Articles | Volume 8, issue 12
Atmos. Meas. Tech., 8, 5315–5324, 2015
https://doi.org/10.5194/amt-8-5315-2015
Atmos. Meas. Tech., 8, 5315–5324, 2015
https://doi.org/10.5194/amt-8-5315-2015

Research article 21 Dec 2015

Research article | 21 Dec 2015

An analytical system for stable isotope analysis on carbon monoxide using continuous-flow isotope-ratio mass spectrometry

S. L. Pathirana et al.

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Short summary
CO is established as an important indirect greenhouse gas, as it is the major sink for the OH∙. We have developed a fully automated system for the determination of δ13C and δ18O in atmospheric CO. The blank signal of the Schütze reagent is 1-3 % of the typical sample size. The repeatability is 0.1 ‰ for δ13C and 0.2 ‰ for δ18O. The analytical repeatability for the mole fraction is ~0.7 nmol mol-1 for 100 mL of ambient air (185.4 nmol mol-1 of CO). A single measurement is performed in 18 min.