Evaluation of various QuEChERS based methods for the analysis of herbicides and other commonly used pesticides in polished rice by LC–MS/MS

Pareja, Lucía; Cesio, Verónica; Heinzen, Horácio; Fernández‐Alba, Amadeo R.

doi:10.1016/j.talanta.2010.11.052

Cited by 122 publications

(73 citation statements)

References 28 publications

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“…But remarkably low recovery (only 8.4 % with RSD<5.4 %) was observed for imazethapyr (Fig. 4), which probably was due to the -COOH group in imazethapyr that reacts with the -NH 2 group of PSA (Pareja et al 2011). With florisil clean-up also, imazethapyr gave remarkably low recovery of 21.1±12.54 %.…”

Section: −1mentioning

confidence: 94%

“…For determining pesticide residues in food matrices of low water content or high fat content, the sample size for extraction is reduced and water added to make sample pores more accessible to the extraction solvent (Walorczyk, 2008;Pareja et al 2011). Different trial approaches were examined in a pilot study and the efficiency of the extraction process was comparatively assessed considering the relative standard deviation (RSD) values.…”

Section: Optimization Of Extraction Stepmentioning

confidence: 99%

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Simultaneous analysis of herbicides pendimethalin, oxyfluorfen, imazethapyr and quizalofop-p-ethyl by LC–MS/MS and safety evaluation of their harvest time residues in peanut (Arachis hypogaea L.)

et al. 2014

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This paper reports a simple and rapid method for simultaneous determination of the residues of selected herbicides viz. pendimethalin, oxyfluorfen, imazethapyr and quizalofop-p-ethyl in peanut by liquid chromatographytandem mass spectrometry (LC-MS/MS). A modified approach of the QuEChERS methodology was used to extract the herbicides from the peanut kernel without any clean-up. The method showed excellent linearity (r 2 >0.99) with no significant matrix effect. Accuracy of the method in terms of average recoveries of all the four herbicides ranged between 69.4 -94.4 % at spiking levels of 0.05, 0.10 and 0.25 mg kg −1 with intra-day and inter-day precision RSD (%) between 2.6-16.6 and 8.0-11.3, respectively. Limit of quantification (LOQs) was 5.0 μg kg −1 for pendimethalin, imazethapyr and quizalofop-p-ethyl and 10.0 μg kg −1 for oxyfluorfen. The expanded uncertainties were <11 % for determination of these herbicides in peanut. The proposed method was successfully applied for analysis of these herbicide residues in peanut samples harvested from the experimental field and the residues were below the detection level.

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Section: −1mentioning

confidence: 94%

Section: Optimization Of Extraction Stepmentioning

confidence: 99%

Simultaneous analysis of herbicides pendimethalin, oxyfluorfen, imazethapyr and quizalofop-p-ethyl by LC–MS/MS and safety evaluation of their harvest time residues in peanut (Arachis hypogaea L.)

et al. 2014

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“…Anastassiades et al (2003) described the application of QuEChERS for extraction of carbaryl in other matrices, using unbuffered original QuEChERS approach (QuEChERS A), dispersive AOAC 2007.01 method (QuEChERS B, (MethodAOAC 2007)), and European Norm EN15662 (QuEChERS C, (EN15662 2008)). Pareja et al (2011) examined three types of QuEChERS for extraction of carbaryl in rice achieving recoveries between 102.6% and 106.5%, 90.1% and 108.2%, and 97.3% and 114.7% using the unbuffered original QuEChERS approach, acetate buffer, and citrate buffer QuEChERS, respectively. To the unbuffered original QuEChERS approach (Anastassiades et al 2003), sodium acetate was added and this modified QuEChERS was used for extraction of carbaryl in samples, such as meat, beverages (milk, coffee, red wine, and grape and orange juices), fruits and vegetables, bread, rice, cake, cheese, chocolate, corn oil, peanut, peanut butter, potato chips, walnut, oyster sauce, chestnut, egg, oyster, persimmon, pumpkin, and soy bean.…”

Section: Extraction Proceduresmentioning

confidence: 99%

QuEChERS: a sample preparation for extraction of carbaryl from rat feces

Paíga

Domingues

Wanderley

et al. 2015

Toxicological & Environmental Chemistry

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Carbamate compounds are an important group of cholinesterase inhibitors. There is a need for creating awareness regarding the risks of the inadequate carbamate use in the residential areas due to potential adverse human effects. Carbaryl is a commonly used pesticide worldwide. A simple, fast, and high-throughput method was developed employing liquid chromatography with fluorescence detector to determine carbaryl residues in rat feces. The extraction was performed by using a rapid, easy, cheap, effective, reliable, and safe (QuEChERS) method, using acetonitrile as the extracting solvent. The parameters for the performance of the extraction method were optimized, such as ratio of mass of sample per volume of extraction solvent, QuEChERS content, and cleanup columns. Linear response was obtained for all calibration curves (solvent and matrix-matched) over the established concentration range (5 500 mg/L) with a correlation coefficients higher than 0.999. The achieved recovery was 97.9% with relative standard deviation values of 1.1% (n 4) at 167 mg/kg fortified concentration level and the limits of detection and quantification were 27.7 and 92.3 mg/kg, respectively.

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“…Recently, the Quick, Effective, Cheap, Effective, Rugged and Safe (QuEChERS) technique was developed, primarily for extraction of multiclass pesticide residues in non-fatty matrices such as sugarcane honey [19], honey [20,21], fruits and vegetables [22,23] and its application has subsequently been extended to the extraction of multiclass pesticide residues from high fat matrices such as raw cereals and their processed products [23][24][25][26][27][28][29][30]. The QuEChERS method eliminates several time consuming and complicated sample pretreatment steps commonly employed in traditional methods [2].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, although QuEChERS procedure nowadays, is a method of choice for analysis of multiclass pesticides residues in various solid and semi-solid samples, it does not involve preconcentration (enrichment) of the target analytes [31,32]. Quantitative determination of the final extract of the sample has commonly been performed utilizing highly sensitive analytical techniques such as gas (GC) and/or liquid chromatography (LC) coupled with mass spectrometry (MS) or tandem mass spectrometric (MS/MS) detectors [3,23,25,30,33,34].…”

Section: Introductionmentioning

confidence: 99%

The QuEChERS analytical method combined with low density solvent based dispersive liquid–liquid microextraction for quantitative extraction of multiclass pesticide residues in cereals

Bedassa¹,

Gure²,

Megersa³

2017

Bull. Chem. Soc. Eth.

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ABSTRACT. In this study, a combination QuEChERS and low density solvent based DLLME was developed for extraction and preconcentration of five multiclass pesticide residues including atrazine, ametryn, terbutryn, carbaryl and chlorothalonil, from selected cereals: Teff, barley and maize samples. Liquid chromatography with variable wavelength detector (VWD) was used for quantitative determination of the pesticides. Various experimental parameters affecting the extraction and the preconcentration efficiencies were optimized. Calibration curves constructed using Teff samples were linear over wide ranges, 7.1-200 μg kg -1 with R 2 ≥ 0.990. LODs of the method were ≤ 8.9 μg kg -1 , below the MRLs of EU for maize and barley. The RSDs were in the range of 2.3-9.5%. The method has also been applied to different cereal samples and satisfactory average recoveries ranging 69.0-117% were obtained for the spiked cereal samples at two concentration levels. Therefore, the developed method can be successfully utilized as a simple alternative for the analysis of multiclass pesticide residues in cereals and other related samples.

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Evaluation of various QuEChERS based methods for the analysis of herbicides and other commonly used pesticides in polished rice by LC–MS/MS

Cited by 122 publications

References 28 publications

Simultaneous analysis of herbicides pendimethalin, oxyfluorfen, imazethapyr and quizalofop-p-ethyl by LC–MS/MS and safety evaluation of their harvest time residues in peanut (Arachis hypogaea L.)

Simultaneous analysis of herbicides pendimethalin, oxyfluorfen, imazethapyr and quizalofop-p-ethyl by LC–MS/MS and safety evaluation of their harvest time residues in peanut (Arachis hypogaea L.)

QuEChERS: a sample preparation for extraction of carbaryl from rat feces

The QuEChERS analytical method combined with low density solvent based dispersive liquid–liquid microextraction for quantitative extraction of multiclass pesticide residues in cereals

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