title: Multiresidue determination of pesticides in lanolin using matrix solid-phase dispersion.
abstract: An efficient, fast, and accurate matrix solid-phase dispersion sample cleanup procedure was developed specifically for the determination of pesticide residues in lanolin. The scope of the method for organophosphorus, organochlorine, and pyrethroid insecticides is the same as that of official methods from various pharmacopeias. After lanolin dispersion on C18 bonded silica, pesticides are eluted with acetonitrile saturated with n-hexane. Recoveries ranged from 83 to 118% with RSD values of < 20% for most pesticides listed, in compliance with the requirements of European and U.S. pharmacopeias.
authors.affiliation: Farmacognosia y Productos Naturales, Facultad de Química, UdelaR Avda, General Flores 2124, 11800 Montevideo, Uruguay. aperez@fq.edu.uy
authors.forename: Andrés
authors.initials: A
authors.lastname: Pérez
authors.forename: Gabriel
authors.initials: G
authors.lastname: González
authors.forename: Joaquín
authors.initials: J
authors.lastname: González
authors.forename: Horacio
authors.initials: H
authors.lastname: Heinzen
mesh_terms: D000097:Acetonitriles / Q000032:analysis; D002849:Chromatography, Gas / Q000379:methods; D006586:Hexanes / Q000032:analysis; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D007306:Insecticides / Q000032:analysis; D007809:Lanolin / Q000032:analysis / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D010575:Pesticides / Q000737:chemistry*; D011722:Pyrethrins / Q000032:analysis; D015203:Reproducibility of Results; D012997:Solvents / Q000737:chemistry
chemical_list: D000097:Acetonitriles; D006586:Hexanes; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D010575:Pesticides; D011722:Pyrethrins; D012997:Solvents; D007809:Lanolin; C032159:acetonitrile