Journal
MICROCHIMICA ACTA
Volume 183, Issue 4, Pages 1315-1321Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-016-1757-z
Keywords
Microextraction; Extraction kinetics; Magnetic nanomaterial; Magnetometry; FTIR; Fluorescnece; Quantumyield
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Funding
- National Natural Science Foundation of China [21375117]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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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 x 104 mu g center dot LaEuro3/4(1), a detection limit of 90 ng center dot LaEuro3/4(1), a relative standard deviation of 1.2 % (for n = 3 and 10 mu g center dot LaEuro3/4(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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