Articles | Volume 8, issue 12
Atmos. Meas. Tech., 8, 5315–5324, 2015
Atmos. Meas. Tech., 8, 5315–5324, 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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Cited articles

Brenninkmeijer, C. A. M.: Measurement of the abundance of 14CO in the atmosphere and the 13C / 12C and 18O / 16O ratio of atmospheric CO with applications in New Zealand and Antarctica, J. Geophys. Res., 98, 614, 10510–10595, 1993.
Brenninkmeijer, C. A. M. and Röckmann, T.: Principal factors determining ratio of atmospheric CO as derived from observations in the southern hemispheric troposphere and lower statosphere, J. Geophys. Res., 102, 477–485, 1997.
Brenninkmeijer, C. A. M., Röckmann, T., Bräunlich, M., Jöckel, P., and Bergamaschi, P.: Review of progress in isotope studies of atmospheric carbon monoxide, Chemosphere-Global Chang. Sci., 1, 33–52, 1999.
Crutzen, P. and Zimmermann, P.: The changing photochemistry of the troposphere, Tellus B, 43 AB, 136–151, 1991.
Hartmann, D. L., Tank, A. M. G. K., Rusticucci, M., Alexander, L. V., Brönnimann, S., Charabi, Y., Dentener, F. J., Dlugokencky, E. J., Easterling, D. R., Kaplan, A., Soden, B. J., Thorne, P. W., Wild, M., and Zhai, P. M.: Observations: Atmosphere and Surface, in: Climate Change 2013 – The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., 159–254, Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, Cambridge, 2014.
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.