Development of a new dispersive liquid–liquid microextraction method in a narrow-bore tube for preconcentration of triazole pesticides from aqueous samples

Farajzadeh, Mir Ali; Djozan, Djavanshir; Khorram, Parisa

doi:10.1016/j.aca.2011.11.030

Cited by 82 publications

(29 citation statements)

References 35 publications

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“…Considering the fact that fruit juices are becoming more and more popular, it is necessary to develop sensitive and selective methods for the analysis of triazole fungicide residues usually present in trace amounts. Many chromatographic analytical methods for the trace determination of triazole fungicide residues in water and fruit juice samples included gas chromatography (GC) (Bordagaray et al 2011;Farajzadeh et al 2010Farajzadeh et al , 2011Farajzadeh et al , 2012Farajzadeh and Khoshmaram 2013;Freitas et al 2014;Li et al 2014;Sarafraz-Yazdi et al 2012), GC with mass spectrometry (GC-MS) (Farajzadeh et al 2012;Freitas et al 2014;Sarafraz-Yazdi et al 2012), GC with tandem mass spectrometry (GC-MS/MS) (Li et al 2011, highperformance liquid chromatography (HPLC) (Bordagaray et al 2013(Bordagaray et al , 2014Gao et al 2012;Luo et al 2013;Wang et al 2011;Ye et al 2012), HPLC with tandem mass spectrometry (HPLC-MS/MS) (Juan-Garcia et al 2004;Li et al 2013;Wang et al 2014;Zhang and Xu 2014), and capillary electrophoresis (CE) (Chicharro et al 2003;Rodriguez et al 2001;Wu et al 2001). On the other hand, quick and effective sample preparation coupled with a reliable analytical method is imperative.…”

Section: Introductionmentioning

confidence: 99%

Vortex-Assisted Ionic Liquid Dispersive Liquid-Liquid Microextraction Coupled with High-Performance Liquid Chromatography for the Determination of Triazole Fungicides in Fruit Juices

Zhang

Zhao

et al. 2015

Food Anal. Methods

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A rapid, efficient, and environmentally friendly method using vortex-assisted ionic liquid dispersive liquidliquid microextraction (VA-IL-DLLME) prior to highperformance liquid chromatography coupled with photodiode array detection (HPLC-PDA) has been developed for the determination of six triazole fungicides (triazolone, triadimenol, epoxiconazole, flusilazole, tebuconazole, and diniconazole) in various fruit juices. 1-Hexyl-3-methylimidazolium hexafluorophosphate ([C 6 MIM][PF 6 ]) and acetonitrile were used as extraction and dispersive solvents, respectively. A single factor experiment was selected to obtain the significant variables from the several related parameters that could affect the extraction efficiencies, such as the volume of IL and acetonitrile, extraction time, centrifugation time, and salt addition. Under the optimum conditions, an excellent linearity with correlation coefficients higher than 0.997 was obtained. Enrichment factors and average recoveries in three concentration levels ranged from 51 to 72, and 71.0 to 104.5 %, respectively, and the relative standard deviations (RSDs) from 1.4 to 11.8 %. The limits of detection (LODs) (S/N=3) for the six triazole fungicides were between 0.4 and 6.7 μg L −1 . The proposed method was successfully applied for the determination of trace amounts of triazole fungicides in various fruit juices including peach, apple, and orange juices.

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Section: Introductionmentioning

confidence: 99%

Vortex-Assisted Ionic Liquid Dispersive Liquid-Liquid Microextraction Coupled with High-Performance Liquid Chromatography for the Determination of Triazole Fungicides in Fruit Juices

Zhang

Zhao

et al. 2015

Food Anal. Methods

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“…Increasing the sample volume also increases the amount of target analytes transferred into the acceptor phase [30]. Different volumes ranging from 2 to 10 mL were then examined to assess the effect of sample volume.…”

Section: Volume Of Sample Phasementioning

confidence: 99%

Two-phase/Three-phase Hollow Fibre Liquid-Phase Simultaneous Microextraction Combined with HPLC for Analysis of Phenolic Acids and Flavonoids in Traditional Chinese Medicine

Chen

et al. 2015

Chromatographia

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“…This variant is called DLLME-Solidification of Floating Organic droplet (DLLME-SFO) [31,32]. Special devices with narrow tube necks are required to facilitate the collection of floated extracts [33,34]. Additionally, another solvent with higher density than water (an auxiliary solvent) can be added to adjust the density of the extraction solvent.…”

Section: Introductionmentioning

confidence: 99%

Fast, sensitive and reliable multi-residue method for routine determination of 34 pesticides from various chemical groups in water samples by using dispersive liquid–liquid microextraction coupled with gas chromatography–mass spectrometry

Tankiewicz

Biziuk

2017

Anal Bioanal Chem

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A simple and efficient dispersive liquid-liquid microextraction technique (DLLME) was developed by using a mixture of two solvents: 40 μL of tetrachlorethylene (extraction solvent) and 1.0 mL of methanol (disperser solvent), which was rapidly injected with a syringe into 10 mL of water sample. Some important parameters affecting the extraction efficiency, such as type and volume of solvents, water sample volume, extraction time, temperature, pH adjustment and salt addition effect were investigated. Simultaneous determination of 34 commonly used pesticides was performed by using gas chromatography coupled with mass spectrometry (GC-MS). The procedure has been validated in order to obtain the highest efficiency at the lowest concentration levels of analytes to fulfill the requirements of regulations on maximum residue limits. Under the optimum conditions, the linearity range was within 0.0096-100 μg L −1 . The limits of detection (LODs) of the developed DLLME-GC-MS methodology for all investigated pesticides were in the range of 0.0032 (endrin)-0.0174 (diazinon) μg L −1 and limits of quantification (LOQs) from 0.0096 to 0.052 μg L −1 . At lower concentration of 1 μg L −1 for each pesticide, recoveries ranged between 84% (tebufenpyrad) and 108% (deltamethrin) with relative standard deviations (RSDs) (n = 7) from 1.1% (metconazole) to 11% (parathion-mehtyl). This methodology was successfully applied to check contamination of environmental samples. The procedure has proved to be selective, sensitive and precise for the simultaneous determination of various pesticides. The optimized analytical method is very simple and rapid (less than 5 min).

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Development of a new dispersive liquid–liquid microextraction method in a narrow-bore tube for preconcentration of triazole pesticides from aqueous samples

Cited by 82 publications

References 35 publications

Vortex-Assisted Ionic Liquid Dispersive Liquid-Liquid Microextraction Coupled with High-Performance Liquid Chromatography for the Determination of Triazole Fungicides in Fruit Juices

Vortex-Assisted Ionic Liquid Dispersive Liquid-Liquid Microextraction Coupled with High-Performance Liquid Chromatography for the Determination of Triazole Fungicides in Fruit Juices

Two-phase/Three-phase Hollow Fibre Liquid-Phase Simultaneous Microextraction Combined with HPLC for Analysis of Phenolic Acids and Flavonoids in Traditional Chinese Medicine

Fast, sensitive and reliable multi-residue method for routine determination of 34 pesticides from various chemical groups in water samples by using dispersive liquid–liquid microextraction coupled with gas chromatography–mass spectrometry

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