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Alternative to High Pressure Mercury Vapor Lamp for Photo Induced Fluorescence Analytical Methods; Application to the Determination of Pesticides in Water

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Abstract

The photo-induced fluorescence method is often applied to determine non-native fluorescent compounds. It typically uses UV irradiation from a high pressure mercury vapor discharge lamp to create photo-induced fluorescent compounds, which are then quantified by fluorescence spectroscopy. However, these mercury lamps require a high-voltage power supply and may accidentally induce electric shocks and the release of mercury vapors. As an alternative, we have evaluated in this technical note new UV-C germicidal lamps. These lamps exhibit a higher power at 254 nm and allowed us to obtain a far greater amount of photo-induced compounds in a shorter time. For the first time, this new irradiation system has been applied for the determination of pesticides in water and has shown a significant increase in the method sensitivity. These good results allowed us to conclude that the new UV-C lamps are a relevant alternative to high pressure mercury vapor discharge lamps for use with photo induced fluorescent methods.

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Acknowledgements

J.-P. B. thanks the Service of Cooperation and Cultural Action (SAC) of the French Embassy in Dakar (Senegal) for a French Cooperation PhD grant in support of this work.

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Authors and Affiliations

  1. Lab. Matériaux, Electrochimie et Photochimie Analytique, Univ. A. Diop, Bambey, Senegal

    Ndeye A. Diop & Pape A. Diaw

  2. OPTIMAG Lab., Brest Univ., 6 Av. Victor Le Gorgeu, 29285 Brest, Cedex, France

    Jean-Pierre Bakhoum, Gaël Le Roux, Bernard Le Jeune & Philippe Giamarchi

  3. Lab. Photochimie et d’Analyse, Univ. C. A. Diop, Dakar, Senegal

    Olivier M. A. Mbaye & Lamine Cisse

  4. Lab. Géomatériaux et Environnement, Univ. Paris-Est, 77454, Marne-la-Vallée, France

    Mame D. Gaye-Seye

Authors
  1. Ndeye A. Diop
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  2. Jean-Pierre Bakhoum
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  3. Pape A. Diaw
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  4. Olivier M. A. Mbaye
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  5. Lamine Cisse
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  6. Mame D. Gaye-Seye
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  7. Gaël Le Roux
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  8. Bernard Le Jeune
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  9. Philippe Giamarchi
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Correspondence to Philippe Giamarchi.

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Diop, N.A., Bakhoum, JP., Diaw, P.A. et al. Alternative to High Pressure Mercury Vapor Lamp for Photo Induced Fluorescence Analytical Methods; Application to the Determination of Pesticides in Water. ANAL. SCI. 37, 1177–1180 (2021). https://doi.org/10.2116/analsci.20N037

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  • DOI: https://doi.org/10.2116/analsci.20N037

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