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Photochemically-Induced Fluorescence Dosage of Non-Fluorescent Pyrethroid (Etofenprox) in Natural Water Using a Cationic Micellar Medium

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Abstract

An analytical method based on the use of UV-irradiation to produce fluorescent derivatives from Etofenprox a non-fluorescent pyrethroid insecticide is described. The impact of cetyltrimethylammonium chloride (CTAC) micellar medium on the Etofenprox photochemically-induced fluorescence (PIF) is reported. Parameters influencing the sensitivity and repeatability of the PIF method have been optimized. The alkaline medium (NaOH 6 × 10−2 M) + CTAC surfactant molecules (3.84 mg/ml) in acetonitrile is found to be very suitable for this pyrethroid insecticide analysis in environment matrices. Linear dynamic range is established over more than two orders of magnitude. The limit of detection is lower than 5 ng/ml. The method seems to be suitable for environmental matrices quality control. Application to the analysis of spiked natural waters gave recoveries rate ranged from 94 to 104% and 107 to 115% respectively for river and pound water.

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Aknowledgements

This work was financed by Université Abdou Moumouni (Niamey-Niger) within the UAM 2008-2010 research grant. We are grateful to the Laboratoire de Photochimie et d’Analyse (LPA-FST/UCAD, Dakar Senegal) for the technical and logistical support during this study.

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Authors and Affiliations

  1. Département de Chimie, Faculté des Sciences, Université Abdou Moumouni, BP 10662, Niamey, Niger

    Rabani Adamou, Alassane Abdoulaye, Maimouna Soumaila, Idrissa Moussa & Khalid Ikhiri

  2. Faculté des Sciences et Techniques (FST), Université Cheikh Anta Diop (UCAD), BP 5005, Dakar, Sénégal

    Atanasse Coly & Alphonse Tine

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  1. Rabani Adamou
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  2. Atanasse Coly
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  3. Alassane Abdoulaye
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  4. Maimouna Soumaila
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  7. Alphonse Tine
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Correspondence to Rabani Adamou.

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Adamou, R., Coly, A., Abdoulaye, A. et al. Photochemically-Induced Fluorescence Dosage of Non-Fluorescent Pyrethroid (Etofenprox) in Natural Water Using a Cationic Micellar Medium. J Fluoresc 21, 1409–1415 (2011). https://doi.org/10.1007/s10895-010-0824-9

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