欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
将硅酸乙酯、过硫酸钾、盐酸、甲基丙烯酸钠共混,在一定条件下水解、聚合,经真空处理后,分散至石蜡油中,控制反应温度进行溶胶-凝胶化转变,合成了灌流硅胶微球材料。采用扫描电镜仪、比表面孔径测试仪、压汞仪等对其进行了表征,发现该微球材料具有多级孔结构,即纳米尺度的中孔和微米尺度的穿透孔。中孔能够提供大的比表面,而穿透孔有利于流动相通过,实现对流传质。该材料经十八烷基三乙氧基硅烷改性后,成功应用于苯同系物的高效快速分离。
英文摘要：
The synthesis of a new liquid chromatographic packing of perforative silica gel microspheres was reported. The tetraethoxylsilane, potassium persulfate, hydrochloric acid and methacrylate sodium were mixed together at 60 ℃ for 4 h. Then the solution was connected to a vacuum pump for 4 h to get rid of by-product of ethanol. After that, it was magnetically dispersed into paraffin oil to undergo sol-gel transition. The as-synthesized silica gel was characterized by scanning electron microscopy, mercury porosimetry and nitrogen sorption measurements. The results shows that the silica gel demonstrates hierarchically porous structure of mesopores and perfusive macropores. The mesopores guarantee high surface area while the macropores, which traverse the microspheres, realize convective mass transfer. The successful application of the perforative silica gel in fast liquid chromatography was well demonstrated in the present work. Five benzene homologues can be baseline separated within 3 min.
同期刊论文项目
同项目期刊论文
Humic acid-bonded silica as a novel sorbent for solid-phase extraction of benzo[a]pyrene in edible o
Profiling of Permeable Compounds in Ligusticum chuanxiong by Biopartitioning Micellar Chromatography
Determination of sexual hormones in liquid cosmetics by polymer monolith microextraction coupled wit
Multiresidue analysis of beta-agonists in pork by coupling polymer monolith microextraction to elect
Preparation of organic-inorganic hybrid silica monolith with octyl and sulfonic acid groups for capi
Rapid and High-Throughput Determination of Melamine in Milk Products and Eggs by Full Automatic On-l
Graphene-polymer composite: extraction of polycyclic aromatic hydrocarbons from water samples by sti
Selective sample pretreatment by molecularly imprinted polymer monolith for the analysis of fluoroqu
Rapid determination of Delta(9)-Tetrahydrocannabinol in saliva by polymer monolith microextraction c
Preparation and characterization of ceria-zirconia composite for enrichment and identification of ph
Polymer monolith microextraction with in situ derivatization and its application to high-performance
In-tube solid-phase microextraction based on hybrid silica monolith coupled to liquid chromatography
A new device for magnetic stirring-assisted dispersive liquid–liquid microextraction of UV filters i
Preparation and evaluation of hydroxylated poly(glycidyl methacrylate-co-ethylene dimethacrylate) mo
Rapid magnetic solid-phase extraction based on magnetite/silica/poly(methacrylic acid-co-ethylene gl
Development of in-tube solid-phase microextraction coupled to pressure-assisted CEC and its applicat
Application of humic acid bonded-silica as a hydrophilic-interaction chromatographic stationary phas
Rapid determination of aristolochic acid I and II in medicinal plants with high sensitivity by cucur
A simple and rapid method for simultaneous determination of benzoic and sorbic acids in food using i
Chromatographic evaluation and comparison of three beta-cyclodextrin-based stationary phases by capi
Determination of Benzimidazole Residues in Edible Animal Food by Polymer Monolith Microextraction Co
Preparation of a mixed-mode of hydrophobic/cation-exchange polymer monolith and its application to a
Determination of cytokinins in plant samples by polymer monolith microextraction coupled with hydrop
Molecular complex-based dispersive liquid-liquid microextraction Analysis of polar compounds in aque
Multiresidue determination of (fluoro)quinolone antibiotics in chicken by polymer monolith microextr
Combining poly (methacrylic acid-co-ethylene glycol dimethacrylate) monolith microextraction and oct
Synthesis and characterization of hierarchically porous silica microspheres with penetrable macropor
期刊信息
位置：