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Proceedings Paper

Isotopic resolution of carbon monoxide and carbon dioxide by NIR diode laser spectroscopy
Author(s): Steffen Lau; Katharina Salffner; Hans-Gerd Löhmannsröben
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Paper Abstract

Near-infrared (NIR) absorption spectroscopy with tunable diode lasers allows the simultaneous detection of the three most important isotopologues of carbon dioxide (12CO2, 13CO2, 12C18O16O) and carbon monoxide (12CO,13CO, 12C18O). The flexible and compact fiber-optic tunable diode laser absorption spectrometer (TDLAS) allows selective measurements of CO2 and CO with high isotopic resolution without sample preparation since there is no interference with water vapour. For each species, linear calibration plots with a dynamic range of four orders of magnitude and detection limits (LOD) in the range of a few ppm were obtained utilizing wavelength modulation spectroscopy (WMS) with balanced detection in a Herriott-type multipass cell. The high performance of the apparatus is illustrated by fill-evacuation- refill cycles.

Paper Details

Date Published: 25 April 2006
PDF: 6 pages
Proc. SPIE 6189, Optical Sensing II, 618924 (25 April 2006); doi: 10.1117/12.662765
Show Author Affiliations
Steffen Lau, Univ. Potsdam (Germany)
Katharina Salffner, Univ. Potsdam (Germany)
Hans-Gerd Löhmannsröben, Univ. Potsdam (Germany)


Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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