Ultrahigh performance liquid chromatographic analysis and magnetic preconcentration of polycyclic aromatic hydrocarbons by Fe3O4-doped polymeric nanoparticles

Magnetic adsorption separation (MAS) process: An alternative method of extracting Cr(VI) from aqueous solution using polypyrrole coated Fe 3 O 4 nanocomposites

“…The absence of hysteresis loops, remanence magnetism and coercivity as shown in the plots, for all the three NCs, confirmed that the NCs exhibited super-paramagnetic behaviour [9]. This serves to confirm that all the as-synthesised NCs met the minimum criterion for successful magnetic separation of a material from a solution by use of conventional methods which requires a material to possess M s values higher than 16 emu/g [43]. These findings suggested that the magnetic behaviour of the NCs depends on Fe 3 O 4 nanoparticles loadings.…”

Nano polypyrrole-coated magnetic solid phase extraction followed by dispersive liquid phase microextraction for trace determination of megestrol acetate and levonorgestrel

“…According to reports available, surface modification stabilizes the NPs and prevents their oxidation [9][10][11][12][13]. Also, suitable surface modification increases their dispersibility and extraction capacity as well as their selectivity [14][15][16].…”

Recent Advances in the Extraction of Polycyclic Aromatic Hydrocarbons from Environmental Samples

“…Heavy PAHs are more stable and more toxic than the light PAHs. These chemical compounds are widespread environmental contaminants that are considered byproducts of the incomplete combustion of organic materials, such as coal, gas, garbage, meat, oil, tobacco and wood, during natural or anthropogenic processes [1,3]. PAHs are toxic substances, which are resistant to degradation and exposure to them may increase the risk of cancer [4].…”

“…Currently, the most widely used methods for analyzing these pollutants in environmental matrices are gas chromatography (GC), high performance liquid chromatography (HPLC) and ultra-high pressure liquid chromatography (UHPLC) [3,5]. Various detection systems, including ultraviolet detectors (UV) [6], diode array detectors (DAD) [3], fluorescence detectors (FLD) [1], mass detectors (MS) coupled with HPLC and UHPLC and flame ionization detectors (FID) [7], MS detectors [5] and tandem MS detectors (MS/MS) [8] coupled with GC have been used. Due to the enhanced sensitivity in the determination of PAHs that results in lower LODs, mass detectors and tandem MS detectors are generally preferred.…”