REMPI detection of volatile aromatic hydrocarbons in ambient air

Orven F. Swenson; Gregory D. Gillispie

doi:10.1117/12.259767

26 November 1996 REMPI detection of volatile aromatic hydrocarbons in ambient air

Orven F. Swenson, Gregory D. Gillispie

Proceedings Volume 2835, Advanced Technologies for Environmental Monitoring and Remediation; (1996) https://doi.org/10.1117/12.259767
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Volatile aromatic hydrocarbons such as benzene, toluene, ethylbenzene, and xylenes (BTEX), and styrene, aniline, and phenol can be directly and sensitively detected in ambient air by resonance-enhanced multiphoton ionization (REMPI) spectroscopy. The REMPI spectra closely resemble conventional absorbance spectra, but the REMPI technique is far more sensitive. Detection limits for directly focused tunable laser light into the ionization cell are less than 10 ppbv for BTEX and less than 1 ppbv for styrene, aniline, and phenol. Benzene in aqueous solution was remotely detected down to concentrations at the (mu) g/L level by a headspace analysis in which light was delivered to the ionization cell over a 20-meter long optical fiber.

Citation Download Citation

Orven F. Swenson and Gregory D. Gillispie "REMPI detection of volatile aromatic hydrocarbons in ambient air", Proc. SPIE 2835, Advanced Technologies for Environmental Monitoring and Remediation, (26 November 1996); https://doi.org/10.1117/12.259767

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