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Applied Physics B

, Volume 85, Issue 2–3, pp 295–300 | Cite as

Impact of humidity on quartz-enhanced photoacoustic spectroscopy based detection of HCN

  • A.A. KosterevEmail author
  • T.S. Mosely
  • F.K. Tittel
Article

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.

Keywords

Tuning Fork Control Electronic Unit Photoacoustic Signal Hydrogen Cyanide Quartz Tuning Fork 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    http://www.osha.gov/SLTC/healthguidelines/hydrogencyanide/recognition.htmlGoogle Scholar
  2. 2.
    A.A. Kosterev, F.K. Tittel, D. Serebryakov, A. Malinovsky, I. Morozov, Rev. Sci. Instrum. 76, 043105 (2005)CrossRefADSGoogle Scholar
  3. 3.
    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)Google Scholar
  4. 4.
    F.G.C. Bijnen, F.J.M. Harren, J.H.P. Hackstein, J. Reuss, Appl. Opt. 35, 5357 (1996)ADSCrossRefGoogle Scholar
  5. 5.
    S. Schilt, J.-P. Besson, L. Thévenaz, Appl. Phys. B 82, 319 (2006)CrossRefADSGoogle Scholar
  6. 6.
    G. Gorelik, Dokl. Akad. Nauk SSSR 54, 779 (1946)Google Scholar
  7. 7.
    T.L. Cottrell, J.C. McCoubrey, Molecular Energy Transfer in Gases (Butterworths, London, 1961)Google Scholar
  8. 8.
    P.W. Hastings, M.K. Osborn, C.M. Sadowski, I.W. Smith, J. Chem. Phys. 78, 3893 (1983)CrossRefADSGoogle Scholar
  9. 9.
    T.L. Chow, Classical Mechanics (Wiley, New York Chichester Brisbane Toronto Singapore, 1995)Google Scholar
  10. 10.
    H.F. Olson, Elements of Acoustical Engineering (Van Nostrand, New York, 1947)Google Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringRice UniversityHoustonUSA

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