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题名: On-line enrichment of neutral solute in capillary electrochromatography
作者: Zhang, WB;  Zhu, J;  You, JM;  Zhang, B;  Ping, GC;  Zhang, YK
关键词: electrochromatography ;  on-line enrichment ;  neutral solute
刊名: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
发表日期: 2001-08-01
卷: 29, 期:8, 页:869-875
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: On-line enrichment of neutral solute in capillary electrochromatography (GEC) can be achieved by varying the concentration of organic modifier in sample solution and running buffer, together with extending the injection time. On-line enrichment is mainly controlled by two processes: self-enrichment and transfer enrichment. Based on the method of relaxation theory, an expression, which described the relationship between enrichment factor and running condition, was theoretically derived. Due to this expression, higher enrichment factor can be obtained by extending injection time, and the effect of the injection time on column efficiency depended on the concentration of organic modifier. If there were large difference of concentration of organic modifier in sample solution and naming buffer, proper extending of injection time would have a few effect on column efficiency. The theoretical results were experimentally proved with two drags: benzoin and mephenytoin. The enrichment factor of more than 100 folds was obtained.
关键词[WOS]: CHROMATOGRAPHY
语种: 英语
WOS记录号: WOS:000170735600001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138927
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 Res & Anal Ctr, Dalian 116011, Peoples R China

Recommended Citation:
Zhang, WB,Zhu, J,You, JM,et al. On-line enrichment of neutral solute in capillary electrochromatography[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2001,29(8):869-875.
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