Journal
FOODS
Volume 10, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/foods10020307
Keywords
pesticide metabolites; pesticide residues; grapes; wines; organic farming; targeted screening; UHPLC-(HR)MS/MS
Categories
Funding
- METROFOOD-CZ research infrastructure project (MEYS) [LM2018100]
- Operational Programme PragueCompetitiveness [CZ.2.16/3.1.00/21537, CZ.2.16/3.1.00/24503]
- National Programme of Sustainability I-NPU I [LO1601]
- EU-China-Safe Horizon 2020 Project [727864]
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This study investigated pesticide residues and metabolites in grapes and wines, using advanced analytical methods to detect multiple residues in samples. The most commonly detected residues were fungicides and insecticides. A targeted screening strategy for pesticide metabolites was applied for authentication of organic grapes and wines, with many samples found to have no quantifiable residues or contained residues approved for organic production.
In this study, the occurrence of pesticide residues and their metabolites in grapes and wines was investigated. A targeted analysis of 406 pesticide residues in 49 wine and grape samples from organic and conventional production were performed using the QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) extraction method, followed by ultra-high-performance liquid chromatography coupled with tandem mass spectrometry. Multiple residues (>4 residues/sample) were detected in 22 tested samples. The most commonly detected residues were fungicides (e.g., boscalid) and insecticides (e.g., methoxyfenozide). An ultra-high-performance liquid chromatography-high resolution mass spectrometry method (UHPLC-(HR)MS) was used for screening of pesticide metabolites. We also provide a method and database for detecting pesticide metabolites (extending our previously published database to 49 metabolites originating from 25 pesticides). An introduced strategy of targeted screening of pesticide metabolites was applied for authentication of 27 organic grapes and wines. In total, 23 samples were free of quantifiable residues/detected metabolites or contained residues approved for organic production.
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