Multiresidue determination of pesticides in lanolin using matrix solid-phase dispersion.
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.
Pérez
Andrés
A
Farmacognosia y Productos Naturales, Facultad de Química, UdelaR Avda, General Flores 2124, 11800 Montevideo, Uruguay. aperez@fq.edu.uy
González
Gabriel
G
González
Joaquín
J
Heinzen
Horacio
H
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
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