| Zugriffsnummer | 54488 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Methane clumped isotopologue detection using cavity-ring-down spectroscopy. |
| Autor(in); Institution |
Fatima, Mehr; VTT Technical Research Center of Finland, Espoo, FINLAND
Ulvila, Ville; VTT Technical Research Center of Finland, Espoo, FINLAND
Prokhorov, Ivan; Empa, Laboratory for Air Pollution / Environmental Technology, Dübendorf, SWITZERLAND
Mohn, Joachim; Empa, Laboratory for Air Pollution / Environmental Technology, Dübendorf, SWITZERLAND
Li, Gang; 3.1, Allgemeine und Anorganische Chemie, PTB-Braunschweig
Hausmaninger, Thomas; VTT Technical Research Center of Finland, Espoo, FINLAND
|
| Quelle/Jahr | Proceedings of 8th International Conference on Optics, Photonics and Lasers:(2025), 56 - 58 |
| ISBN | 978-84-09-72042-2 |
| Verlag | Barcelona: IFSA Publishing, S. L. |
| Konferenzangaben | 8th International Conference on Optics, Photonics and Lasers (OPAL' 2025), Rhodes, 14-16, May, 2025, Greece |
| Freie Schlagworte | laser ; spectroscopy ; CRDS ; hitran ; clumped ; isotopologue ; methane |
| Zusammenfassung | Methane (CH4) is a potent greenhouse gas, making its source attribution critical for climate change mitigation. Traditional measurement techniques often struggle with mixed sources; however, clumped isotope analysis can achieve better source differentiation. In this work, detection of clumped methane isotopologues has been demonstrated using cavity-ringdown spectroscopy (CRDS). The technique employs a tunable quantum cascade laser coupled into a highly reflective optical cavity. The ring-down time differences are then measured to determine abundances of isotopologues. Measurements were performed using industrial-grade methane, focusing on the spectral region from 2228.4 to 2229.2 cm-1. The recorded spectra demonstrate CRDS as an effective method for measuring clumped methane isotopologues, addressing absorption lines assigned in the recently published FTIR spectra [1]. [1] N. Zhang, I. Prokhorov, N. Kueter, G. Li, et al., Rapid high-sensitivity analysis of methane clumped isotopes (Δ13CH3D and Δ12CH2D2) using mid-infrared laser spectroscopy, Analytical Chemistry, Vol. 96, Issue 2, 2024, pp. 1291–1299. |
| Themenbereich der Metrologie | Metrologie in der Chemie und Stoffeigenschaften |
Zitierung
Fatima, M., Ulvila, V., Prokhorov, I., Mohn, J., Li, G., & Hausmaninger, T. (2025). Methane clumped isotopologue detection using cavity-ring-down spectroscopy. 8th International Conference on Optics, Photonics and Lasers (OPAL' 2025), Rhodes, 14-16, May, 2025, Greece.