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

Bautista, Adrienne C.; Aaron, Jean‐Jacques; Mahedero, M. C.; Peña, Arsenio Muñoz de la

doi:10.1051/analusis:1999154

Cited by 30 publications

(18 citation statements)

References 20 publications

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“…Generally, PIF methods are considered as efficient fluorophore-generating systems for stationary media [132][133][134][135][136][137][138][139][140][141] as well as for flowing devices such as HPLC post-column photoreaction [142,[145][146][147][148][149] or FIA [21,[142][143][144]. Among the various parameters controlling the analyte conversion photoreaction and method sensitivity, two are particularly important, namely the optimum UV irradiation time (t irr opt , corresponding to the maximum PIF signal) [132,135,138] and the type of solvent [132,135,138,142,149].…”

Section: Pif Optimal Analytical Conditionsmentioning

confidence: 99%

“…PIF has also been used in stationary media, yielding fluorescent photoproducts from several families of naturally nonfluorescent pesticides, including aromatic pesticides, chlorophenoxy acids, sulfonylurea and phenylurea herbicides [132][133][134][135][136][137][138][139][140][141]. The PIF properties of these compounds were investigated in various solvents.…”

Section: Pif In Stationary Mediamentioning

confidence: 99%

“…The LODs are in the low nanogram range. The use of aqueous micellar media [137][138][139][140][141] and cyclodextrins solutions [135,136] improve the sensitivity and the selectivity of PIF in a number of cases. Generally, the plots of pesticide PIF intensity versus the logarithm of surfactant concentration present a sudden increase of PIF signal with increasing the surfactant concentration close to the critical micellar concentration (cmc) value (Fig.…”

Section: Pif In Stationary Mediamentioning

confidence: 99%

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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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Section: Pif Optimal Analytical Conditionsmentioning

confidence: 99%

Section: Pif In Stationary Mediamentioning

confidence: 99%

Section: Pif In Stationary Mediamentioning

confidence: 99%

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Luminescence methods in pesticide analysis. Applications to the environment

Aaron¹,

Coly²

2000

Analusis

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“…Phenylurea herbicides are widely used because of their inhibition of photosynthesis that provides pre-and post-emergence control of many annual and perennial weeds in rice, corn, soybean, cotton and potato crops [1,3]. Owing to their high toxicity [4] and possible carcinogenicity, the determination of phenylurea herbicides at low concentrations in agricultural samples is of prime importance.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of 15 phenylurea herbicides in rice and corn using HPLC with fluorescence detection combined with UV decomposition and post-column derivatization

Mou

Chen

Zhi

2008

Journal of Chromatography B

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“…Methods for chlorophenols [12], phenylurea herbicides [12], dinitroanilines [13], phenylcarbamates [14], phenylamides [14], pyrethroid insecticides [15], chlorophenoxyacid herbicides [16,17], phenylurea herbicides [18] and sulfonylurea herbicides [19,20] have been recently described.…”

Section: Introductionmentioning

confidence: 99%