 10 to 15 min in the field or laboratory is described. The sample apparatus is lightweight, affordable, and easy to assemble. The method allows for H 2 O:CO 2 equilibration within the same sampling tubes and hence increases turnaround time for δ 18 O analysis. Quantitative analysis in the laboratory showed recovery of a vaporized, known, 18 O water standard to 0.2‰ precision. Copyright © 2002 John Wiley & Sons, Ltd.