fabrication of graphene/Fe3O4@polythiophene nanocomposite and its application in the magnetic solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples

Polythiophene (PT) was used as a modifier of graphene/Fe3O4 (G/Fe3O4) to increase excellent merit of it, andalso overcome some disadvantages of using G and G/Fe3O4 as solid phase extraction (SPE) sorbents. The application ofthis newly designed material in the magnetic SPE (MSPE) of polycyclic aromatic hydrocarbons (PAHs), as modelanalytes, in the environmental water was investigated. The identity of the hybrid material was confirmed usingtransmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray analysis, Fourier transforminfrared(FT-IR) spectroscopy and vibrating sample magnetometry. Seven important parameters, affecting the extractionefficiency (amount of adsorbent, adsorption and desorption times, type and volume of the eluent solvent, sample volumeand salt addition effects) were evaluated. Good performance data were obtained at the optimized conditions. Detectionlimits were in the range of 0.007–0.019 μg L−1. The calibration curves were linear over the concentration ranges from 0.023 to 100 μg L−1 with correlation coefficients (R2) between 0.993-0.999. Relative standard deviations were ranged from4.3 to 6.2%. Appropriate recovery values, in the range of 83– 107%, were also obtained in the real sample analysis.

کلیدواژه ها:

Graphene/Fe3O4@Polythiophene ، Magnetic solid phase extraction ، Nanocamposite ، polycyclic aromatichydrocarbons ، seawater