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Suitability of Microwave-assisted Extraction Coupled with Solid-phase Extraction for Organophosphorus Pesticide Determination in Olive Oil by Edwar Fuentes; María E. Báez; Adalí Quiñones is a Chemistry article available to read on EtoBox.

What is Suitability of Microwave-assisted Extraction Coupled with Solid-phase Extraction for Organophosphorus Pesticide Determination in Olive Oil about?

A systematic study of the microwave-assisted extraction coupled to solid-phase extraction of nine organophosphorus pesticides (dimethoate, diazinon, pirimiphos methyl, parathion methyl, malathion, fenthion, chlorpyriphos, methidathion and azinphos methyl) from olive oil is described. The method is based on microwave-assisted liquid-liquid extraction with partition of organophosphorus pesticides between an acetonitrile-dichloromethane mixture and oil. Cleanup of extracts was performed with ENVI-Carb solid-phase extraction cartridge using dichloromethane as the elution solvent. The determination of pesticides in the final extracts was carried out by gas chromatography-flame photometric detection and gas chromatography-tandem mass spectrometry, using a triple quadrupole mass analyzer, for confirmative purposes. The study and optimization of the method was achieved through experimental design where recovery of compounds using acetonitrile for partition ranged from 62 to 99%. By adding dichloromethane to the extracting solution, the recoveries of more hydrophobic compounds were significantly increased. Under optimized conditions recoveries of pesticides from oil were equal to or higher

Who reads Suitability of Microwave-assisted Extraction Coupled with Solid-phase Extraction for Organophosphorus Pesticide Determination in Olive Oil?

Author

Edwar Fuentes; María E. Báez; Adalí Quiñones

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2008

Language

EN

Field

Chemistry (Physical Sciences)