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Development of online automatic detector of hydrocarbons and suspended organic matter by simultaneously acquisition of fluorescence and scattering

Permanent online monitoring of water supply pollution by hydrocarbons is needed for various industrial plants, to serve as an alertwhen thresholds are exceeded. Fluorescence spectroscopy is a suitable technique for this purpose due to its sensitivity andmoderate cost. However, fluorescencemeasurements can be disturbed by the presence of suspended organic matter,which induces beam scattering and absorption, leading to an underestimation of hydrocarbon content. To overcomethis problem,we propose an original technique of fluorescence spectra correction, based on a measure of the excitation beamscattering caused by suspended organic matter on the left side of the Rayleigh scattering spectral line. This correction allowed us to obtain a statistically validated estimate of the naphthalene content (used as representative of the polyaromatic hydrocarbon contamination), regardless of the amount of suspended organic matter in the sample.Moreover, it thus becomes possible, based on this correction, to estimate the amount of suspended organic matter. By this approach, the online warning system remains operational even when suspended organic matter is present in the water supply.

Auteur(s) : Moussa Mbaye, Pape Abdoulaye Diaw, Diabou Gaye-Saye, Bernard Le Jeune, Goulven Cavalin, Lydie Denis, Jean-Jacques Aaron, Roger Delmas, Philippe Giamar
Année de publication : 2018
Revue : Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Type : Article
Mise en ligne par : MBAYE Moussa