Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1422, Issue -, Pages 53-59Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2015.10.035
Keywords
Graphene; Carbon nanotube; Magnetic dispersive solid-phase extraction; Oxytetracycline; Sewage water
Funding
- National Natural Science Foundation of China [31301464, 21575033]
- Natural Science Foundation of Hebei Province [B2015201132, B2015104013, B2014201089]
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A simple and time-saving one pot synthesis of magnetic graphene/carbon nanotube composites (M-G/CNTs) was developed that could avoid the tedious drying process of graphite oxide, and G/CNTs were modified by Fe3O4 nanoparticles in the reduction procedure. It contributed to a shorten duration of the synthesis process of M-G/CNTs. The obtained M-G/CNTs were characterized and the results indicated that CNTs and Fe3O4 nanoparticles were served as spacer distributing to the layers of graphene, which was beneficial for enlarging surface area and improving extraction efficiency. Moreover, M-G/CNTs showed good magnetic property and outstanding thermal stability. Then M-G/CNTs were applied as adsorbent of magnetic dispersive solid-phase extraction for rapid extraction and determination of oxytetracycline in sewage water. Under the optimum conditions, good linearity was obtained in the range of 20-800 ng mL(-1) and the recoveries were ranged from 95.5% to 112.5% with relative standard deviations less than 5.8%. (C) 2015 Elsevier B.V. All rights reserved.
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