Modified QuEChERS method for the analysis of 11 pesticide residues in tea by liquid chromatography–tandem mass spectrometry

Guan, Yaqian; Tang, Hua; Chen, Dazhou; Xu, Tao; Li, Lei

doi:10.1039/c3ay40441b

Cited by 25 publications

(15 citation statements)

References 29 publications

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“…The composition of the mobile phase can influence the response values of analytes in LC-MS/MS detection (Guan, Tang, Chen, Xu, & Li, 2013). In this study, three kinds of mobile phase system were used: the first system was water-ACN; the second system was 5.0 mmol/L of ammonium acetate in water-ACN; the third system was 0.1% of formic acid and 5.0 mmol/L of ammonium acetate in water-ACN.…”

Section: Optimization Of Hplc-ms/ms Conditionsmentioning

confidence: 99%

Determination of methenamine residues in edible animal tissues by HPLC-MS/MS using a modified QuEChERS method: Validation and pilot survey in actual samples

Zhang

Duhoranimana

et al. 2016

Food Control

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Section: Optimization Of Hplc-ms/ms Conditionsmentioning

confidence: 99%

Determination of methenamine residues in edible animal tissues by HPLC-MS/MS using a modified QuEChERS method: Validation and pilot survey in actual samples

Zhang

Duhoranimana

et al. 2016

Food Control

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“…These techniques are easy to carry out and provide good recoveries. Nevertheless, they are time consuming, labor intensive, consume a high amount of organic solvent and have poor repeatability .…”

Section: Introductionmentioning

confidence: 99%

Determination of four sulfonylurea herbicides in tea by matrix solid‐phase dispersion cleanup followed by dispersive liquid–liquid microextraction

Liang

Wang

Liu

et al. 2014

J of Separation Science

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Matrix solid-phase dispersion combined with dispersive liquid-liquid microextraction has been developed as a new sample pretreatment method for the determination of four sulfonylurea herbicides (chlorsulfuron, bensulfuron-methyl, chlorimuron-ethyl, and pyrazosulfuron) in tea by high-performance liquid chromatography with diode array detection. The extraction and cleanup by matrix solid-phase dispersion was carried out by using CN-silica as dispersant and carbon nanotubes as cleanup sorbent eluted with acidified dichloromethane. The eluent of matrix solid-phase dispersion was evaporated and redissolved in 0.5 mL methanol, and used as the dispersive solvent of the following dispersive liquid-liquid microextraction procedure for further purification and enrichment of the target analytes before high-performance liquid chromatography analysis. Under the optimum conditions, the method yielded a linear calibration curve in the concentration range from 5.0 to 10 000 ng/g for target analytes with a correlation coefficients (r(2)) ranging from 0.9959 to 0.9998. The limits of detection for the analytes were in the range of 1.31-2.81 ng/g. Recoveries of the four sulfonylurea herbicides at two fortification levels were between 72.8 and 110.6% with relative standard deviations lower than 6.95%. The method was successfully applied to the analysis of four sulfonylurea herbicides in several tea samples.

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“…The versatility of QuEChERS has been demonstrated by its acceptance outside of its traditional application areas. Different matrices such as fish (Ramalhosa et al 2009), cereals (Sospedra et al 2010), tree nuts (Chung and Chan 2010), egg (Chung and Chan 2010), cheese (Chung and Chan 2010), dough , seeds ), vegetable oils (Polg' ar et al 2012, grains (Zhao et al 2013), straw (Zhao et al 2013), green plants (Zhao et al 2013), olives (Cunha et al 2007), chocolates (Chung and Chan 2010), baby food (Wang and Leung 2009), tobacco (Lee et al 2008), honey (Tomasini et al 2011), musts (Cunha et al 2009), beverages (Chung and Chan 2010;Guan et al 2013), meat (Sun et al 2007), barley (Wu et al 2011), whole blood (Plossl et al 2006), animal tissue (Stubbings and Bigwood 2009), and soil (Braganç a et al 2012;Correia-S' a et al 2012) were studied. According to this wide application, this extraction technique will continue to expand as a successful preparation technique.…”

Section: Introductionmentioning

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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Modified QuEChERS method for the analysis of 11 pesticide residues in tea by liquid chromatography–tandem mass spectrometry

Cited by 25 publications

References 29 publications

Determination of methenamine residues in edible animal tissues by HPLC-MS/MS using a modified QuEChERS method: Validation and pilot survey in actual samples

Determination of methenamine residues in edible animal tissues by HPLC-MS/MS using a modified QuEChERS method: Validation and pilot survey in actual samples

Determination of four sulfonylurea herbicides in tea by matrix solid‐phase dispersion cleanup followed by dispersive liquid–liquid microextraction

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

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