Abstract
Spectra measurements around 1.65 μm have revealed that spectral lines of ethylene are present in this range along with methane spectral lines. Furthermore, the HITRAN database has no parameters of these ethylene lines. In particular, it was found that several ethylene absorption lines are located near the methane feature often used for quantitative spectroscopy (R3 triplet of the 2ν3 band). Ethylene can be present together with methane in the samples under study, perturbing the recorded spectrum of CH4. This perturbation by an interfering species can produce systematic errors in the derived CH4 concentration.
We have found in this work by numerical modelling that when measuring the methane concentration by a diode laser methane sensor operating in the 6046–6048 cm-1 range, the systematic error on the retrieved CH4 concentration decreases, as a rule, when decreasing the width of the fitted spectral window. At equal concentrations of ethylene and methane in the sample under study, the error on the concentration of CH4 determined by the correlation technique can reach 15%. When using the technique based on the 2nd or 3rd derivative of the spectrum, interfering or impurity lines induce a systematic error on the derived CH4 concentration, which is less than 2%.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
N.M. Bazhin, Khim. Interesakh Ustoichivogo Razvitiya 1, 381 (1993)
http://gaw.kishou.go.jp/wdcgg/product
Methane detector. Technical Specification (Institute of General Physics RAS, Moscow, 1999)
A. Nadezhdinskii, A. Berezin, S. Chernin, O. Ershov, V. Kutnyak, Spectrochim. Acta A 55, 2083 (1999)
A.G. Berezin, O.V. Ershov, A.I. Nadezhdinskii, Y.P. Shapovalov, in Abstracts of Reports at XIV Symposium on High Resolution Molecular Spectroscopy (IAO SB RAS, Tomsk, 2003), p. 107
A.V. Gladyshev, M.I. Belovolov, S.A. Vasiliev, E.M. Dianov, O.I. Medvedkov, A.I. Nadezhdinskii, O.V. Ershov, A.G. Beresin, V.P. Duraev, E.T. Nedelin, Spectrochim. Acta A 60, 3337 (2004)
A. Boschetti, D. Bassi, E. Iacob, S. Iannotta, L. Ricci, M. Scotoni, Appl. Phys. B 74, 273 (2002)
J.-P. Besson, S. Schilt, L. Thevenaz, Spectrochim. Acta A 60, 3449 (2004)
V. Zeninari, B. Parvitte, D. Courtois, V.A. Kapitanov, Y.N. Ponomarev, Infrared Phys. Technol. 44, 253 (2003)
A. Grossel, V. Zeninari, L. Joly, B. Parvitte, D. Courtois, G. Durry, Spectrochim. Acta A 63, 1021 (2006)
B.L. Fawcett, A.M. Parkes, D.E. Shallcross, A.J. Orr-Ewing, Phys. Chem. Chem. Phys. 4, 5960 (2002)
C. Fischer, M. Sigrist, in Conference on Lasers and Electro-Optics, CLEO’03 (Baltimore, 2003), p. 472
A.K.Y. Ngai, S.T. Persijn, G. Von Basum, F.J.M. Harren, Appl. Phys. B 85, 173 (2006)
M. Triki, M. Chenevier, N. Sadeghi, D. Romanini, Abstracts of Papers on 6th International Conference on Tunable Diode Laser Spectroscopy (Shampagne-Ardenne Universite, Reims, 2007), p. 55
V.A. Kapitanov, Y.N. Ponomarev, I.S. Tyryshkin, Abstract of Reports at XV Symposium on High Resolution Molecular Spectroscopy (IAO SB RAS, Tomsk, 2006), p. 114
V.A. Kapitanov, I.S. Tyryshkin, N.P. Krivolutskii, Y.N. Ponomarev, M. De Batist, R.Y. Gnatovsky, Spectrochim. Acta A 66, 788 (2007)
V.A. Kapitanov, Y.N. Ponomarev, Atmos. Oceanic Opt. 19, 354 (2006)
B.G. Ageev, V.A. Kapitanov, Y.N. Ponomarev, V.A. Sapozhnikova, Atmos. Oceanic Opt. 20, 726 (2007)
W.C. Kuster, F.J.M. Harren, J. de Gouw, Environ. Sci. Technol. 39, 4581 (2005)
Assessment Report on Ethylene for Developing Ambient Air Quality Objectives (Alberta Environment 2003)
A.M. Parkes, R.E. Lindley, A.J. Orr-Ewing, Phys. Chem. Chem. Phys. 6, 5313 (2004)
V.A. Kapitanov, Y.N. Ponomarev, I.S. Tyryshkin, A.P. Rostov, Spectrochim. Acta A 66, 811 (2007)
Author information
Authors and Affiliations
Corresponding author
Additional information
PACS
07.07.Df; 07.88.+y; 42.62.-b
Rights and permissions
About this article
Cite this article
Nikiforova, O., Kapitanov, V. & Ponomarev, Y. Influence of ethylene spectral lines on methane concentration measurements with a diode laser methane sensor in the 1.65 μm region. Appl. Phys. B 90, 263–268 (2008). https://doi.org/10.1007/s00340-007-2919-9
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00340-007-2919-9