Estimation of the limiting sensitivity of laser fragmentation/laser-induced fluorescence technique for detection of nitrocompound vapors in atmosphere S. M. Bobrovnikov, E. V. Gorlov, V. I. Zharkov
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ArticleContent type: Текст Media type: электронный Subject(s): лазерная фрагментация | нитросоединения | нитробензол | нитротолуолы | лазерно-индуцированная флуоресценция | оксид азотаGenre/Form: статьи в журналах Online resources: Click here to access online
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Atmospheric and oceanic optics Vol. 36, № 1. P. 70-77Abstract: The limiting sensitivity of a technique for detecting vapors of nitrocompounds in the atmosphere based on laser fragmentation/laser-induced fluorescence is estimated in calculations with the developed kinetic model of the LF/LIF process. The calculations take into account the influence of atmospheric nitrogen dioxide as a limiting factor of the sensitivity of the technique in a real atmosphere. It is shown that if the concentration of nitrogen dioxide in the atmosphere does not exceed 10 ppb, the minimum detectable concentrations of nitrobenzene and o-nitrotoluene vapors are the ppb-level. It is also shown that the one-color excitation technique usually used for the detection of nitrocompounds does not allow attaining the maximal LF/LIF efficiency.
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The limiting sensitivity of a technique for detecting vapors of nitrocompounds in the atmosphere based on laser fragmentation/laser-induced fluorescence is estimated in calculations with the developed kinetic model of the LF/LIF process. The calculations take into account the influence of atmospheric nitrogen dioxide as a limiting factor of the sensitivity of the technique in a real atmosphere. It is shown that if the concentration of nitrogen dioxide in the atmosphere does not exceed 10 ppb, the minimum detectable concentrations of nitrobenzene and o-nitrotoluene vapors are the ppb-level. It is also shown that the one-color excitation technique usually used for the detection of nitrocompounds does not allow attaining the maximal LF/LIF efficiency.
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