title: Application of the molecularly imprinted solid-phase extraction to the organophosphate residues determination in strawberries.
abstract: This study describe an analytical method employing gas chromatography (GC) using flame photometric detection that has been developed for the simultaneous determination of organophosphate pesticides (diazinon, disulfoton, parathion, chlorpyrifos and malathion) in strawberry samples. For this purpose, molecularly imprinted solid-phase extraction was applied as a sample preparation technique. The method was linear in the ranges from 0.10 to 1.00 μg g(-1), for diazinon, disulfoton, parathion and chlorpyrifos, and 0.10 to 2.00 μg g(-1) for malathion with r > 0.99. The detection limits (LD) ranged from 0.02 to 0.05 μg g(-1). Recovery studies yielded average recoveries in the range of 65.25 to 87.70 %. These results showed the potential of this technique for organophosphate residue monitoring in strawberry samples.
authors.affiliation: Laboratory of Toxicants and Drug Analysis-LATF, Faculty of Pharmaceutical Sciences, Federal University of Alfenas-Unifal-MG, Alfenas, Minas Gerais, Brazil.
authors.forename: Isabela Mendes
authors.initials: IM
authors.lastname: Baldim
authors.forename: Marília Cristina de Oliveira
authors.initials: MC
authors.lastname: Souza
authors.forename: João Carlos Jacinto da Cunha
authors.initials: JC
authors.lastname: Souza
authors.forename: Eduardo Costa
authors.initials: EC
authors.lastname: Figueiredo
authors.forename: Isarita
authors.initials: I
authors.lastname: Martins
mesh_terms: D000327:Adsorption; D002849:Chromatography, Gas / Q000379:methods; D005506:Food Contamination / Q000032:analysis; D031985:Fragaria / Q000737:chemistry*; D054802:Molecular Imprinting; D009946:Organothiophosphorus Compounds / Q000032:analysis / Q000302:isolation & purification*; D010573:Pesticide Residues / Q000032:analysis / Q000302:isolation & purification*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*
chemical_list: D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues; D011108:Polymers