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

Pathirana, S. L.; van der Veen, C.; Popa, M. E.; Röckmann, T.

doi:https://doi.org/10.5194/amt-8-5315-2015

Articles | Volume 8, issue 12

https://doi.org/10.5194/amt-8-5315-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-8-5315-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 8, issue 12

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, C. van der Veen, M. E. Popa, and T. Röckmann

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Final revised paper (published on 21 Dec 2015)
Preprint (discussion started on 19 Feb 2015)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC C244: 'Review report', Anonymous Referee #1, 05 Mar 2015
- AC C1733: 'Response to Referee #1', Supun Pathirana, 29 Jun 2015
RC C705: 'Comments to “An analytical system for studying the stable isotopes of carbon monoxide using continuous flow-isotope ratio mass spectrometry (CF-IRMS)” by Pathirana et al.', Anonymous Referee #2, 17 Apr 2015
- AC C1739: 'Response to Referee #2', Supun Pathirana, 29 Jun 2015

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.