Application of dispersive liquid–liquid microextraction combined with high-performance liquid chromatography to the determination of carbamate pesticides in water samples

Wu, Qiuhua; Zhou, Xin; Li, Yuemin; Zang, Xiaohuan; Wang, Chun; Wang, Zhi

doi:10.1007/s00216-009-2625-z

Cited by 103 publications

(42 citation statements)

References 26 publications

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“…carbaryl, pirimicarb and diethofencarb as salt was added to the water sample. 31 A similar behavior was also reported by Alves et al, who showed that the addition of 1, 5 and 10% NaCl to the aqueous samples caused a decrease in organophosphate extraction. 32 These results indicate that factors such as solubility and polarity, usually used to explain the partition of the analyte between the matrix and the extraction solution, may not be sufficient to completely justify observed differences in analytes recovery.…”

Section: Effect Of Agitation Mode (Ag) Dispersing Solvent Addition (supporting

confidence: 83%

A Multiclass Analytical Method for Pesticides Determination in Water using DLLME and GC-MS

Villa

Dores²,

Silva³

2017

Rev. Virtual Quim.

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Abstract:This work aimed to develop and validate a method for the determination of trifluralin, metribuzin, metolachlor, endosulfan, -cyhalothrin, permethrin and malathion in water using dispersive liquid-liquid microextraction (DLLME). The mixture n-hexane/toluene (60:40 v/v) showed high extraction capacity and was used in the method validation. The method was applied to different surface water samples and a matrix effect was not observed. The DLLME provided recovery of 47-115 % with a RSD up to 16%. The detection limits ranged between 0.0063 and 0.046 µg L -1 whereas the method quantitation limit was 2.0 µg L -1 for all analytes. After validated, the method was applied to water samples collected in an agricultural region of Mato Grosso State, Brazil and only permethrin was detected. The proposed method can be an alternative for the simultaneous determination of multiclass pesticides in water, with the advantage of being fast and using a very small amount of solvent.Keywords: Water; microextraction; pesticide. ResumoEste trabalho teve como objetivo desenvolver e validar um método para a determinação da trifluralina, metribuzin, metolacloro, endosulfan, -cialotrina, permetrina e malationa em água usando microextração líquido-líquido dispersiva (DLLME). A mistura de n-hexano / tolueno (60:40 v/v) mostrou elevada capacidade de extração e foi utilizada na validação do método. O método foi aplicado a diferentes amostras de água superficial e não foi observado um efeito matriz. A DLLME proporcionou uma recuperação de 47-115% com um RSD de até 16%. Os limites de detecção variaram entre 0,0063 e 0,046 mg L -1 enquanto que o limite de quantificação do método foi de 2,0 mg L -1 para todos os analitos. Depois de validado, o método foi aplicado em amostras de água coletadas em uma região agrícola de Mato Grosso, Brasil e somente a permetrina foi detectada. O método proposto pode ser uma alternativa para a determinação simultânea de pesticidas multiclasses em água, com a vantagem de ser rápido e utilizar uma pequena quantidade de solvente.

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Section: Effect Of Agitation Mode (Ag) Dispersing Solvent Addition (supporting

confidence: 83%

A Multiclass Analytical Method for Pesticides Determination in Water using DLLME and GC-MS

Villa

Dores²,

Silva³

2017

Rev. Virtual Quim.

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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%

“…Then, tiny droplets form and disperse among the aqueous sample solution and are further joined and sedimented in bottom of a conical test tube by centrifugation. The resulted sedimented phase is analyzed [13][14][15]23]. Recently, an innovative configuration of DLLME based on ultrasound assisted emulsification-microextraction has been developed [28].…”

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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“…ACE, ACN, MeOH and EtOH were screened in this study. [26][27][28] Experiments were performed taking 500 µl of each disperser solvent with 100 µl of CF. Figure 3c clearly shows that ACN has the highest peak area followed by ACE, EtOH and MeOH.…”

Section: Selection Of Disperser Solvent and Its Volumementioning

confidence: 99%

Coupling Microextraction With Thin Layer Chromatography-Image Processing Analysis: A New Analytical Platform for Drug Analysis

Jain¹,

Singh²,

Sudhaker³

et al. 2017

Toxicol Forensic Med Open J

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Application of dispersive liquid–liquid microextraction combined with high-performance liquid chromatography to the determination of carbamate pesticides in water samples

Cited by 103 publications

References 26 publications

A Multiclass Analytical Method for Pesticides Determination in Water using DLLME and GC-MS

A Multiclass Analytical Method for Pesticides Determination in Water using DLLME and GC-MS

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

Coupling Microextraction With Thin Layer Chromatography-Image Processing Analysis: A New Analytical Platform for Drug Analysis

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