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学科主题: 药学
题名:
Exact electric field strength over the packed capillary electrochromatography column bed, theoretical considerations and practical determination
作者: Guo, W; Yang, CH; Xu, BJ
关键词: capillary electrochromatography ; packed column bed ; electric field strength ; resistance of cec column ; resistivity of the mobile phase
刊名: JOURNAL OF CHROMATOGRAPHY A
发表日期: 2004-12-03
DOI: 10.1016/j.chroma.2004.10.035
卷: 1059, 期:1-2, 页:175-180
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Biochemical Research Methods ; Chemistry, Analytical
研究领域[WOS]: Biochemistry & Molecular Biology ; Chemistry
关键词[WOS]: ELECTROOSMOTIC FLOW ; PACKING ; CONDUCTIVITY ; CHROMATOGRAPHY ; PRESSURE
英文摘要:

On the basis of the experiments, it was proved that Ohm′s law holds true in a capillary electrochromatography (CEC) column. By using the additivity of the potential drop over the packed and unpacked sections, the exact values of the electric field strength over the packed CEC column bed were determined experimentally. The ratio of the resistance of packed CEC column sections to that of an open capillary of the same length (R-p/R-o.Lp) were calculated. Some theoretical calculations were made to show how some structural parameters of particle lattice affect the resulting R-p/R-o.Lp value of the column bed formed accordingly. It is suggested that to correctly elucidate the EOF phenomenon in a CEC column, the potential drop over the packed and unpacked column sections, E-p and E-o, should be accounted for respectively, rather than using the average field strength over the total column length. (C) 2004 Elsevier B.V. All rights reserved.

语种: 英语
WOS记录号: WOS:000225412200022
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/57925
Appears in Collections:北京大学药学院_期刊论文

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作者单位: 1.Hunan Normal Univ, Sch Med, Hunan 410006, Peoples R China
2.Peking Univ, Sch Pharmaceut Sci, Dept Analyt Chem, Beijing 100083, Peoples R China
3.Capital Univ Med Sci, Sch Pharmaceut Sci & Chem Biol, Beijing 100054, Peoples R China

Recommended Citation:
Guo, W,Yang, CH,Xu, BJ. Exact electric field strength over the packed capillary electrochromatography column bed, theoretical considerations and practical determination[J]. JOURNAL OF CHROMATOGRAPHY A,2004,1059(1-2):175-180.
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