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题名: Study of an electroosmotic pump for liquid delivery and its application in capillary column liquid chromatography
作者: Chen, LX;  Ma, JP;  Guan, YF
关键词: electroosmotic pump ;  pumps ;  instrumentation
刊名: JOURNAL OF CHROMATOGRAPHY A
发表日期: 2004-03-05
DOI: 10.1016/j.chroma.2003.11.071
卷: 1028, 期:2, 页:219-226
收录类别: SCI
文章类型: Article
项目归属: 105
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 packed-bed electroosmotic pump (EOP) was constructed and evaluated. The EOP consisted of three capillary columns packed in parallel, a gas-releasing device, Pt electrodes and a high-voltage power supply. The EOP could generate output pressure above 5.0 MPa and constant flow rate in the range of nl/min to a few mul/min for pure water, pure methanol, 2 mM potassium dihydrogenphosphate buffer, the buffer-methanol mixture and the pure water-methanol mixture at applied potentials less than 20 W The composition of solvent before/after pumping was quantitatively determined by using a gas chromatograph equipped with both flame ionization detector and thermal conductivity detector. It was found that there were no apparent changes in composition and relative concentrations after pumping process for a methanol-ethanol-acetonitrile mixture and a methanol-water mixture. Theoretical aspect of the EOP was discussed in detail. An capillary HPLC system consisting of the EOP, an injection valve, a 15 cm x 320 mum i.d., 5 mum Spherigel C(18) stainless steel analytical column, and an on-column UV detector was connected to evaluate the performance of the EOP. A comparative study was also carried out with a mechanical capillary HPLC pump on the same system. The results demonstrated that the reproducibility of flow rate and the pulsation-free flow property of the EOP are superior to that of mechanical pump in capillary HPLC application. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: MAGNETOHYDRODYNAMIC MICROPUMP ;  FLOW ;  FABRICATION ;  SYSTEMS ;  HPLC
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000188738600005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81699
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, Dept Analyt Chem & Microinstrumentat, Dalian 116012, Peoples R China

Recommended Citation:
Chen, LX,Ma, JP,Guan, YF. Study of an electroosmotic pump for liquid delivery and its application in capillary column liquid chromatography[J]. JOURNAL OF CHROMATOGRAPHY A,2004,1028(2):219-226.
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