Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1605, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2019.460364
Keywords
Ni-MOF; Magnetic Ni-C microspheres; Adsorbent; Phthalate esters
Funding
- Natural Science Foundation of Hebei Province [B2017204025, B2016204136, B2016204146]
- National Natural Science Foundation of China [31571925, 31671930]
- Scientific and Technological Research Foundation of the Department of Education of Hebei Province [ZD2016085]
- Hebei Double First Class Discipline Construction Foundation for the Discipline of Food Science and Engineering of Hebei Agricultural University [2016SPGCA18]
- Natural Science Foundation of Hebei Agricultural University [LG201607, LG201610]
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In this work, magnetic Ni doped nanoporous carbon (Ni-C) microspheres were prepared by directly calcinating Ni based metal-organic framework at 400 degrees C in nitrogen. The morphology and surface area of Ni-C microspheres were characterized by electron microscopy and N-2 adsorption-desorption isotherms. The results demonstrated that Ni nanoparticles were wrapped by the carbon matrix, resulting in the Ni-C microspheres with a strong magnetic response. The Ni-C microspheres also showed high surface area and micro/meso-porous structure, which make them efficient and recyclable magnetic adsorbent. The Ni-C microspheres were employed for magnetic solid phase extraction of phthalate esters from juice and water samples before high performance liquid chromatographic analysis. The limits of detection (S/N = 3) of the method were 0.2-0.3 ng mL(-1) for juice sample and 0.02-0.03 ng mL(-1) for water sample. The recoveries of all analytes were between 90.0%-100.6%. The Ni-C microspheres showed a great deal of potential to be an adsorbent for enrichment of other organic pollutants in different samples. (C) 2019 Elsevier B.V. All rights reserved.
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