کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1199131 1493560 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and evaluation of silica-UIO-66 composite as liquid chromatographic stationary phase for fast and efficient separation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Preparation and evaluation of silica-UIO-66 composite as liquid chromatographic stationary phase for fast and efficient separation
چکیده انگلیسی


• A novel silica-UIO-66 composite was synthesized for liquid chromatographic stationary phase.
• Fast separation of ethylbenzene and styrene was achieved with the packed column.
• Baseline separation of positional isomers was achieved with the packed column.

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1366, 31 October 2014, Pages 45–53
نویسندگان
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