NO and PO photofragments as trace analyte indicators of nitrocompounds and organophosphonates |
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| Authors: | J Shu I Bar S Rosenwaks |
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| Institution: | (1) Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel, IL;(2) The Institute for Chemistry & Chemical Technology, The Institutes for Applied Research, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel, IL |
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| Abstract: | Laser photolysis that releases characteristic photofragments, combined with laser-induced fluorescence (LIF) that subsequently
monitors them, facilitate detection of trace-vapor analytes in air. The feasibility of the technique is demonstrated for nitrocompounds
and organophosphonates detection. Using one-color and two-color lasers, respectively, the representative NO and PO photofragments
were tagged. Employment of longer wavelengths for photodissociation, and where possible also for LIF, than for fluorescence
collection, obstructs background fluorescence and in the former compounds also prevents interference of ambient ground state
NO.
Received: 1 February 2000 / Revised version: 27 April 2000 / Published online: 20 September 2000 |
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| Keywords: | PACS: 82 50Fv 82 80Ch |
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