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URL: http://opus.kobv.de/ubp/volltexte/2006/1016/
Hörner, Gerald ; Lau, Steffen ; Kantor, Zoltan ; Löhmannsröben, Hans-Gerd
Isotope selective analysis of CO2 with tunable diode laser (TDL) spectroscopy in the NIR
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Kurzfassung auf Englisch
The performance of a home-built tunable diode laser (TDL) spectrometer, aimed at multi-line detection of carbon dioxide, has been evaluated and optimized. In the regime of the (3001)III / (000) band of 12CO2 around 1.6 μm, the dominating isotope species 12CO2, 13CO2, and 12C18O16O were detected simultaneously without interference by water vapor. Detection limits in the range of few ppmv were obtained for each species utilizing wavelength modulation (WM) spectroscopy with balanced detection in a long-path absorption cell set-up. High sensitivity in conjunction with high precision —typically ±1‰ and ±6‰ for 3% and 0.7% of CO2, respectively— renders this experimental approach a promising analytical concept for isotope-ratio determination of carbon dioxide in soil and breath gas. For a moderate 12CO2 line, the pressure dependence of the line profile was characterized in detail, to account for pressure effects on sensitive measurements.
| SWD-Schlagwörter: | Isotopenverhältnis , Kohlendioxid | |
| Freie Schlagwörter (deutsch): | Diodenlaserspektroskopie | |
| Freie Schlagwörter (englisch): | Isotope ratio , carbon monoxide , diode laser spectroscopy | |
| RVK - Regensburger Verbundklassifikation | VE 9908 | |
| Collection | Universität Potsdam / Aufsätze (Pre- und Postprints) / Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie / Physikalische Chemie | |
| Institut: | Institut für Chemie | |
| DDC-Sachgruppe: | Chemie | |
| Dokumentart: | c Postprint | |
| Schriftenreihe: | Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372 | |
| Band Nummer: | paper 020 | |
| Quelle: | Hörner et al. Analyst Vol.129, No. 8; 772-778 (2004) | |
| Sprache: | Englisch | |
| Erstellungsjahr: | 2004 | |
| Publikationsdatum: | 01.11.2006 | |
| Bemerkung: |
This paper was published in: The Analyst, 129 (2004), pp. 772-778 ISSN: 0003-2654 DOI:10.1117/10.1039/b404552c Reproduced by permission of The Royal Society of Chemistry. This document may not be further made available or distributed. |
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