n the present work, a simple and effective method based on magnetic separation has been developedfor the extraction of monocyclic aromatic amines in water and urine samples using poly(para-phenylenediamine) modified with Fe3O4nanoparticles (PpPD/Fe3O4) as an adsorbent. The chemicalstructures of the sorbent were characterized by field emission scanning electron microscopy (FESEM)and Fourier transform infrared spectrophotometer (FT-IR). Various parameters affecting on the extrac-tion efficiency of desired analytes, such as pH of solution, desorption conditions, extraction time, salteffect and amount of adsorbent have been investigated and optimized. The obtained optimal conditionswere: sample pH, 6; amount of sorbent, 20 mg; sorption time, 2 min; elution solvent and its volume,dichloromethane and chloroform (3:1 v/v), 250 L; elution time, 30 s and without addition of NaCl.Under the optimum conditions, detection limits in the range of 0.007–0.01 ng mL–1were obtained bygas chromatography–flame ionization detector (GC–FID). The calibration curves were linear in the range0.05–100 ng mL–1with a correlation coefficient better than 0.9953. In addition, a satisfactory reproducibil-ity was achieved by evaluating the intra- and inter-day precisions with relative standard deviations (RSDs)less than 5.9 and 7.3%, respectively. The proposed procedure has been successfully applied to the deter-mination of target analytes in water and urine samples. The results demonstrated that the developedmethod is simple, inexpensive, accurate and remarkably free from interference effects.

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