Micellar enhanced photo-induced fluorescence and absorbance for the development of an on-site early warning water quality monitoring system for pesticides
| Autor: | Pape Abdoulaye Diaw, Lamine Cisse, Diène Diégane Thiaré, Ndeye A. Diop, Jean-Pierre Bakhoum, Philippe Giamarchi, Mame Diabou Gaye-Seye, Bernard Le Jeune, O.M.A. Mbaye, El. Hadji Tombé Bodian, Atanasse Coly |
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| Přispěvatelé: | Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Laboratoire d'Optique et de Magnétisme (OPTIMAG), Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), Université Alioune Diop de Bambey (UADB), Laboratoire Géomatériaux et Environnement (LGE), Université Paris-Est Marne-la-Vallée (UPEM), Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Resolution (mass spectrometry) Calibration curve 010501 environmental sciences 01 natural sciences Biochemistry Analytical Chemistry law.invention Absorbance law [CHIM.ANAL]Chemical Sciences/Analytical chemistry Water Quality Electrochemistry Environmental Chemistry Pesticides Spectroscopy Micelles 0105 earth and related environmental sciences Detection limit Aqueous solution Chromatography Spectrometer 010401 analytical chemistry Water Fluorescence 6. Clean water 0104 chemical sciences Spectrometry Fluorescence 13. Climate action Light-emitting diode |
| Zdroj: | Analyst Analyst, Royal Society of Chemistry, 2021, 146 (14), pp.4515-4524. ⟨10.1039/D1AN00300C⟩ |
| ISSN: | 0003-2654 1364-5528 |
| Popis: | International audience; This paper describes two prototypes of an on-site Early Warning Water Quality Monitoring System (EWWQMS) for pesticide quantification in natural waters. As many pesticides are non-fluorescent, the EWWQMS setup uses UV photoconversion to form highly fluorescent photoproducts. To enhance sensitivity, the two prototypes use micellar-enhanced fluorescence with surfactant (cetyl trimethyl ammonium chloride) in aqueous solution. To improve specificity, four UV LEDs at different wavelengths then excite the fluorescent photoproducts. The EWWQMS prototypes also employ UV absorption for quantification of non-photosensitive pesticides. The first prototype detects the pesticides via a diode array spectrometer. The second system is developed with higher resolution spectrometer and an intensified CCD camera detection to improve the sensitivity of the method. These experimental set-ups are described, explained and tested. Analytical applications were carried out online in CTAC aqueous solution, for the determination of isoproturon, flufenoxuron and profenofos. The calibration curves obtained are linear over one order of magnitude, and the detection limits are in the ng mL−1 range. The analytical performances of these new methods are good compared with other published classical micellar enhanced photo-induced fluorescence methods for the determination of pesticides in aqueous solutions. Our results show that these EWWQMS prototypes can be used as a warning system to protect against pesticide contamination exceeding the threshold of treatment capabilities at industrial facilities using natural waters. |
| Databáze: | OpenAIRE |
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