title: LC-ESI-MS/MS determination of phenylurea and triazine herbicides and their dealkylated degradation products in oysters.
abstract: A method was developed for the determination of several phenylurea and triazine herbicides and their transformation products in oysters at the low microg/kg level. Pressurised liquid extraction (PLE) of lyophilisated samples had required successive SPE combined with a liquid/liquid extraction to provide relatively clean extracts for the determination in LC-MS/MS. This procedure was validated according to the 2002/657/EC analytical decision. Efficiency of the analytical method led to confirmatory CCalpha values ranging from 0.1 to 14 microg/kg with an R.S.D. value ranging from 14% to 66% and a recovery yield ranging from 32% to 46% for phenylureas and from 29% to 75% for triazines.
authors.affiliation: LABERCA-LABoratoire d'Etude des Résidus et Contaminants dans les Aliments, Ecole Nationale Vétérinaire de Nantes, route de Gachet, BP 50707, 44307 Nantes cedex 3, France. laberca@vet-nantes.fr
authors.forename: E
authors.initials: E
authors.lastname: Bichon
authors.forename: M
authors.initials: M
authors.lastname: Dupuis
authors.forename: B
authors.initials: B
authors.lastname: Le Bizec
authors.forename: F
authors.initials: F
authors.lastname: André
mesh_terms: D000818:Animals; D002853:Chromatography, Liquid / Q000379:methods*; D006540:Herbicides / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D010125:Ostreidae / Q000737:chemistry*; D010671:Phenylurea Compounds / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D014227:Triazines / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D006540:Herbicides; D010671:Phenylurea Compounds; D014227:Triazines