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题名: Abnormal phenomenon of the dependence of the retention factors for uncharged species on applied voltage in capillary electrochromatography
作者: Ping, GC;  Zhang, WB;  Zhang, L;  Zhang, LH;  Schmitt-Kopplin, P;  Kettrup, A;  Zhang, YK
关键词: capillary electrochromatography ;  polymer monolithic column ;  applied voltage ;  retention factor
刊名: CHROMATOGRAPHIA
发表日期: 2003-06-01
卷: 57, 期:11-12, 页:777-781
收录类别: SCI
文章类型: Article
部门归属: 1810
项目归属: 1810
产权排名: 1;1
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine ;  Physical Sciences
类目[WOS]: Biochemical Research Methods ;  Chemistry, Analytical
研究领域[WOS]: Biochemistry & Molecular Biology ;  Chemistry
英文摘要: Polymethacrylate-based monolithic columns were prepared for capillary electrochromatography (CEC) by in situ copolymerization of butyl methacrylate (BMA), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), and ethylene dimethacrylate (EDMA) in the presence of a porogen in fused-silica capillaries of 100 mum I.D. The abnormal phenomenon that retention factors for neutral species decreases with applied voltage in CEC was observed. Capillary electrophoresis (CE) instruments usually require a period of time to increase voltage from 0 kV to desired value, which is called as ramp time. Such ramp time and any error in the determination of dead time should be taken into account during the accurate calculation of retention factors. After the correction of the retention factors, the plots of the corrected factors for alkylbenzene versus applied voltage were made, the absolute value of the plot slopes are less than 1.8 X 10(-4), Which indicates that the corrected retention times for neutral species do not show any dependence on applied voltage. Further, the plots of the corrected retention times for acidic and basic compounds versus the reciprocal of applied voltage were drawn, where the target compounds were eluted in neutral form. The very nice linearity of the plots was obtained. The linear correlation coefficients are over 0.999. Here, the slopes of the plots represent
关键词[WOS]: PERFORMANCE LIQUID-CHROMATOGRAPHY ;  RIGID POLYMER MONOLITHS ;  SEPARATION MEDIA ;  STATIONARY PHASES ;  HOMOLOGOUS SERIES ;  CONTINUOUS BEDS ;  COLUMNS ;  BEHAVIOR ;  MEMBERS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000183802500012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/83433
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
2.GSF, Natl Ctr Environm & Hlth, Inst Ecol Chem, D-85764 Neuherberg, Germany

Recommended Citation:
Ping, GC,Zhang, WB,Zhang, L,et al. Abnormal phenomenon of the dependence of the retention factors for uncharged species on applied voltage in capillary electrochromatography[J]. CHROMATOGRAPHIA,2003,57(11-12):777-781.
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