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题名: Study on the separation mechanisms in capillary electrochromatography with bare silica-packed column
作者: Ye, ML;  Zou, HF;  Liu, Z;  Zhang, LH;  Ni, JY;  Zhang, YK
关键词: capillary electrochromatography ;  bare silica ;  separation mechanism ;  dynamically modified
刊名: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
发表日期: 1999-09-01
卷: 27, 期:9, 页:1007-1012
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: The separation mechanisms in capillary electromatography (CEC) of bare silica - packed column was investigated under aqueous - organic mobile phases. The separations of five typical solutes, including apolar compound (benzene), polar compounds (formamide and dimethyl formamide) and basic compounds (pyridine and quinoline), showed that reverse phase retention, normal phase retention, ion-exchange and electrophoresis mechanisms were involved. The effect of the concentration of organic modifier, the concentration of buffer and the pH value on separation were investigated. Due to the hydrophilicity of bare silica, the silica-packed column exhibits the following merit, i. e., the mobile phase composition can change in rather large range of organic modifier content, buffer concentration and pH value. This means that the bubble problem that are usually met in ODS-packed column can be minimized with the silica-packed column. Additionally, we presented a novel model of CEC, termed as dynamically modified silica column CEC. Five alkyl substitued benzenes were baseline separated with a mobile phase containing cetyltrimethylammonium bromide.
关键词[WOS]: REVERSED-PHASE ;  BASIC COMPOUNDS ;  GEL
语种: 英语
WOS记录号: WOS:000083010500005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138573
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Acad Sinica, Dalian Inst Chem Phys, Natl Chromatog Res & Anal Ctr, Dalian 116011, Peoples R China

Recommended Citation:
Ye, ML,Zou, HF,Liu, Z,et al. Study on the separation mechanisms in capillary electrochromatography with bare silica-packed column[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,1999,27(9):1007-1012.
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