title: A comparison of a gas chromatographic with electron-capture detection and a gas chromatographic with mass spectrometric detection screening methods for the analysis of famoxadone in grapes and wines.
abstract: Famoxadone is a recent oxazolidinedione fungicide widely used in viticulture and in Integrated Pest Management strategies. In this work, after a simple and fast liquid-liquid extraction (LLE), two new gas chromatographic methods were developed to analyze famoxadone residues in grapes and wines, one with electron-capture detection (GC-ECD) and the other with mass spectrometry (GC-MS). Global uncertainties for validation parameters of both methods were compared. Limits of detection (LODs) were 0.06 and 0.02 mg/L, precision was not above 11.7 and 6.8% and recoveries were, on average, 103%+/-12 and 96%+/-12, respectively, for the GC-ECD and GC-MS methods. Similar expanded uncertainties in the range from 0.25 to 1.00 mg/L were below 35%, with increasing values for lower levels of famoxadone. GC-MS method had a lower LOD and a lower uncertainty if compared with the GC-ECD method.
authors.affiliation: LEPAE-DEQ, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
authors.forename: Susana
authors.initials: S
authors.lastname: de Melo Abreu
authors.forename: Pierluigi
authors.initials: P
authors.lastname: Caboni
authors.forename: Paolo
authors.initials: P
authors.lastname: Cabras
authors.forename: Arminda
authors.initials: A
authors.lastname: Alves
authors.forename: Vincenzo Luigi
authors.initials: VL
authors.lastname: Garau
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D004583:Electrons; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D008689:Methacrylates / Q000032:analysis; D010080:Oxazoles / Q000032:analysis*; D000073739:Strobilurins; D027843:Vitis / Q000737:chemistry*; D014920:Wine / Q000032:analysis*
chemical_list: D008689:Methacrylates; D010080:Oxazoles; D000073739:Strobilurins; C401929:famoxadone