Micellar fluorescence enhancement of carbamate pesticides

Guárdia, Miguel de la; Hernández, MarcoRoberto; Sancenón, S.; Carrión, J. L.

doi:10.1016/0166-6622(90)80218-s

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…In solutions strongly basic (pH ≥ 12) Carbaryl is hydrolyzed very quickly to 1‐naphtholate . However, in our condition (pH=8.7) Carbaryl does not hydrolyze since we do not observe changes in the absorption spectra during 3 hours (Figure S1 in supplementary information).…”

Section: Introductionmentioning

confidence: 97%

Supramolecular Systems as an Alternative for Enzymatic Degradation of 1‐Naphthyl Methylcarbamate (Carbaryl) Pesticide

et al. 2019

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Reverse micelles (RMs) are considered as versatile nanoreactors because they can create a unique microenvironment, to carry out biochemical and chemical reactions of interest. Thus, in this contribution we propose them to be used as a new approach to hydrolyze a powerful and widely used pesticide: 1‐naphthyl methylcarbamate (Carbaryl), using the enzyme α‐Chymotrypsin (α‐CT) encapsulated in the water pool.

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Section: Introductionmentioning

confidence: 97%

Supramolecular Systems as an Alternative for Enzymatic Degradation of 1‐Naphthyl Methylcarbamate (Carbaryl) Pesticide

et al. 2019

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“…However, in most cases, the application of such media in spectrofluorimetry involves organic aromatic compounds other than pesticides [55,59,61].…”

Section: Fluorimetric Detection In Stationary Mediamentioning

confidence: 99%

“…The use of organized media viz., cyclodextrins [56], micelles [57] and liposomic vesicles [58] for resolution of mixtures of analytes [55], enhancement of fluorescence detection [59] and reduction of interferences from impurities [60] has developed rapidly. However, in most cases, the application of such media in spectrofluorimetry involves organic aromatic compounds other than pesticides [55,59,61].…”

Section: Fluorimetric Detection In Stationary Mediamentioning

confidence: 99%

Luminescence methods in pesticide analysis. Applications to the environment

Aaron¹,

Coly²

2000

Analusis

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DossierLuminescence spectroscopy such as the need for pretreatment procedures in the case of weakly volatile and/or thermally labile pesticides (e.g., carbamates, phenylureas and sulfonylureas). The second most utilized method is HPLC, with UV-visible absorption detectors; it remains the technique of choice for screening work.The use of luminescence techniques (especially fluorescence) for organic pesticide residue analysis has been limited by the fact that, relatively few of these compounds are strongly luminescent. However, many compounds do possess the necessary degree of aromaticity and may be converted into luminescent species using a variety of methods. Hence, two distinct cases have to be considered. (i) If the pesticide under study is luminescent, then it can be determined directly; (ii) if the pesticide is non or weakly luminescent, it can be converted into a luminescent compound using various physicochemical means, including chemical and/or photochemical reactions.Derivatization reactions constitute an important aspect of pesticide luminescence analysis since many pesticides have one or more functional groups and can be converted into more stable derivatives to successfully ensure environmental analysis. The number of papers, especially reviews [8][9][10][11][12][13] and books [14][15][16][17], in which this subject is discussed, demonstrates this increase of the derivatization use.In this review, the most important publications concerning significant advances in the luminescence methodology, instrumentation and applications to environmental analysis of pesticides will be reported. We will describe the recent available literature on direct and indirect fluorimetric methods, photochemically-induced fluorescence, photosensitized fluorescence and phosphorimetric methods used for pesticide analysis. As it will be shown, recent instrumentation, including sophisticated electronics and precise optical systems, makes luminescence a highly sensitive and selective tool for pesticide residue detection. Fluorimetric methodsAn early work on the fluorescence of pesticides has been performed in stationary solutions, (i.e., batch procedure) by

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“…In spite of their great analytical interest, micellar media have been seldom applied to the fluorescence or PIF analysis of pesticides [20][21][22]. Recently, we have proposed the use of aqueous micellar solutions to enhance the PIF signal and improve the detection of fenvalerate and deltamethrin [21] and some sulfonylurea herbicides [22].…”

Section: Introductionmentioning

confidence: 99%

Usefulness of micellar media for the quantitative analysis of phenylurea herbicides in water by photochemically-induced fluorescence

et al. 1999

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Abstract. UV irradiation of four non-fluorescent phenylurea herbicides including linuron, diuron, isoproturon and neburon is shown to yield fluorescent photoproducts. The photochemically-induced fluorescence (PIF) properties of these herbicides in several media (water, 2-propanol and their mixtures) and aqueous micellar solutions of sodium dodecyl sulfate (SDS), and cetyltrimethylammonium chloride (CTAC) are reported. The use of micellar media enhances significantly the PIF signal relative to an aqueous solution. A PIF method is developed for the determination of the four herbicides under study, with linear dynamic ranges over about one order of magnitude, and limits of detection (LOD) between 410 and 640 ng mL -1 , according to the compound. Applications to the analysis of tap water and river water samples yield satisfactory recoveries (86-115 %).

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Micellar fluorescence enhancement of carbamate pesticides

Cited by 10 publications

References 14 publications

Supramolecular Systems as an Alternative for Enzymatic Degradation of 1‐Naphthyl Methylcarbamate (Carbaryl) Pesticide

Supramolecular Systems as an Alternative for Enzymatic Degradation of 1‐Naphthyl Methylcarbamate (Carbaryl) Pesticide

Luminescence methods in pesticide analysis. Applications to the environment

Usefulness of micellar media for the quantitative analysis of phenylurea herbicides in water by photochemically-induced fluorescence

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