Comparison of QuEChERS sample preparation methods for the analysis of pesticide residues in canned and fresh peach

Original, citrate and acetate QuEChERS methods were studied in order to evaluate the extraction efficiency and the matrix effect in the extraction of pesticides from canned peach samples. Determinations were performed by gas chromatography coupled to mass spectrometry (GC-MS). The proposed method wi...

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Published in:Food chemistry 2014-12, Vol.165, p.587-593
Main Authors: COSTA, Fabiane Pinho, CALDAS, Sergiane Souza, PRIMEL, Ednei Gilberto
Format: Article
Language:English
Subjects:
Biological and medical sciences
Food Contamination - analysis
Food Preservation
Food toxicology
Gas Chromatography-Mass Spectrometry
Medical sciences
Pesticide Residues - analysis
Pesticides - analysis
Pesticides, fertilizers and other agrochemicals toxicology
Prunus - chemistry
Reproducibility of Results
Toxicology
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description Original, citrate and acetate QuEChERS methods were studied in order to evaluate the extraction efficiency and the matrix effect in the extraction of pesticides from canned peach samples. Determinations were performed by gas chromatography coupled to mass spectrometry (GC-MS). The proposed method with extraction using the original QuEChERS method and determination by GC-MS was validated. LOQs ranged between 1 and 10 μg kg(-1) and all analytical curves showed r values higher than 0.99. Recovery values varied from 69% to 125% with RSDs less than 20%. The matrix effect was evaluated and most compounds showed signal enrichment. Robustness was demonstrated using fresh peaches, which provided recovery values within acceptable limits. The applicability of the method was verified and residues of tebuconazole and dimethoate were found in the samples.
doi_str_mv 10.1016/j.foodchem.2014.05.099
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subjects Biological and medical sciences
Food Contamination - analysis
Food Preservation
Food toxicology
Gas Chromatography-Mass Spectrometry
Medical sciences
Pesticide Residues - analysis
Pesticides - analysis
Pesticides, fertilizers and other agrochemicals toxicology
Prunus - chemistry
Reproducibility of Results
Toxicology
title Comparison of QuEChERS sample preparation methods for the analysis of pesticide residues in canned and fresh peach
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