title: MSPD sample preparation approach for reversed-phase liquid chromatographic analysis of pesticide residues in stem of coconut palm.
abstract: A method was developed using matrix solid-phase dispersion, together with liquid chromatography with ultraviolet diode array detector for determination of carbofuran, difenoconazole, β-cyfluthrin, spirodiclofen and thiophanate-methyl in stem of coconut palm. The best results were obtained using 2.0 g of stem, 1.6 g of Florisil as sorbent and cyclohexane:acetone mixture (4:1). The method was validated using stem samples spiked with pesticides at four concentration levels (0.05-2.0 μg/g). Average recoveries ranged from 70 % to 114.3 %, with relative standard deviations between 1.2 % and 19.2 %. Detection and quantification limits were in the ranges 0.02-0.03 and 0.05-0.1 μg/g, respectively.
authors.affiliation: Departamento de Química, Universidade Federal de Sergipe, Av. Marechal Rondon s/n, São Cristóvão, SE 49100-000, Brazil.
authors.forename: Jordana Alves
authors.initials: JA
authors.lastname: Ferreira
authors.forename: Luís Fabrício Santana
authors.initials: LF
authors.lastname: Santos
authors.forename: Nicaellen Roberta da Silva
authors.initials: NR
authors.lastname: Souza
authors.forename: Sandro
authors.initials: S
authors.lastname: Navickiene
authors.forename: Frederico Alberto
authors.initials: FA
authors.lastname: de Oliveira
authors.forename: Viviane
authors.initials: V
authors.lastname: Talamini
mesh_terms: D015107:4-Butyrolactone / Q000031:analogs & derivatives / Q000032:analysis; D000096:Acetone / Q000737:chemistry; D002235:Carbofuran / Q000032:analysis; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003059:Cocos / Q000737:chemistry*; D003510:Cyclohexanes / Q000737:chemistry; D004148:Dioxolanes / Q000032:analysis; D017633:Magnesium Silicates / Q000737:chemistry; D009570:Nitriles / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D018547:Plant Stems / Q000737:chemistry*; D011722:Pyrethrins / Q000032:analysis; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods*; D013141:Spiro Compounds / Q000032:analysis; D013875:Thiophanate / Q000032:analysis; D014230:Triazoles / Q000032:analysis
chemical_list: D003510:Cyclohexanes; D004148:Dioxolanes; D017633:Magnesium Silicates; D009570:Nitriles; D010573:Pesticide Residues; D011722:Pyrethrins; D013141:Spiro Compounds; D014230:Triazoles; C005013:Florisil; D000096:Acetone; C508135:spirodiclofen; C506365:Cyclohexane; D013875:Thiophanate; C115058:difenoconazole; D015107:4-Butyrolactone; C052570:cyfluthrin; D002235:Carbofuran