期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1366, 期 -, 页码 45-53出版社
ELSEVIER
DOI: 10.1016/j.chroma.2014.08.077
关键词
Metal-organic frameworks (MOFs); Silica-UIO-66 composite; High performance chromatography (HPLC); Positional isomers; Fast separation
资金
- National Natural Science Foundation of China [21375018, 21275029]
- Five-twelfth National Science and Technology Support Program [2012BAD29B06]
- Natural Science Foundation of Fujian Province [2014J01402, 2010J05021]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1116]
A silica-UIO-66 composite was fabricated by a simple hydrothermal method and then applied as liquid chromatographic stationary phase for fast and efficient separation. X-ray diffraction patterns showed the presence of UIO-66 crystals in the silica-UIO-66 composites; while scanning electron microscope (SEM) images revealed that silica-UIO-66 composites were a homogeneous mixture of silica bead and UIO-66 crystals. A variety of substituted aromatics, chlorobenzene compounds and polycyclic aromatic hydrocarbons (PAHs) were used to evaluate the retention properties of the silica-UIO-66 composite packed column. Under the optimized conditions, baseline separation of ethylbenzene (EB) and styrene was obtained with high resolution and short retention time. In addition, the silica-UIO-66 composite packed column also showed some advantages in separation of positional isomers, with which baseline separation of EB and xylene, chlorotoluene and dichlorobenzene isomers was achieved. Moreover, the retention mechanisms of these compounds were also discussed in detail. The relative standard deviations (RSDs) for the separation of EB and xylene, chlorotoluene and dichlorobenzene isomers, as well as EB and styrene were 0.42-0.9%, 1.0-1.9%, 0.75-2.0%, and 0.9-2.1% for the retention time, peak area, peak height, and half peak width, respectively. The column efficiencies for EB, p-chlorotoluene, p-dichlorobenzene and styrene were 8780, 9060, 9990 and 5130 plates/m. The successful applications suggested high potentials of silica-MOFS composite as stationary phase for fast and efficient liquid chromatography separation. (C) 2014 Elsevier B.V. All rights reserved.
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