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Applied Optics

Applied 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)

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The need for a continuous monitor for environmentally important pollutants at realistic [parts-per-trillion (parts in 1012)] 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

Original Manuscript: May 24, 2000
Revised Manuscript: September 6, 2000
Published: February 20, 2001

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)

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