Abstract
The architecture and operation of a trace hydrogen cyanide (HCN) gas sensor based on quartz-enhanced photoacoustic spectroscopy and using a λ=1.53 μm telecommunication diode laser are described. The influence of humidity content in the analyzed gas on the sensor performance is investigated. A kinetic model describing the vibrational to translational (V–T) energy transfer following the laser excitation of a HCN molecule is developed. Based on this model and the experimental data, the V–T relaxation time of HCN was found to be (1.91±0.07)10-3 s Torr in collisions with N2 molecules and (2.1±0.2)10-6 s Torr in collisions with H2O molecules. The noise-equivalent concentration of HCN in air at normal indoor conditions was determined to be at the 155-ppbv level with a 1-s sensor time constant.
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References
http://www.osha.gov/SLTC/healthguidelines/hydrogencyanide/recognition.html
A.A. Kosterev, F.K. Tittel, D. Serebryakov, A. Malinovsky, I. Morozov, Rev. Sci. Instrum. 76, 043105 (2005)
T. Shimanouchi, Tables of Molecular Vibrational Frequencies, consolidated Vol. I, Natl. Bur. Stand. (U.S.) National Standards References Data Series No. 39 (U.S. GPO, Washington, 1972)
F.G.C. Bijnen, F.J.M. Harren, J.H.P. Hackstein, J. Reuss, Appl. Opt. 35, 5357 (1996)
S. Schilt, J.-P. Besson, L. Thévenaz, Appl. Phys. B 82, 319 (2006)
G. Gorelik, Dokl. Akad. Nauk SSSR 54, 779 (1946)
T.L. Cottrell, J.C. McCoubrey, Molecular Energy Transfer in Gases (Butterworths, London, 1961)
P.W. Hastings, M.K. Osborn, C.M. Sadowski, I.W. Smith, J. Chem. Phys. 78, 3893 (1983)
T.L. Chow, Classical Mechanics (Wiley, New York Chichester Brisbane Toronto Singapore, 1995)
H.F. Olson, Elements of Acoustical Engineering (Van Nostrand, New York, 1947)
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82.80.Kq; 42.62.Fi
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Kosterev, A., Mosely, T. & Tittel, F. Impact of humidity on quartz-enhanced photoacoustic spectroscopy based detection of HCN. Appl. Phys. B 85, 295–300 (2006). https://doi.org/10.1007/s00340-006-2355-2
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DOI: https://doi.org/10.1007/s00340-006-2355-2