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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
KeywordCapillary Electrochromatography Field-amplified Sample Stacking Monolithic Stationary Phase On-line Concentration On-column Enrichment
Source PublicationELECTROPHORESIS
2004-02-01
DOI10.1002/elps.200305693
Volume25Issue:3Pages:421-427
Indexed BySCI
SubtypeArticle
Funding Project1810
Contribution Rank1;1
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS SubjectBiochemical Research Methods ; Chemistry, Analytical
WOS Research AreaBiochemistry & Molecular Biology ; Chemistry
WOS KeywordRIGID POLYMER MONOLITHS ; SEPARATION MEDIA ; LIQUID-CHROMATOGRAPHY ; PRECONCENTRATION ; ELECTROPHORESIS ; UV
AbstractA 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.
Language英语
URL查看原文
WOS IDWOS:000188996900005
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/81649
Collection中国科学院大连化学物理研究所
Affiliation1.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
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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