Development of QuEChERS-based multiresidue analytical methods to determine pesticides in corn, grapes and alfalfa
| Autor: | Manuel García-Vara, Cristina Postigo, Patricia Palma, Miren López de Alda |
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| Přispěvatelé: | Ministerio de Ciencia e Innovación (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Popis: | Analytical methods based on QuEChERS and liquid chromatography-tandem mass spectrometry were developed for the determination of 42 polar and semi-polar pesticides in three representative vegetable matrices, viz. corn, grapes and alfalfa. A 26-2 fractional factorial experimental design was used to cost-effectively optimize the extraction procedure. The optimal analytical approaches were validated in terms of linearity, sensitivity, trueness, and precision. Most of the target pesticides showed a relative recovery of 70-120 %. Moreover, limits of detection (between 0.01 ng/g and 20 ng/g) were below the maximum residue levels set for the target analytes in nearly all cases. Analysis of real samples showed the presence of five pesticides in grapes and alfalfa at concentrations between the method LOQs and 40 ng/g. To the authors' knowledge, these methods are the first ever described for the determination of 6, 13 and 24 of the 42 target pesticides measured in corn, grapes and alfalfa, respectively. This work has been funded by the European Union through the European Agricultural Fund for Rural Development (FitoFarmGest Operational Group PDR2020-101-030926), the Spanish Ministry of Science and Innovation (grant CEX2018-00794-S, funded by MCIN//AEI/ 10.13039/501100011033) and the Government of Catalonia (2017 SGR 01404). BEKOlut is acknowledged for the gift of QuEChERS kits. |
| Databáze: | OpenAIRE |
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