title: Determination of pesticides in edible oils by liquid chromatography-tandem mass spectrometry employing new generation materials for dispersive solid phase extraction clean-up.
abstract: The goal of this work was to evaluate the efficiency of several sorbents on removal fats from edible oils (olive, soya and sunflower) during the clean-up step for posterior determination of 165 pesticides by UHPLC-QqQ-MS/MS system. The extraction procedure employed in this work was the citrate version of QuEChERS method followed by a step of freezing out with dry ice and clean-up evaluation using i) PSA with magnesium sulfate (d-SPE); ii) magnesium sulfate and Z-sep sorbent (d-SPE); iii) Z-sep (column SPE) and iv) Agilent Bond Elut QuEChERS Enhanced Matrix Removal-Lipid (EMR-Lipid). After evaluation of the recovery results at 10, 20 and 50μgkg(-1), the EMR-Lipid showed important advantages comparing to the other sorbents evaluated, such as better recovery rates and RSD%. The method was validated at the three concentrations described above. Analytical curves linearity was evaluated by spiking blank oil samples at 10, 20, 50, 100 and 500μgkg(-1). The method demonstrated good recoveries values between the acceptable range of 70-120% and RSD%<20 for most of evaluated pesticides. In order to evaluate the performance of the method, this same procedure was employed to other oils such as soya and sunflower with very good results.
authors: Federal University of Santa Maria (UFSM), Chemistry Department, Center of Research and Analysis of Residues and Contaminants (CEPARC), 97105-900, Santa Maria, RS, Brazil.
authors: Jonatan V
authors: JV
authors: Dias
authors: European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables (EURL-FV), University of Almeria, Agrifood Campus of International Excellence (ceiA3), Almeria, Spain.
authors: Victor
authors: V
authors: Cutillas
authors: European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables (EURL-FV), University of Almeria, Agrifood Campus of International Excellence (ceiA3), Almeria, Spain.
authors: Ana
authors: A
authors: Lozano
authors: Federal University of Santa Maria (UFSM), Chemistry Department, Center of Research and Analysis of Residues and Contaminants (CEPARC), 97105-900, Santa Maria, RS, Brazil.
authors: Ionara R
authors: IR
authors: Pizzutti
authors: European Union Reference Laboratory for Pesticide Residues in Fruit & Vegetables (EURL-FV), University of Almeria, Agrifood Campus of International Excellence (ceiA3), Almeria, Spain. Electronic address: amadeo@ual.es.
authors: Amadeo R
authors: AR
authors: Fernández-Alba
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004041:Dietary Fats / Q000032:analysis; D008278:Magnesium Sulfate; D010573:Pesticide Residues / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D053719:Tandem Mass Spectrometry
chemical_list: D004041:Dietary Fats; D010573:Pesticide Residues; D010575:Pesticides; D010938:Plant Oils; D008278:Magnesium Sulfate
keywords: Edible oils; Multi-residue method; Pesticides; UHPLC–MS/MS