Development and verification of a novel isotopic N 2 O measurement technique for discrete static chamber samples using cavity ring‐down spectroscopy

Autor: Saoirse R. Tracy, C. Bracken, Karl G. Richards, Reinhard Well, Paul N. C. Murphy, Gary Lanigan, Rachael Carolan, Christoph Müller
Rok vydání: 2021
Předmět:
Zdroj: Rapid Communications in Mass Spectrometry. 35
ISSN: 1097-0231
0951-4198
DOI: 10.1002/rcm.9049
Popis: RATIONALE N2 O isotopomers are a useful tool to study soil N cycling processes. The reliability of such measurements requires a consistent set of international N2 O isotope reference materials to improve inter-laboratory and inter-instrument comparability and avoid reporting inaccurate results. All these are the more important given the role of N2 O in anthropogenic climate change and the pressing need to develop our understanding of soil N cycling and N2 O emission to mitigate such emissions. Cavity ring-down spectroscopy (CRDS) could potentially overcome resource requirements and technical challenges, making N2 O isotopomer measurements more feasible and less expensive than previous approaches (e.g., gas chromatography [GC] and isotope ratio mass spectrometry [IRMS]). METHODS A combined laser spectrometer and small sample isotope module (CRDS & SSIM) method enabled N2 O concentration, δ15 Nbulk , δ15 Nα , δ15 Nβ and site preference (SP) measurements of sample volumes
Databáze: OpenAIRE
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