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Silica supported Fe3O4 magnetic nanoparticles for magnetic solid-phase extraction and magnetic in-tube solid-phase microextraction: application to organophosphorous compounds |
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| Authors: | Y Moliner-Martinez Yosmery Vitta Helena Prima-Garcia R A González-Fuenzalida Antonio Ribera P Campíns-Falcó Eugenio Coronado |
| Institution: | 1. Departamento de Química Analítica, Facultad de Química, Universidad de Valencia, Dr. Moliner 50, 46100, Burjassot, Valencia, Spain 2. School of Chemistry, Faculty of Science, Central University of Venezuela Paseo los Ilustres, Urb. Valle Abajo, 20513, Carracas, Venezuela 3. Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain |
| Abstract: | This work demonstrates the application of silica supported Fe3O4 nanoparticles as sorbent phase for magnetic solid-phase extraction (MSPE) and magnetic on-line in-tube solid-phase microextraction (Magnetic-IT-SPME) combined with capillary liquid chromatography–diode array detection (CapLC-DAD) to determine organophosphorous compounds (OPs) at trace level. In MSPE, magnetism is used as separation tool while in Magnetic-IT-SPME, the application of an external magnetic field gave rise to a significant improvement of the adsorption of OPs on the sorbent phase. Extraction efficiency, analysis time, reproducibility and sensitivity have been compared. This work showed that Magnetic-IT-SPME can be extended to OPs with successful results in terms of simplicity, speed, extraction efficiency and limit of detection. Finally, wastewater samples were analysed to determine OPs at nanograms per litre. |
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