A polymeric magnetic adsorbent based on Fe3O4 nanoparticles and hypercrosslinked polystyrene for the preconcentration of tetracycline antibiotics

A magnetic adsorbent based on hypercrosslinked polystyrene (HCPS) and Fe3O4 nanoparticles (HCPS-Fe3O4) is synthesized and investigated. The conditions for its preparation are optimized by varying the weight of adsorbent and the concentration of Fe3O4. A comparative evaluation of the adsorption properties of HCPS-Fe3O4, HCPS, and Fe3O4 to tetracyclines is performed. It is shown that the magnetic adsorbent based on HCPS retains adsorptive properties towards tetracyclines and is easily separated from a solution by applying a magnetic field. The quantitative desorption of tetracyclines is achieved using 4 mL of an acetonitrile-methanol (1: 1) mixture.