Preconcentration and Determination of Organophosphorus Pesticides in Water Samples by Carbon Nanotube Reinforced Hollow Fiber Solid/Liquid Phase Microextraction and Gas Chromatography-Flame Ionization Detector

Diyanoosh Mardanbeigi,  Mahmoud Ebrahimi*, Mohammad Reza Bozorgmehr

Department of Chemistry, Mashhad Branch, Islamic Azad University Mashhad, Iran.

DOI : http://dx.doi.org/10.13005/bbra/1867

ABSTRACT: Pesticides were extracted from the sample to the organic solvent immobilized in the fibre and they were desorbed in methanol prior to chromatographic analysis. Experimental parameters related to microextraction such as type of extraction time , organic solvent and agitation rate have been optimized. The extraction method has been validated for several types of real samples, and no matrix effect was observed. The technique requires minimal sample handling and solvent consumption. Using optimum conditions, low detection limits (0.03–3.91µgL⁻¹) and good linearity (R2 > 0.96) were obtained. Repeatability ranged from 3.1 to 11.1%. Finally The obtained results indicated that the method can be successfully applied for microextraction and determination of pesticides in environmental samples.

KEYWORDS: Pesticides; extracted; Preconcentration

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