On-line detection of aromatic molecules in air

Israel Schechter*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Aromatic molecules are detected in ambient air by a method that provides on-line results. The method is based on sensitive multiphoton ionization (MPI) of these molecules by UV laser pulses. Ions are identified and quantified by their induced electrostatic mirror image during their flight toward a collecting electrode. Only moderate vacuum is needed and quantification is straightforward. The expected performance of the new detection principle is analyzed by computer simulations, and then tested for some aromatic compounds in ambient air (ppm to ppb range). The method has the potential of simultaneous multicompounds analysis, however, it has only been tested for simple mixtures. The very simple experimental setup that is used, is compensated by a comprehensive set of chemometric algorithms. These algorithms are needed for identification of aromatic ions and for resolution of mixtures.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 10 Feb 1995
Externally publishedYes
EventOptical Instrumentation for Gas Emissions Monitoring and Atmospheric Measurements 1994 - McLean, United States
Duration: 6 Nov 199410 Nov 1994


  • Air
  • Analysis
  • Aromatic
  • Benzene
  • Detector
  • Ionization
  • Laser
  • On-line


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