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Analyze of Oxadiazon Herbicide in Natural Waters by Micellar-Enhanced Photo-Induced Fluorescence.

A micellar-enhanced photo-induced fluorescence (ME-PIF) method was developed to analyze, for the first time, oxadiazole herbicide (namely oxadiazon) in natural water samples. Photo-conversion under UV irradiation of the herbicide into strongly fluorescent photoproducts was performed in aqueous solution and in the presence of two surfactants, cetyltrimethylammonium chloride (CTAC) or Tween 20, at micellar concentrations. The ME-PIF parameters were optimized. The ME-PIF method gave very good results with satisfactory analytical performance for the determination of a selected pesticide with concentration linear dynamic ranges of over one to two orders of magnitude. It yielded good reproducibility (RSD values of between 3.6 and 9.6%) in tap, river and sea water spiked samples, and the limits of detection were in the ng mL?1 range.

Auteur(s) : Jean-Pierre Bakhoum, Olivier MA Mbaye, Pape A. Diaw, Lamine Cissé, Moussa Mbaye, Mame D. Gaye-Seye, Atanasse Coly, Bernard Le Jeune, Philippe Giamarch
Pages : 447-452
Année de publication : 2020
Revue : Analytical Sciences
N° de volume : 36(4)
Type : Article
Mise en ligne par : COLY Atanasse