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On-line concentration of neutral and charged species in capillary electrochromatography with a methacrylate-based monolithic stationary phase
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
2004-02-01
DOI10.1002/elps.200305693
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
关键词[WOS]RIGID POLYMER MONOLITHS ; SEPARATION MEDIA ; LIQUID-CHROMATOGRAPHY ; PRECONCENTRATION ; ELECTROPHORESIS ; UV
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.
语种英语
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WOS记录号WOS:000188996900005
引用统计
被引频次:31[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/81649
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Ping, GC.,Zhang, YK.,Zhang, WB.,Zhang, L.,Zhang, LH.,...&Kettrup, A.(2004).On-line concentration of neutral and charged species in capillary electrochromatography with a methacrylate-based monolithic stationary phase.ELECTROPHORESIS,25(3),421-427.
MLA Ping, GC,et al."On-line concentration of neutral and charged species in capillary electrochromatography with a methacrylate-based monolithic stationary phase".ELECTROPHORESIS 25.3(2004):421-427.
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