期刊
TALANTA
卷 152, 期 -, 页码 321-328出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2016.02.005
关键词
Co-doped hierarchically porous carbon; Magnetic solid-phase extraction; Triazine herbicides; High performance liquid chromatography
资金
- National Natural Science Foundation of China [31471643, 31571925]
- Innovation Research Program of the Department of Education of Hebei for Hebei Provincial Universities [LJRC009]
- Natural Science Foundation of Agricultural University of Hebei [ZD201405]
A Co-doped hierarchically porous carbon (Co/HPC) was synthesized through a facile carbonization process by using Co/ZIF-8 as the precursor. The textures of the Co/HPC were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, vibration sample magnetometry and nitrogen adsorption-desorption isotherms. The results showed that the Co/HPC is in good polyhedral shape with uniform size, sufficient magnetism, high surface area as well as hierarchical pores (micro-, meso- and macropores). To evaluate the extraction performance of the Co/HPC, it was applied as a magnetic adsorbent for the enrichment of triazine herbicides from environment water and white gourd samples prior to high performance liquid chromatographic analysis. The main parameters that affected the extraction efficiency were investigated. Under the optimum conditions, a good linearity for the four triazine herbicides was achieved with the correlation coefficients (r) higher than 0.9970. The limits of detection, based on S/N=3, were 0.02 ng/mL for water and 0.1-0.2 ng/g for white gourd samples, respectively. The recoveries of all the analytes for the method fell in the range from 80.3% to 120.6%. (C) 2016 Elsevier B.V. All rights reserved.
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