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Matrix‐Matching as an Improvement Strategy for the Detection of Pesticide Residues
Author(s) -
Giacinti Géraldine,
Raynaud Christine,
Capblancq Sophie,
Simon Valérie
Publication year - 2016
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.13296
Subject(s) - pesticide residue , pesticide , chemistry , captan , fludioxonil , flesh , matrix (chemical analysis) , chromatography , quechers , detection limit , residue (chemistry) , ion suppression in liquid chromatography–mass spectrometry , maximum residue limit , mass spectrometry , food science , tandem mass spectrometry , agronomy , biology , biochemistry
Abstract More than 90% of the pesticides residues in apples are located in the peel. We developed a gas chromatography/ion trap tandem mass spectrometry method for investigating all detectable residues in the peel of 3 apple varieties. Sample preparation is based on the use of the Quick Easy Cheap Effective Rugged and Safe method on the whole fruit, the flesh, and the peel. Pesticide residues were quantified with solvent‐matched and matrix‐matched standards, by spiking apple sample extracts. Matrix effects dependent on the type of extract (fruit, flesh, or peel) and the apple variety were detected. The best data processing methods involved normalizing matrix effect rates by matrix‐matched internal/external calibration. Boscalid, captan, chlorpyrifos, fludioxonil, and pyraclostrobin were the most frequently detected pesticides. However, their concentrations in the whole fruit were below European maximum residue levels. Despite negative matrix effects, the residues in peel were detected at concentrations up to 10 times higher than those in whole fruits. Consequently, other pesticide residues present at concentrations below the limit of quantification in the whole fruit were detected in the peel.