Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy : method development and first intercomparison results. / Eyer, S; B, Tuzson; Popa, M.E.; van der veen, C.; Rockmann, Thomas; Rothe, M.; Brand, W.A.; Fisher, Rebecca; Lowry, David; Nisbet, Euan; Brennwald, M.S.; Harris, E.; Zellweger, C; Emmenegger, L.; Fischer, H.; Mohn, J.

In: Atmospheric Measurement Techniques, Vol. 9, No. 1, 27.01.2016, p. 263-280.

Research output: Contribution to journalArticlepeer-review

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Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy : method development and first intercomparison results. / Eyer, S; B, Tuzson; Popa, M.E.; van der veen, C.; Rockmann, Thomas; Rothe, M.; Brand, W.A.; Fisher, Rebecca; Lowry, David; Nisbet, Euan; Brennwald, M.S.; Harris, E.; Zellweger, C; Emmenegger, L.; Fischer, H.; Mohn, J.

In: Atmospheric Measurement Techniques, Vol. 9, No. 1, 27.01.2016, p. 263-280.

Research output: Contribution to journalArticlepeer-review

Harvard

Eyer, S, B, T, Popa, ME, van der veen, C, Rockmann, T, Rothe, M, Brand, WA, Fisher, R, Lowry, D, Nisbet, E, Brennwald, MS, Harris, E, Zellweger, C, Emmenegger, L, Fischer, H & Mohn, J 2016, 'Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy: method development and first intercomparison results', Atmospheric Measurement Techniques, vol. 9, no. 1, pp. 263-280. https://doi.org/10.5194/amt-9-263-2016

APA

Eyer, S., B, T., Popa, M. E., van der veen, C., Rockmann, T., Rothe, M., Brand, W. A., Fisher, R., Lowry, D., Nisbet, E., Brennwald, M. S., Harris, E., Zellweger, C., Emmenegger, L., Fischer, H., & Mohn, J. (2016). Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy: method development and first intercomparison results. Atmospheric Measurement Techniques, 9(1), 263-280. https://doi.org/10.5194/amt-9-263-2016

Vancouver

Eyer S, B T, Popa ME, van der veen C, Rockmann T, Rothe M et al. Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy: method development and first intercomparison results. Atmospheric Measurement Techniques. 2016 Jan 27;9(1):263-280. https://doi.org/10.5194/amt-9-263-2016

Author

Eyer, S ; B, Tuzson ; Popa, M.E. ; van der veen, C. ; Rockmann, Thomas ; Rothe, M. ; Brand, W.A. ; Fisher, Rebecca ; Lowry, David ; Nisbet, Euan ; Brennwald, M.S. ; Harris, E. ; Zellweger, C ; Emmenegger, L. ; Fischer, H. ; Mohn, J. / Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy : method development and first intercomparison results. In: Atmospheric Measurement Techniques. 2016 ; Vol. 9, No. 1. pp. 263-280.

BibTeX

@article{7d8b46499dc842279753262e00e2e701,
title = "Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy: method development and first intercomparison results",
abstract = "In situ and simultaneous measurement of the three most abundant isotopologues of methane using midinfrared laser absorption spectroscopy is demonstrated. A field-deployable, autonomous platform is realized by coupling a compact quantum cascade laser absorption spectrometer (QCLAS) to a preconcentration unit, called trace gas extractor (TREX). This unit enhances CH4 mole fractions by a factor of up to 500 above ambient levels and quantitatively separates interfering trace gases such as N2O and CO2. The analytical precision of the QCLAS isotope measurement on the preconcentrated (750 ppm, partsper million, μmole mole−1) methane is 0.1 and 0.5 ‰ for δ13C- and δD- CH4 at 10 min averaging time.Based on repeated measurements of compressed air during a 2-week intercomparison campaign, the repeatability of the TREX–QCLAS was determined to be 0.19 and 1.9‰ for δ13C and δD-CH4, respectively. In this intercomparison campaign the new in situ technique is compared to isotoperatio mass spectrometry (IRMS) based on glass flask and bag sampling and real time CH4 isotope analysis by two commercially available laser spectrometers. Both laserbased analyzers were limited to methane mole fraction and δ13C-CH4 analysis, and only one of them, a cavity ring down spectrometer, was capable to deliver meaningful data for the isotopic composition. After correcting for scale offsets, the average difference between TREX–QCLAS data and bag/flask sampling–IRMS values are within the extended WMO compatibility goals of 0.2 and 5‰ for δ13C- and δD-CH4, respectively. This also displays the potential to improve the interlaboratory compatibility based on the analysis of a reference air sample with accurately determined isotopic compsition.",
author = "S Eyer and Tuzson B and M.E. Popa and {van der veen}, C. and Thomas Rockmann and M. Rothe and W.A. Brand and Rebecca Fisher and David Lowry and Euan Nisbet and M.S. Brennwald and E. Harris and C Zellweger and L. Emmenegger and H. Fischer and J. Mohn",
year = "2016",
month = jan,
day = "27",
doi = "10.5194/amt-9-263-2016",
language = "English",
volume = "9",
pages = "263--280",
journal = "Atmospheric Measurement Techniques",
issn = "1867-1381",
publisher = "Copernicus Gesellschaft mbH",
number = "1",

}

RIS

TY - JOUR

T1 - Real-time analysis of δ13C- and δD-CH4 in ambient air with laser spectroscopy

T2 - method development and first intercomparison results

AU - Eyer, S

AU - B, Tuzson

AU - Popa, M.E.

AU - van der veen, C.

AU - Rockmann, Thomas

AU - Rothe, M.

AU - Brand, W.A.

AU - Fisher, Rebecca

AU - Lowry, David

AU - Nisbet, Euan

AU - Brennwald, M.S.

AU - Harris, E.

AU - Zellweger, C

AU - Emmenegger, L.

AU - Fischer, H.

AU - Mohn, J.

PY - 2016/1/27

Y1 - 2016/1/27

N2 - In situ and simultaneous measurement of the three most abundant isotopologues of methane using midinfrared laser absorption spectroscopy is demonstrated. A field-deployable, autonomous platform is realized by coupling a compact quantum cascade laser absorption spectrometer (QCLAS) to a preconcentration unit, called trace gas extractor (TREX). This unit enhances CH4 mole fractions by a factor of up to 500 above ambient levels and quantitatively separates interfering trace gases such as N2O and CO2. The analytical precision of the QCLAS isotope measurement on the preconcentrated (750 ppm, partsper million, μmole mole−1) methane is 0.1 and 0.5 ‰ for δ13C- and δD- CH4 at 10 min averaging time.Based on repeated measurements of compressed air during a 2-week intercomparison campaign, the repeatability of the TREX–QCLAS was determined to be 0.19 and 1.9‰ for δ13C and δD-CH4, respectively. In this intercomparison campaign the new in situ technique is compared to isotoperatio mass spectrometry (IRMS) based on glass flask and bag sampling and real time CH4 isotope analysis by two commercially available laser spectrometers. Both laserbased analyzers were limited to methane mole fraction and δ13C-CH4 analysis, and only one of them, a cavity ring down spectrometer, was capable to deliver meaningful data for the isotopic composition. After correcting for scale offsets, the average difference between TREX–QCLAS data and bag/flask sampling–IRMS values are within the extended WMO compatibility goals of 0.2 and 5‰ for δ13C- and δD-CH4, respectively. This also displays the potential to improve the interlaboratory compatibility based on the analysis of a reference air sample with accurately determined isotopic compsition.

AB - In situ and simultaneous measurement of the three most abundant isotopologues of methane using midinfrared laser absorption spectroscopy is demonstrated. A field-deployable, autonomous platform is realized by coupling a compact quantum cascade laser absorption spectrometer (QCLAS) to a preconcentration unit, called trace gas extractor (TREX). This unit enhances CH4 mole fractions by a factor of up to 500 above ambient levels and quantitatively separates interfering trace gases such as N2O and CO2. The analytical precision of the QCLAS isotope measurement on the preconcentrated (750 ppm, partsper million, μmole mole−1) methane is 0.1 and 0.5 ‰ for δ13C- and δD- CH4 at 10 min averaging time.Based on repeated measurements of compressed air during a 2-week intercomparison campaign, the repeatability of the TREX–QCLAS was determined to be 0.19 and 1.9‰ for δ13C and δD-CH4, respectively. In this intercomparison campaign the new in situ technique is compared to isotoperatio mass spectrometry (IRMS) based on glass flask and bag sampling and real time CH4 isotope analysis by two commercially available laser spectrometers. Both laserbased analyzers were limited to methane mole fraction and δ13C-CH4 analysis, and only one of them, a cavity ring down spectrometer, was capable to deliver meaningful data for the isotopic composition. After correcting for scale offsets, the average difference between TREX–QCLAS data and bag/flask sampling–IRMS values are within the extended WMO compatibility goals of 0.2 and 5‰ for δ13C- and δD-CH4, respectively. This also displays the potential to improve the interlaboratory compatibility based on the analysis of a reference air sample with accurately determined isotopic compsition.

U2 - 10.5194/amt-9-263-2016

DO - 10.5194/amt-9-263-2016

M3 - Article

VL - 9

SP - 263

EP - 280

JO - Atmospheric Measurement Techniques

JF - Atmospheric Measurement Techniques

SN - 1867-1381

IS - 1

ER -