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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 6 — Feb. 20, 2001
  • pp: 859–865

Development of a Jet-REMPI (Resonantly Enhanced Multiphoton Ionization) Continuous Monitor for Environmental Applications

Harald Oser, Michael J. Coggiola, Gregory W. Faris, Steve E. Young, Bengt Volquardsen, and David R. Crosley  »View Author Affiliations


Applied Optics, Vol. 40, Issue 6, pp. 859-865 (2001)
http://dx.doi.org/10.1364/AO.40.000859


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Abstract

The need for a continuous monitor for environmentally important pollutants at realistic [parts-per-trillion (parts in 10<sup>12</sup>)] concentrations measured in real time (minutes) is widely recognized. We developed an instrument that is based on supersonic-jet expansion and cooling, followed by resonantly enhanced multiphoton ionization (REMPI) into a mass spectrometer. This approach furnishes the dual selectivity of narrow-band tuned laser absorption and mass analysis. We initiated a spectroscopic characterization of the jet’s collisional cooling behavior to optimize the instrument’s sensitivity and selectivity, made measurements of several aromatic compounds (including polychlorinated dioxins) by use of a one-color REMPI scheme, and demonstrated a two-color excitation scheme.

© 2001 Optical Society of America

OCIS Codes
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics

Citation
Harald Oser, Michael J. Coggiola, Gregory W. Faris, Steve E. Young, Bengt Volquardsen, and David R. Crosley, "Development of a Jet-REMPI (Resonantly Enhanced Multiphoton Ionization) Continuous Monitor for Environmental Applications," Appl. Opt. 40, 859-865 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-6-859


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References

  1. H. Oser, K. Copic, M. J. Coggiola, G. W. Faris, and D. R. Crosley, “Congener-specific detection of dioxins using jet-REMPI,” Chemosphere (to be published).
  2. H. Oser, R. Thanner, and H. H. Grotheer, “Jet-REMPI for the detection of trace gas compounds in complex gas mixtures, a tool for kinetic research and incinerator process control,” Combust. Sci. Technol. 116, 567–572 (1996).
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  7. E. B. Wilson, Jr., “Statistical weights of the rotational levels of polyatomic molecules, including methane, ammonia, benzene, cyclopropane, and ethylene,” J. Chem. Phys. 3, 276–285 (1935).
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  9. C. Weickhardt, R. Zimmermann, K.-W. Schramm, D. Lenoir, U. Boesl, and E. W. Schlag, “Laser mass spectrometry of dibenzodioxin, dibenzofuran, and two isomers of dichlorodibenzodioxins: selective ionization,” Rapid Commun. Mass. Spectrom. 7, 183–187 (1993).

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