Journal
MICROCHIMICA ACTA
Volume 186, Issue 2, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-018-3198-3
Keywords
Core-shell structured magnetic microspheres; Fe3O4@COFs; Bisphenols; 4-n-nonylphenol; 4-n-octylphenol; Absorption; Pretreatment; Determination; Optimization; Drink samples
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Funding
- National Natural Science Foundation of China [21777089]
- Natural Science Foundation of Shandong Province [ZR2018MB040]
- Key Research and Development Program of Shandong Province [2017GSF17107, 2018GSF117036]
- Shandong Provincial Key Laboratory of Test Technology for Material Chemical Safety [2018SDCLHX001]
- Shandong Province Taishan Scholar Program [ts201712063]
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A magnetic covalent organic framework (Fe3O4@COF) with core-shell structure was fabricated at room temperature and used as an adsorbent for magnetic solid-phase extraction of polar endocrine-disrupting phenols (4-n-nonylphenol, 4-n-octylphenol, bisphenol A and bisphenol AF). The sorbent was characterized by transmission electron microscopy, FTIR, powder X-ray diffraction and other techniques. The main parameters governing the extraction efficiency were optimized. The phenols were quantified by HPLC with fluorometric detection. The method has attractive features such as low limits of detection (0.08-0.21ng.mL(-1)), wide linear ranges (0.5-1000ng.mL(-1)), and good repeatability (intra-day: 0.39%-4.99%; inter-day: 1.57%-5.21%). Satisfactory results were obtained when the developed method was applied to determine the four target pollutants in real world drink samples with spiked recoveries over the range of 81.3118.0%. This indicates that the method is a powerful tool for the enrichment and determination of endocrine-disrupting phenols in drink samples.
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