Application of matrix solid-phase dispersion to the determination of a new generation of fungicides in fruits and vegetables
2002; Elsevier BV; Volume: 968; Issue: 1-2 Linguagem: Inglês
10.1016/s0021-9673(02)00846-4
ISSN1873-3778
AutoresM. Navarro, Yolanda Picó, Raquel Marín, Jordí Mañes,
Tópico(s)Mycotoxins in Agriculture and Food
ResumoA method based on matrix solid-phase dispersion (MSPD) and gas chromatography to determine eight fungicides in fruits and vegetables is described. Fungicide residues were identified and quantified using nitrogen–phosphorus detection and electron-capture detection connected in parallel and confirmed by mass spectrometric detection. The method required 0.5 g of sample, C18 bonded silica as dispersant sorbent, silica as clean-up sorbent and ethyl acetate as eluting solvent. Recoveries from spiked orange, apple, tomato, artichoke, carrot and courgette samples ranged from 62 to 102% and relative standard deviations were less than 15% in the concentration range 0.05–10 mg kg−1. Detection and quantitation limits ranged 3–30 μg kg−1 and 10–100 μg kg−1, respectively, with linear calibration curves up to 10 mg kg−1. The analytical characteristics of MSPD compared very favourably with the results of a classical multiresidue method, which uses ethyl acetate and anhydrous sodium sulphate for the extraction.
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