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题名: Capillary electrochromatography using a strong cation-exchange column with a dynamically modified cationic surfactant
作者: Ye, ML;  Zou, HF;  Liu, Z;  Ni, JY;  Zhang, YK
刊名: ANALYTICAL CHEMISTRY
发表日期: 2000-02-01
卷: 72, 期:3, 页:616-621
收录类别: SCI
文章类型: Article
部门归属: 4
项目归属: 403
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: A novel mode of capillary electrochromatography (CEC), called dynamically modified strong cation-exchange CEC (DMSCX-CEC), is described in this paper. A column packed with a strong cation-exchange (SCX) packing material was dynamically modified with a long-chain quaternary ammonium salt, cetyltrimethylammonium bromide (CTAB), which was added to the mobile phase. CTAB ions were adsorbed onto the surface of the SCX packing material, and the resulting hydrophobic layer on this packing was used as the stationary phase. Using the dynamically modified SCX column, neutral solutes were separated with the CEC mode. The highest number of theoretical plates obtained was about 190 000/m, and the relative standard deviations (RSD's) for migration times and capacity factors of alkylbenzenes were less than 1.0% and 2.0% for five consecutive runs, respectively. The effects of CTAB and methanol concentrations and the pH value of the mobile phase on the electroosmotic flow and the separation mechanism were investigated. Excellent simultaneous separation of the basic and neutral solutes in DMSCX-CEC with a high-pH mobile phase was obtained, A mixture containing the acidic, basic, and neutral compounds was well separated in this mode with a low-pH mobile phase; however, peak tailing for basic compounds was observed in this mobile phase.
关键词[WOS]: RIGID POLYMER MONOLITHS ;  LIQUID-CHROMATOGRAPHY ;  ION-EXCHANGE ;  ELECTROOSMOTIC FLOW ;  PACKED CAPILLARIES ;  STATIONARY PHASES ;  SEPARATION MEDIA ;  ELECTROPHORESIS ;  SILICA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000085168200035
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84999
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.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Chromatog R&A Ctr, Dalian 116011, Peoples R China

Recommended Citation:
Ye, ML,Zou, HF,Liu, Z,et al. Capillary electrochromatography using a strong cation-exchange column with a dynamically modified cationic surfactant[J]. ANALYTICAL CHEMISTRY,2000,72(3):616-621.
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