Summary
A method for detection, quantification, and confirmation of 30 multi-class pesticide residues in fresh vegetables by gas chromatography-tandem mass spectrometry (GC-MS-MS) has been developed. The optimum ionization mode, electron impact (El-MS-MS) or chemical ionization (Cl-MS-MS), was used for different groups of pesticides in a single run. The residues were previously extracted from vegetables with dichloromethane. A 10μL aliquot of the extract can be injected in routine analysis without a clean up step when the glass liner is used with Carbofrit. Recovery efficiencies ranged 70–119% at the two different fortification levels studied and the relative standard deviation was <16.9% for all compounds. The limit of detection of each compound was 30 ng Kg−1−6 μg Kg−1. The proposed method was applied to the routine analysis of pesticides in vegetables grown in an important greenhouses area located in El Ejido (Almería, Spain).
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Martínez Vidal, J.L., Arrebola, F.J. & Mateu-Sánchez, M. Multi-residue method for determination of pesticides in vegetable samples by GC-MS-MS. Chromatographia 56, 475–481 (2002). https://doi.org/10.1007/BF02492012
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DOI: https://doi.org/10.1007/BF02492012