Simultaneous determination of traces of pyrethroids, organochlorines and other main plant protection agents in agricultural soils by headspace solid-phase microextraction–gas chromatography

Fernández-Álvarez, María; Llompart, Marı́a; Lamas, J. Pablo; Lores, Marta; Garcı́a-Jares, Carmen; Cela, R.; Dagnac, Thierry

doi:10.1016/j.chroma.2008.02.080

Cited by 84 publications

(33 citation statements)

References 21 publications

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“…The bar length is proportional to the influence of each investigated variable or their interactions on the response. These charts include a vertical line corresponding to the 95% confidence interval; the main effects or interactions that exceed this reference line may be considered statistically significant (Fernández-Álvarez et al, 2008). The main effect plots are other graphical valuable tools for the interpretation of experimental design outcomes.…”

Section: Evaluation Of the Spme Process: Factorial Designmentioning

confidence: 99%

Quantitative determination and characterisation of the main odourants of Mencía monovarietal red wines

et al. 2009

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Section: Evaluation Of the Spme Process: Factorial Designmentioning

confidence: 99%

Quantitative determination and characterisation of the main odourants of Mencía monovarietal red wines

et al. 2009

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“…Pyrethroids are usually determined by gas chromatography (GC) [3,4], high-performance liquid chromatography (HPLC) [5,6], capillary electro chromatography (CEC) [7] and enzyme-linked immunosorbent assay (ELISA) [8,9], etc. Gas chromatographic techniques, coupled with mass spectrometry detection (GC-MS) [10,11] and electron capture detection (GC-ECD) [12,13], are usually considered as the best methods to analyze pyrethroids in sample matrices.…”

Section: Introductionmentioning

confidence: 99%

A Novel SPME Fiber Chemically Linked with 1-Vinyl-3-hexadecylimidazolium hexafluorophosphate Ionic Liquid Coupled with GC for the Simultaneous Determination of Pyrethroids in Vegetables

et al. 2012

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A solid-phase microextraction (SPME) fiber chemically linked with ionic liquid (IL), coupled to gas chromatography-electron capture detector (GC-ECD) technique for the simultaneous sampling and determination of pyrethroids has been developed. A novel ionic liquid, 1-vinyl-3-hexadecylimidazolium hexafluorophosphate (ViHDIm ? PF 6 -), was synthesized and used as SPME fiber material. The IL-linked fiber was applied to the determination of seven pyrethroids in vegetables by direct immersion extraction, followed by gas chromatographic separation and electron capture detection. Important extraction parameters, including extraction temperature, extraction time, stirring rate, desorption temperature and time were carefully optimized. Several experiments were carried out to evaluate the analytical characteristics of the SPME-GC-ECD method under optimum conditions. The limits of detection (LODs) for the seven pyrethroids were between 0.07 and 0.29 lg L -1 . The linearity was from 0.1 to 100 lg L -1 for fenpropathrin, from 0.25 to 100 lg L -1 for cypermethrin, permethrin and deltamethrin, and from 0.5 to 100 lg L -1 for flucythrinate, fenvalerate and fluvalinate. Single fiber and fiber-to-fiber reproducibility, expressed as relative standard deviation, were less than 8.10 and 13.27 %, respectively. Compared with the commercial polydimethyl siloxane (PDMS) fiber, the extraction efficiency of the prepared IL-linked fiber for seven pyrethroids was about 20 % higher than that of PDMS fiber. The established SPME-GC-ECD was successfully applied in the detection of pyrethroids in cabbage and cucumber, with LODs of the seven pyrethroids between 0.21 and 0.49 lg kg -1 and recoveries of between 67.40 and 90.38 % in vegetables.

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“…Hence, sample pretreatment and enrichment process become crucial steps in the analytical procedure to obtain accurate and sensitive results. Until now, several methods for sample pretreatments prior to chromatographic separation have been described, such as liquid-liquid extraction (LLE) [12,13], microwave-assisted extraction (MAE) [6], ultrasonic-assisted extraction (UAE) [14], solid-phase extraction (SPE) [15], solidphase microextraction (SPME) [16,17], stir bar sorptive extraction (SBSE) [18] and headspace solid-phase microextraction (HS-SPME) [19]. Although each method above has its advantages, most of these procedures suffer from several disadvantages such as large amounts of poisonous organic solvent, tedious procedure, employment of costly apparatus or low enrichment factors (EFs).…”

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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Simultaneous determination of traces of pyrethroids, organochlorines and other main plant protection agents in agricultural soils by headspace solid-phase microextraction–gas chromatography

Cited by 84 publications

References 21 publications

Quantitative determination and characterisation of the main odourants of Mencía monovarietal red wines

Quantitative determination and characterisation of the main odourants of Mencía monovarietal red wines

A Novel SPME Fiber Chemically Linked with 1-Vinyl-3-hexadecylimidazolium hexafluorophosphate Ionic Liquid Coupled with GC for the Simultaneous Determination of Pyrethroids in Vegetables

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

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