eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2015-12-25 12 3 1999 2005 10.13005/bbra/1867 2217 article Diyanoosh Mardanbeigi 1 Mahmoud Ebrahimi 1 Mohammad Reza Bozorgmehr 1 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. https://www.biotech-asia.org/vol12no3/preconcentration-and-determination-of-organophosphorus-pesticides-in-water-samples-by-carbon-nanotube-reinforced-hollow-fiber-solidliquid-phase-microextraction-and-gas-chromatography-flame-ionization/ Pesticides; extracted; Preconcentration