The analyses of fungicides, herbicides and insecticides

Aaron, Jean‐Jacques; Tran‐Minh, Canh; Colliss, Janet S.; Smart, N. A.

doi:10.1039/ap9933000072

Cited by 8 publications

(3 citation statements)

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“…[26][27][28][29][30][31] Spectrophotometric methods have also been applied for this purpose. [32][33][34][35][36][37][38] This present work is a continuation of the authors' research on the possibility of the application of derivative spectrophotometry (DS) in the analysis of multi-component systems, allowing an increase in the selectivity of spectrophotometric determination. The DS method has been applied to the determination of phenols in two-component mixtures 39,40 and specific pesticides in two-and three-component mixtures.…”

Section: Introductionmentioning

confidence: 86%

Derivative spectrophotometry in the analysis of mixtures of phenols and herbicides

Baranowska

Pieszko

2000

Analyst

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Derivative spectrophotometry (zero-crossing technique) was applied to the determination of selected phenols and herbicides in two-component mixtures. Methyl- and chlorophenols (3-methylphenol, 2,3- and 3,4-dimethylphenol, 2,5-, 2,6- and 3,4-dichlorophenol and 2,4,5-trichlorophenol) and triazine, uracil and urea herbicides (simazine, propazine, hexazinone, bromacil and metoxuron) were examined. The RSD values ranged between 0.05 and 4% and the recoveries obtained were between 97 and 110%. The developed derivative spectrophotometric method was also applied as a complementary technique for the separation of overlapping peaks of sample compounds obtained by HPLC with diode-array detection. Metoxuron and 3-methylphenol, metoxuron and 2,5-dichlorophenol and simazine and 2,6-dichlorophenol were determined simultaneously by this method at the level of 1 x 10(-3) g l-1.

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Section: Introductionmentioning

confidence: 86%

Derivative spectrophotometry in the analysis of mixtures of phenols and herbicides

Baranowska

Pieszko

2000

Analyst

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“…Some of them are based on the immobilisation of the enzyme on controlled-pore glass (CPG)-based reactors [53,54]. Others use a single bead string reactor (SBSR), improving the mixing of the reagents with the sample and reducing the sample dispersion and the flow resistance [55,56]. It was demonstrated that the oxidation of the organophosphorous compounds to their oxon forms by bromine, prior to analysis, enhances the sensitivity of the pH measurement and decreases the detection limit [36].…”

Section: Flow-based Enzymatic Sensing Systemsmentioning

confidence: 99%

Trends in Flow-based Biosensing Systems for Pesticide Assessment

Prieto‐Simón

Campàs

Andreescu

et al. 2006

Sensors

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This review gives a survey on the state of the art of pesticide detection using flow-based biosensing systems for sample screening. Although immunosensor systems have been proposed as powerful pesticide monitoring tools, this review is mainly focused on enzyme-based biosensors, as they are the most commonly employed when using a flow system. Among the different detection methods able to be integrated into flow-injection analysis (FIA) systems, the electrochemical ones will be treated in more detail, due to their high sensitivity, simple sample pretreatment, easy operational procedures and real-time detection. During the last decade, new trends have been emerging in order to increase the enzyme stability, the sensitivity and selectivity of the measurements, and to lower the detection limits. These approaches are based on (i) the design of novel matrices for enzyme immobilisation, (ii) new manifold configurations of the FIA system, sometimes including miniaturisation or lab-on-chip protocols thanks to micromachining technology, (iii) the use of cholinesterase enzymes either from various commercial sources or genetically modified with the aim of being more sensitive, (iv) the incorporation of other highly specific enzymes, such as organophosphate hydrolase (OPH) or parathion hydrolase (PH) and (v) the combination of different electrochemical methods of detection. This article discusses these novel strategies and their advantages and limitations.

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“…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.…”

Section: Introductionmentioning

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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The analyses of fungicides, herbicides and insecticides

Cited by 8 publications

References 0 publications

Derivative spectrophotometry in the analysis of mixtures of phenols and herbicides

Derivative spectrophotometry in the analysis of mixtures of phenols and herbicides

Trends in Flow-based Biosensing Systems for Pesticide Assessment

Luminescence methods in pesticide analysis. Applications to the environment

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