Brunauer-emmett-teller surface areas Fourier transform infrared spectroscopy 2 Adsorption 1 Beverages 1 Chemicals removal (water treatment) 1 Chitosan 1 Chromatography 1 Composite 1 Composite materials 1 Esters 1 Extraction 1 Fe3O4 magnetic nanoparticles 1 Gas chromatography 1 Gas chromatography-flame ionization detectors 1 Gas generators 1 High resolution transmission electron microscopy 1 Individual components 1 Ionization of gases 1 Lead 1 Magnetic nano-particles 1 Magnetic nanoparti cles (MNPs) 1 Magnetic solid-phase extraction 1 Magnetic solid-phase extractions 1 Magnetic solidphase extraction (MSPE) 1 Magnetism 1 Nanomagnetics 1 Nanoparticles 1 Palygorskite 1 Palygorskites 1 Phase separation 1