期刊
MICROCHIMICA ACTA
卷 187, 期 1, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-019-4013-5
关键词
Magnetic hierarchical carbon nanorods; Magnetic solid-phase extraction; Benzoylurea insecticides; High performance liquid chromatography
资金
- National Natural Science Foundation of China [21575148, 21575149]
Magnetic hierarchical nickel/nickel oxide/carbon nanorods (Ni/NiO@C) were prepared via the pyrolysis of a metal-organic framework containing nickel(II) nickel (Ni-MOF; Ni-3(BTC)(2)) under argon atmosphere. In this material, magnetic Ni/NiO@C nanoparticles are embedded in porous carbon nanorods, and the morphology is similar to that of the original Ni-MOF precursor. The synthesized nanorods were applied as magnetic sorbents in the solid-phase extraction of five benzoylurea insecticides (flufenoxuron, chlorbenzuron, teflubenzuron, diflubenzuron and triflumuron), and their performance was evaluated under optimized conditions. The results show that the material exhibits high extraction recoveries from spiked samples (82.9%-107.6%) and linear response in the range of 0.2-450 mu g.L-1. It is also characterized by relatively low limits of detection (50-100 ng.mL(-1)) at a signal-to-noise ratio of 3. The sorbent is chemically stable and can be repeatedly recycled, with little decline in extraction capacity after 20 cycles of reuse. The method was successfully applied to the quantification of benzoylureas in tea, wolfberry, millet, and oat samples, and it showed high extraction efficiency.Schematic representation of the synthesis of magnetic hierarchical nickel/nickel oxide/carbon nanorods derived from Ni-MOF. The material is employed as a sorbent for the magnetic solid-phase extraction of benzoylurea insecticides.
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