期刊
JOURNAL OF SEPARATION SCIENCE
卷 40, 期 10, 页码 2207-2213出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201601355
关键词
high-performance liquid chromatography; magnetic solid-phase extraction; magnetic spherical carbon; phthalate esters
资金
- National Natural Science Foundation of China [31471643, 31571925, 31671930]
- Natural Science Foundation of Hebei Province [B2016204136, B2016204146, B2017204025]
- Hebei Double First Class Discipline Construction Foundation for the Discipline of Food Science and Engineering of Hebei Agricultural University [2016SPGCA18]
- Scientific and Technological Research Foundation of the Department of Education of Hebei Province [ZD2016085]
- Innovation Research Program of Yanshan University for Undergraduate Students [CXXL2016092]
- Natural Science Foundation of Agricultural University of Hebei [LG201607]
Magnetic spherical carbon was synthesized by a facile hydrothermal carbonization procedure with biomass glucose as the carbon precursor and nanoclusters iron colloid as magnetic precursor. The textures of the as-prepared magnetic spherical carbon were characterized by nitrogen adsorption-desorption isotherms, X-ray diffraction, transmission electron microscopy, scanning electron microscopy and vibration sample magnetometry. Results indicated that the magnetic spherical carbon possessed high surface area as well as strong magnetism, which endows the material with good adsorption capability and easy separation properties. To assess its absorption performance, the magnetic spherical carbon was employed as adsorbent for the extraction and preconcentration of phthalate esters from lake water and milk samples before high-performance liquid chromatographic analysis. Some key parameters that could influence the enrichment efficiency were investigated. Under the optimum conditions, a good linearity was achieved with the linear correlation coefficients higher than 0.9973. The limits of detection (S/N = 3) were 0.05-0.08 ng/mL for lake water and 0.1-0.2 ng/mL for milk samples. The recoveries of the analytes for the method were in the range 80.1-112.6%.
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