Abstract
Core-shell nanoparticles (NPs) of the type Fe3O4@SiO2 were prepared, coated with 3 different ionic liquids, and tested for their capability of extracting bisphenol A (BPA). The results showed BPA is best extracted by NPs of the type Fe3O4@SiO2@[OMIM] (where OMIM stands for 1-octyl-3-methylimidazole hexafluorophosphate). Following desorption with methanol, BPA was quantified by HPLC with fluorescence detection in the UV. The following figures of merit were found under optimal conditions: A linear range from 0.5 to 2.0 × 104 μg·L‾1, a detection limit of 90 ng·L‾1, a relative standard deviation of 1.2 % (for n = 3 and 10 μg·L‾1), and a pre-concentration factor of 25. The NPs can be re-used up to 10 times. The method was successfully applied to the determination of BPA in plastic tableware.
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The authors acknowledge the financial support from the National Natural Science Foundation of China (21375117) and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
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Chen, S., Chen, J. & Zhu, X. Solid phase extraction of bisphenol A using magnetic core-shell (Fe3O4@SiO2) nanoparticles coated with an ionic liquid, and its quantitation by HPLC. Microchim Acta 183, 1315–1321 (2016). https://doi.org/10.1007/s00604-016-1757-z
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DOI: https://doi.org/10.1007/s00604-016-1757-z