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题名: On-line concentration of neutral and charged species in capillary electrochromatography with a methacrylate-based monolithic stationary phase
作者: Ping, GC;  Zhang, YK;  Zhang, WB;  Zhang, L;  Zhang, LH;  Schmitt-Kopplin, P;  Kettrup, A
关键词: capillary electrochromatography ;  field-amplified sample stacking ;  monolithic stationary phase ;  on-line concentration ;  on-column enrichment
刊名: ELECTROPHORESIS
发表日期: 2004-02-01
DOI: 10.1002/elps.200305693
卷: 25, 期:3, 页:421-427
收录类别: SCI
文章类型: Article
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: A method involving self-concentration, on-column enrichment and field-amplified sample stacking for on-line concentration in capillary electrochromatography with a polymer monolithic column is presented. Since monolithic columns eliminate the frit fabrication and the problems associated with frits, the experimental conditions could be more flexibly adjusted to obtain higher concentration factor in comparison with conventional particulate packed columns. With self-concentration effect, the detection sensitivity of benzene and hexylbenzene is improved by a factor of 4 and 8, respectively. With on-column enrichment and ultralong injection, improvement as high as 22 000 times in detection sensitivity of benzoin is achieved. Furthermore, a combination of the three above-mentioned methods yields up to a 24000-fold improvement in detection sensitivity for caffeine, a charged compound. Parameters affecting the efficiency of on-line concentration are investigated systematically. In addition, equations describing on-line concentration process are deduced.
关键词[WOS]: RIGID POLYMER MONOLITHS ;  SEPARATION MEDIA ;  LIQUID-CHROMATOGRAPHY ;  PRECONCENTRATION ;  ELECTROPHORESIS ;  UV
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000188996900005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81649
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 Chromatograph Res & Anal Ctr, Dalian 116011, Peoples R China
2.GSF Natl Ctr Environm & Hlth, Inst Ecol Chem, Neuherberg, Germany
3.Tech Univ Munich, Lehrstuhl Okol Chem & Unweltanalyt, Inst Chem, D-8050 Freising Weihenstephan, Weihenstephan, Germany

Recommended Citation:
Ping, GC,Zhang, YK,Zhang, WB,et al. On-line concentration of neutral and charged species in capillary electrochromatography with a methacrylate-based monolithic stationary phase[J]. ELECTROPHORESIS,2004,25(3):421-427.
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