Simple magnetization of Fe3 O4 /MIL-53(Al)-NH2 for a rapid vortex-assisted dispersive magnetic solid-phase extraction of phenol residues in water samples.

The present work describes a simple route to magnetize MIL-53(Al)-NH2 sorbent for rapid extraction of phenol residues from environmental samples. To extend the applications and performances of the metal-organic frameworks in the field of adsorption materials, we combined the properties of metal-organic frameworks and magnetite to decrease the extraction time and simplify the extraction process as well. In this study, a simple and quick vortex-assisted dispersive magnetic solid phase extraction method for the extraction of ten United States Environmental Protection Agency's priority phenols from water samples prior to analysis by high-performance liquid chromatography with photodiode array detection was proposed. The developed method exhibits a rapid enrichment of the target analytes within 10 s for extraction and 10 s for desorption. Low detection limits of 1.8-41.7 µg/L and quantitation limits of 6.0-139.0 µg/L with the relative standard deviations for intra- and interday analyses less than 12% were achieved. Satisfactory recoveries in the range of 80-111% with the relative standard deviations less than 11% demonstrated that Fe3 O4 /MIL-53(Al)-NH2 is promising sorbent in the field of magnetic solid-phase extraction for environmental samples.