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Isotopic resolution of carbon monoxide and carbon dioxide by NIR diode laser spectroscopy

  • Near-infrared (NIR) absorption spectroscopy with tunable diode lasers allows the simultaneous detection of the three most important isotopologues of carbon dioxide (<SUP>12</SUP>CO<SUB>2</SUB>, <SUP>13</SUP>CO<SUB>2</SUB>, <SUP>12</SUP>C<SUP>18</SUP>O<SUP>16</SUP>O) and carbon monoxide (<SUP>12</SUP>CO, <SUP>13</SUP>CO, <SUP>12</SUP>C<SUP>18</SUP>O). The flexible and compact fiber-optic tunable diode laser absorption spectrometer (TDLAS) allows selective measurements of CO<SUB>2</SUB> 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.

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Author:Steffen Lau, Katharina Salffner, Hans-Gerd LöhmannsröbenORCiDGND
Series (Serial Number):Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (paper 017)
Document Type:Postprint
Year of Completion:2006
Publishing Institution:Universität Potsdam
Release Date:2006/11/01
carbon dioxide; carbon monoxide; diode laser spectroscopy; isotope
GND Keyword:Isotop; Kohlenmonoxid; Kohlendioxid
Source:Proc. SPIE Vol. 6189 (2006), 618924, pp. 538-543
RVK - Regensburg Classification:VE 9908
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Notes extern:
© 2006 Society of Photo-Optical Instrumentation Engineers

This paper was published in:
Optical Sensing II / Brian Culshaw, Anna G. Mignani, Hartmut Bartelt, Leszek R. Jaroszewicz (eds.), Proceedings of SPIE Vol. 6189 (2006), pp. 538-543
ISBN: 0-8194-6245-4

It is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purpose, or modification of the content of the paper are prohibited.