Validation of method for determination of different classes of pesticides in aqueous samples by dispersive liquid–liquid microextraction with liquid chromatography–tandem mass spectrometric detection

Caldas, Sergiane Souza; Costa, Fabiane Pinho; Prímel, Ednei Gilberto

doi:10.1016/j.aca.2010.03.004

Cited by 96 publications

(49 citation statements)

References 44 publications

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“…HPLC with a variety of detection systems, i.e., ultraviolet [8,[13][14][15], fluorescence [16,17], chemiluminescence [18], and mass spectrometry [19], is the preferred choice for analysis of carbamate pesticides. However, the carbamate components and their contents in different samples are very different.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of an ultrasound-assisted surfactant-enhanced emulsification microextraction method for liquid chromatographic determination of carbamate residues in fruit juices

Vichapong¹,

Burakham²

2015

Acta Chromatographica

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Summary.A microextraction procedure based on ultrasound-assisted surfactantenhanced emulsification microextraction (UASEME) was optimized and validated for preconcentration of carbamate pesticides prior to fast determination using high-performance liquid chromatography (HPLC) with monolithic column. The nonionic surfactant (Tween 20) was used as an emulsifier, and chloroform was selected as an extraction solvent. The experimental parameters affecting the extraction efficiency, such as the kind, concentration, and volume of surfactant, the kind of extraction solvent and its volume, salt addition, ultrasonic extraction time, and centrifugation time, were optimized. Under the selected UASEME and HPLC conditions, separation of five carbamate pesticides (carbofuran, carbaryl, isoprocarb, methiocarb, and promecarb) was achieved within 10 min. The linearity of the method was obtained in the wide range of 2-5000 μg L −1 , with correlation coefficients of 0.9931-0.9970. The limits of detection were in the range of 0.4-7.0 μg L −1 . The relative standard deviations (n = 5) were less than 0.59% and 4.86% for retention time and peak area, respectively. The enrichment factors of the developed UASEME method were in the range of 33-166. The fruit juice samples (at fortified levels of 0.25, 0.50, and 1.00 mg L −1 ) were successfully analyzed, and the relative recoveries were obtained in the range of 81-115%.

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Section: Introductionmentioning

confidence: 99%

Development and validation of an ultrasound-assisted surfactant-enhanced emulsification microextraction method for liquid chromatographic determination of carbamate residues in fruit juices

Vichapong¹,

Burakham²

2015

Acta Chromatographica

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“…The advantages of DLLME are simplicity, rapidity, low cost and high EFs [32]. DLLME has been successfully applied for the determination of different pollutants in various water samples [33][34][35][36][37]. However, due to its lack of special selectivity, DLLME is confronted with difficulty of extracting target analytes from complex samples.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized matrix solid‐phase dispersion combined with ultrasound‐assisted dispersive liquid–liquid microextraction for the determination of three pyrethroids in soil

Wang

Yan

Qiao

2011

J of Separation Science

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A simple and miniaturized pretreatment procedure combining matrix solid-phase dispersion (MSPD) with ultrasound-assisted dispersive liquid-liquid microextraction (UA-DLLME) technique was proposed in first time for simultaneous determination of three pyrethroids (fenpropathrin, cyhalothrin and fenvalerate) in soils. The solid samples were directly extracted using MSPD procedure, and the eluent of MSPD was used as the dispersive solvent of the followed DLLME procedure for further purification and enrichment of the analytes before GC-ECD analysis. Good linear relationships were obtained for all the analytes in a range of 5.0-500.0 ng/g with LOQs (S/N=10) ranged from 1.51 to 3.77 ng/g. Average recoveries at three spiked levels were in a range of 83.6-98.5% with RSD≤7.3%. The present method combined the advantages of MSPD and DLLME, and was successfully applied for the determination of three pyrethroids in soil samples.

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“…In most of the reported studies only one chemical class of pesticides was evaluated, being the number of pesticide residues scarce (less than eighteen analytes). However, in a recent publication different classes of pesticides namely triazole fungicides, isoxazolidinone herbicides and carbamates were simultaneously evaluated, although the number of analytes pertaining at each class has been reduced (three) (Caldas et al, 2010). After optimization of the parameters that influence the extraction efficiency, such as the type and volume of the dispersive and extractant solvents, extraction time, speed of centrifugation, pH and addition of salt, the extraction of pesticide residues from 5 mL of water was achieved with a mixture of 2.0 mL acetonitrile (dispersive solvent) containing 60 µL of carbon tetrachloride (extractant solvent), followed by centrifugation at 2000 rpm for 5 min; the analysis was performed by LC-MS/MS.…”

Section: Dispersive Liquid-liquid Microextraction (Dllme)mentioning

confidence: 99%

Current Trends in Liquid-Liquid Microextraction for Analysis of Pesticide Residues in Food and Water

Cunha¹,

Fernandes²,

Oliveira³

2011

Pesticides - Strategies for Pesticides Analysis

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Validation of method for determination of different classes of pesticides in aqueous samples by dispersive liquid–liquid microextraction with liquid chromatography–tandem mass spectrometric detection

Cited by 96 publications

References 44 publications

Development and validation of an ultrasound-assisted surfactant-enhanced emulsification microextraction method for liquid chromatographic determination of carbamate residues in fruit juices

Development and validation of an ultrasound-assisted surfactant-enhanced emulsification microextraction method for liquid chromatographic determination of carbamate residues in fruit juices

Miniaturized matrix solid‐phase dispersion combined with ultrasound‐assisted dispersive liquid–liquid microextraction for the determination of three pyrethroids in soil

Current Trends in Liquid-Liquid Microextraction for Analysis of Pesticide Residues in Food and Water

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