Liquid chromatography–electrospray ionization tandem mass spectrometry and dynamic multiple reaction monitoring method for determining multiple pesticide residues in tomato

Andrade, Graziela C. R. M.; Monteiro, Sérgio Henrique; Francisco, Jeane G.; Figueiredo, LF Poli de; Botelho, Rafael Guimarães; Tornisielo, Valdemar Luiz

doi:10.1016/j.foodchem.2014.11.105

Cited by 82 publications

(32 citation statements)

References 28 publications

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“…For data acquisition, the software Agilent Mass Hunter was used. For the detection in the MS/MS, the MRM (multiple reaction monitoring) mode was used (Andrade et al, 2015).…”

Section: Lc-ms/ms Analysesmentioning

confidence: 99%

Determination of pesticides residues in quinoa (Chenopodium quinoa Willd) using QuEChERS and LC-MS/MS

Vilca

Andrade²,

Cuba

et al. 2018

Emir J Food Agric

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The QuEChERS method was optimized and validated for the determination of 40 pesticides in 37 samples of quinoa from the harvest 2010-2011 in Puno - Peru. The method involves extraction with 1% acetic acid acetonitrile with CH3COONa anhydrous and MgSO4 followed by dispersive solid-phase extraction with PSA and C18. Analyses were performed with LC-MS/MS using C18 column 150 mm x 2.1 x 3.5 µm, water and acetonitrile 0.1% formic acid used as mobile phase. Spiked quinoa blank at 0.01 and 0.1 mg kg-1 was employed to evaluate recovery ranging from the 31.6 and 125.1% with RSD ≤ 23. The method showed linearity r2 ≥ 0.99 and limits of quantification ranged from 0.001 and 0.01 mg kg-1, and was not observed a matrix effects. No pesticides residues were observed in the analyzed samples.

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“…For data acquisition, the software Agilent Mass Hunter was used. For the detection in the MS/MS, the MRM (multiple reaction monitoring) mode was used (Andrade et al, 2015).…”

Section: Lc-ms/ms Analysesmentioning

confidence: 99%

Determination of pesticides residues in quinoa (Chenopodium quinoa Willd) using QuEChERS and LC-MS/MS

Vilca

Andrade²,

Cuba

et al. 2018

Emir J Food Agric

View full text Add to dashboard Cite

show abstract

“…In this study, the Delta RT was fixed at 1 min. 10 Table 2 shows peak height before and after optimization. At one hand, some pesticides had a slight increase in peak height, for example, clothianidin and cymoxanil had shown a 0.42 and 1.99% increase in peak height.…”

Section: Optimization Of Lc-ms/ms Analysismentioning

confidence: 99%

“…Thus, LC-MS/MS with electrospray ion (ESI) source, operated in multiple reaction monitoring (MRM) mode has become the predominant analysis technique in the detection of multiresidue pesticides due to its outstanding selectivity and high sensitivity. [7][8][9][10] Vol. 27, No.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Dynamic multiple reaction monitoring (DMRM) is an alternative to the use of MRM; this mode avoids the need to define segments of timeframe for the selected group of transitions, based on retention time, number of target species, and dwell time. In fact, "virtual" time segments are automatically constructed by the software during the analysis (as a timeframe of continuous movement during the analysis time), improving the shape of the peak and increasing the sensitivity.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, "virtual" time segments are automatically constructed by the software during the analysis (as a timeframe of continuous movement during the analysis time), improving the shape of the peak and increasing the sensitivity. 10 Brazil is the third largest fruit producer worldwide and an important exporter of tropical and subtropical fresh and processed fruits, mainly to European countries and the United States. 11 Results from Brazilian pesticide monitoring programs have shown that almost half of the 13,556 samples of 22 different crops analyzed tested positive for at least one pesticide.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Pesticides in Grape Juices by QuEChERS and Liquid Chromatography-Tandem Mass Spectrometry

Souza¹,

Souza²,

Borges³

2016

Journal of the Brazilian Chemical Society

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In this study, we describe a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for quantifying 25 pesticides in grape juice. This method was optimized and validated according with INMETRO (Instituto Nacional de Metrologia Qualidade e Tecnologia) for the simultaneous determination of pesticide, which are widely used in grape culture in Brazil. The method was based on the QuEChERS (quick, easy, cheap, effective, rugged and safe) methodology. We used AOAC Official Method 2007.01 and Standard Method EN 15662 for sample preparation, both methods presented statistically equivalent recoveries and coefficients of variation. At 0.005 and 2 mg L -1 , fortified blank grape juices had average recoveries of 101 and 112% and average coefficients of variation of 16 and 11%, respectively. The repeatability was tested in three concentrations 0.005, 0.1 and 2 mg L -1 , affording coefficients of variation 16.4, 20.7 and 10.8%, respectively.

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Molecularly imprinted fluorescent probe based on hydrophobic CdSe/ZnS quantum dots for the detection of methamidophos in fruit and vegetables

Liu

Kong

et al. 2017

Adv Polym Technol

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In this study, a molecularly imprinted polymer (MIP)-fluorescent probe based on hydrophobic CdSe/ZnS quantum dots (CdSe/ZnS@MIP) was designed and synthesized by bulk polymerization for detecting methamidophos (MAP). The CdSe/ ZnS@MIP was characterized by Fourier-transform infrared spectroscopy, thermo-gravimetric analysis and adsorption properties, and it exhibited good adsorption capacity and fluorescent stability, and excellent selectivity. Under optimal conditions, the fluorescence showed a good linear decrease in the range of 3.50 × 10 −7 -0.71 × 10 −3 mol/L with a correlation coefficient of 0.995. The limit of detection of the fluorescent probe was 9.16 × 10 −8 mol/L, and the relative standard deviation of the method for nine replicate analyses of 4.0 × 10 −6 mol/L MAP was 4.1%. Apple and pear samples spiked with MAP at three levels were extracted and determined by the presented method with good recoveries (89.7%-94.9%). The accuracy of the method was verified by gas chromatography for the detection of kidney beans, leek and cucumber samples, and no significant difference was observed for the results of two methods. K E Y W O R D Sfluorescent probe, methamidophos, molecular imprinting, quantum dot How to cite this article: Liu X, Liu Q, Kong F, Qiao X, Xu Z. Molecularly imprinted fluorescent probe based on hydrophobic CdSe/ZnS quantum dots for the detection of methamidophos in fruit and vegetables. Adv Polym

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Liquid chromatography–electrospray ionization tandem mass spectrometry and dynamic multiple reaction monitoring method for determining multiple pesticide residues in tomato

Cited by 82 publications

References 28 publications

Determination of pesticides residues in quinoa (Chenopodium quinoa Willd) using QuEChERS and LC-MS/MS

Determination of pesticides residues in quinoa (Chenopodium quinoa Willd) using QuEChERS and LC-MS/MS

Determination of Pesticides in Grape Juices by QuEChERS and Liquid Chromatography-Tandem Mass Spectrometry

Molecularly imprinted fluorescent probe based on hydrophobic CdSe/ZnS quantum dots for the detection of methamidophos in fruit and vegetables

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