Journal
FOOD CHEMISTRY
Volume 277, Issue -, Pages 579-585Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.11.021
Keywords
Fe3O4@graphitic carbon submicrocubes; Waste napkins; Magnetic dispersive solid-phase extraction; Phthalate esters
Funding
- National Nature Science Foundation of China [NSFC 51672116, 21707061]
- Research Fund for the Doctor Program of Liaoning Province [20180540060]
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A well-designed core-shelled Fe3O4@graphitic carbon (Fe3O4@GC) submicrocube was in situ constructed in a simple, relatively green and eco-friendly ways basing on one-step pyrolysis of low-cost waste napkins-coated Fe2O3 submicrocubes. The Fe3O4@GC submicrocubes showed unique architectures where in situ generated thin graphitic carbon layer wrapped on the surface of Fe3O4, resulting in excellent affinity to five phthalate esters (PAEs), good reusability and rapid magnetic separation, therefore were employed as magnetic dispersive solid-phase extraction material combined with HPLC to simultaneously detect five trace PAEs in beverages and plastic bottles. Under optimized conditions, recoveries (80.0%-112.8%), precision (RSDs <= 8.8%), and limits of detection (LODs) for beverages (0.09-0.28 mu g L-1) and plastic bottles (0.01-0.03 mu g g(-1)) were obtained. This work not only establishes an effective method for simultaneous determination of five PAEs, but also opens up a new strategy to design/construct magnetic graphitic carbon-encapsulated core-shell materials using low-cost/recyclable napkins as carbon source.
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