期刊
FOOD CHEMISTRY
卷 230, 期 -, 页码 154-163出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.03.012
关键词
Graphene/carbon nanotube composite; Pipette-tip solid-phase extraction; Liquid chromatography; Clenbuterol; Pork
资金
- Natural Science Foundation of Education Department of Hebei Province [ZD2015036, QN2016207]
- Natural Science Foundation of Hebei Province [B2015201132, B2015104013]
- Science and Technology Program of Hebei Province [15272804]
- Post-graduate's Innovation Fund Project of Hebei Province [S201718]
A fluffy porous ethylenediamine-connected graphene/carbon nanotube composite (EGC), prepared by a simple and time-saving one-pot synthesis, was successfully applied as an adsorbent in pipette-tip solid-phase extraction (PT-SPE) for the rapid extraction and determination of clenbuterol (CLB) from pork. In the one-pot synthesis, carbon nanotubes were inserted into graphene sheets and then connected with ethylenediamine through chemical modification to form a three-dimensional framework structure to prevent agglomeration of the graphene sheets. Under the optimum conditions for extraction and determination, good linearity was achieved for CLB in the range of 15.0-1000.0 ng g(-1) (r = 0.9998) and the recoveries at three spiked levels were in the range of 92.2-96.2% with relative standard deviation <9.2% (n = 3). In comparison with other adsorbents, including silica, NH2, C-18, and Al2O3, EGC showed higher extraction and purification efficiency for CLB from pork samples. This analytical method combines excellent adsorption performance of EGC and high extraction efficiency of PT-SPE. (C) 2017 Elsevier Ltd. All rights reserved.
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