Validation and global uncertainty of a gas chromatographic with mass spectrometry method for fenamidone analysis in grapes and wines |
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Authors: | Susana de Melo Abreu Paulo Herbert Pierluigi Caboni Paolo Cabras Arminda Alves Vincenzo Luigi Garau |
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Affiliation: | 1. LEPAE-DEQ , Faculdade de Engenharia da Universidade do Porto , Porto, Portugal;2. Dipartimento di Tossicologia , Università di Cagliari , Cagliari, Italy |
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Abstract: | Fenamidone is an imidazolinone fungicide recently introduced in viticulture practices. This work reports the validation and assessment of global uncertainty of a gas chromatographic with mass spectrometry method to analyze fenamidone in grapes and wines. This method consists in a simple and fast liquid-liquid extraction step followed by chromatographic determination. Limits of detection for fenamidone in grapes and wines were, respectively, 0.05 mg/kg and 0.06 mg/L, precision was below 9.4% and average recovery was 89 ± 5%. In the concentration range from 0.05 to 1.00 mg/kg (or mg/L) of fenamidone, global uncertainty calculated following the EURACHEM/CITAC rules, and also by the Horwitz function, was below 25%. The EURACHEM/CITAC global uncertainty budget used gave lower estimates than those obtained from the Horwitz function. |
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Keywords: | Fenamidone residues Fungicide Grapes Wines Gas chromatography with mass spectrometry Method validation Global uncertainty |
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