期刊
JOURNAL OF SEPARATION SCIENCE
卷 38, 期 22, 页码 3928-3935出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201500690
关键词
High-performance liquid chromatography; Metal-organic frameworks; Phthalate estersm; Porous carbon; Solid-phase extraction
资金
- National Natural Science Foundation of China [31171698, 31471643]
- Innovation Research Program of the Department of Education of Hebei for Hebei Provincial Universities [LJRC009]
- Scientific and Technological Research Foundation of Department of Education of Hebei Province [ZD20131033]
- Natural Science Foundations of Hebei [B2012204028]
A porous carbon designated as MOF-5-C was prepared by directly carbonizing a metal-organic framework (MOF-5). The morphology and microstructure of MOF-5-C were characterized by scanning electron microscopy, N-2 adsorption, and powder X-ray diffraction. The MOF-5-C retained the original porous structures of MOF-5, and showed a high Brunauer-Emmett-Teller surface area (1808 m(2) g(-1)) and large pore volume (3.05 cm(3) g(-1)). To evaluate its adsorption performance, the MOF-5-C was used as an adsorbent for the solid-phase extraction of four phthalate esters from bottled water, peach juice, and soft drink samples followed by high-performance liquid chromatographic analysis. Several parameters that could affect the extraction efficiencies were investigated. Under the optimum conditions, a good linearity was achieved in the concentration range of 0.1-50.0 ng mL(-1) for bottled water sample and 0.2-50.0 ng mL(-1) for peach juice and soft drink samples. The limits of detection of the method (S/N = 3) were 0.02 ng mL(-1) for bottled water sample, and 0.04-0.05 ng mL(-1) for peach juice and soft drink samples. The results indicated that the MOF-5-C exhibited an excellent adsorption capability for trace levels of phthalate esters, and it could be a promising adsorbent for the preconcentration of other organic compounds.
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