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题名: A vacuum assisted dynamic evaporation interface for two-dimensional normal phase/reverse phase liquid chromatography
作者: Ding, Kun1;  Xu, Yuan1;  Wang, Hua1;  Duan, Chunfeng1;  Guan, Yafeng1
通讯作者: 关亚风
关键词: Solvent evaporation interface ;  Loop-type interface ;  Two-dimensional liquid chromatography ;  Band compression ;  Vacuum
刊名: JOURNAL OF CHROMATOGRAPHY A
发表日期: 2010-08-20
DOI: 10.1016/j.chroma.2010.06.053
卷: 1217, 期:34, 页:5477-5483
收录类别: SCI
文章类型: Article
部门归属: 1
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 vacuum assisted dynamic solvent evaporation interface for coupling of two-dimensional normal phase/reverse phase liquid chromatography was developed and evaluated. A normal-phase liquid chromatographic (NPLC) column of a 250 mm x 4.6 mm I.D. 5 mu m CN phase was used as the first dimension, and a reversed-phase liquid chromatographic (RPLC) column of 250 mm x 4.6 mm I.D. 5 mu m C(18) phase was used as the second dimension. The eluent from the first dimension flowed into a fraction loop, and the solvent in the eluent was dynamically evaporated and removed by vacuum as it was entering the fraction loop of the interface. The non-evaporable analytes was retained and enriched in about 5-25 mu L solution within the loop. Up to 1 mL/min of mobile phase from the first dimension can be evaporated and removed dynamically by the interface. The mobile phase from the second dimension then entered the loop, and dissolved the concentrated analytes retained inside the loop, and carried them onto the second dimension column for further separation. The operation conditions of the two dimensions were independent from each other, and both dimensions were operated at their optimal chromatographic conditions. We evaluated the interface by controlling the loop temperature in a water bath at normal temperature, and investigated the sample losses by using standard samples with different boiling points. It was found that the sample loss due to evaporation in the interface was negligible for non-volatile samples or for components with boiling point above 340 degrees C. The interface realizes fast solvent removal of mL volume of fraction and concentration of the fraction into tenth of mu L volume, and injection of the concentrated fraction on the secondary column. The chromatographic performance of the two-dimensional LC system was enhanced without compromise of separation efficiency and selectivity on each dimension. (C) 2010 Elsevier B.V. All rights reserved.
关键词[WOS]: COMPLEX-MIXTURES ;  SEPARATIONS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000281291000004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103411
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, Key Lab Separat Sci Analyt Chem CAS, Dept Instrumentat & Analyt Chem, Dalian 116023, Peoples R China

Recommended Citation:
Ding, Kun,Xu, Yuan,Wang, Hua,et al. A vacuum assisted dynamic evaporation interface for two-dimensional normal phase/reverse phase liquid chromatography[J]. JOURNAL OF CHROMATOGRAPHY A,2010,1217(34):5477-5483.
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