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Tang J, Wu H, Hu JJ, Yu J, Zhang J, Wang C, Yin T, Tang K. On a separation voltage polarity switching transient capillary isotachophoresis method for higher sample loading capacity and better separation performance. Analyst 2021; 146:124-131. [PMID: 33104142 DOI: 10.1039/d0an01640c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Limited sample loading capacity is one of the major reasons that prevents the utility of capillary electrophoresis (CE) as a routine separation method as compared to liquid chromatography (LC). In our previous study, separation voltage polarity switching transient capillary isotachophoresis (PS-tCITP) was proposed. Both sample loading capacity and separation resolution could be improved using a single PS-tCITP instead of routine transient capillary isotachophoresis (tCITP). In this study, a detailed investigation on the optimization strategy of the PS-tCITP method was performed systematically. A possible mechanism of sample preconcentration in multiple PS-tCITP was first proposed to better understand the multiple PS-tCITP process. Several optimization experiments were then performed, including single PS-tCITP, paused PS-tCITP and multiple PS-tCITP, sequentially using a mixture of five peptides. By selecting an optimum polarity switching time, sample loading capacity of 100% capillary volume could be achieved in a single PS-tCITP. Introducing an additional pause between each polarity switching in a single PS-tCITP further improved the separation resolution. Experimental results showed a baseline separation of five selected peptide standards at 100% sample loading volume using a 100 min pause in a single PS-tCITP. To further improve separation efficiency while still maintaining 100% sample loading volume, a multiple PS-tCITP technique was developed through this study. Compared to the separation performance of the optimal single PS-tCITP at 100% sample loading volume with a 10 min pause, the separation window was improved by 54% and the peak capacity was improved by 48% in the optimal four PS-tCITP with the same sample loading volume and pause.
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Affiliation(s)
- Ji Tang
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, P. R. China.
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Profiling of N-linked glycans from 100 cells by capillary electrophoresis with large-volume dual preconcentration by isotachophoresis and stacking. J Chromatogr A 2018; 1565:138-144. [DOI: 10.1016/j.chroma.2018.06.034] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/06/2018] [Accepted: 06/14/2018] [Indexed: 01/19/2023]
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3
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Tu X, Muhammad P, Liu J, Ma Y, Wang S, Yin D, Liu Z. Molecularly Imprinted Polymer-Based Plasmonic Immunosandwich Assay for Fast and Ultrasensitive Determination of Trace Glycoproteins in Complex Samples. Anal Chem 2016; 88:12363-12370. [DOI: 10.1021/acs.analchem.6b03597] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Xueying Tu
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Pir Muhammad
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Jia Liu
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Yanyan Ma
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Shuangshou Wang
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Danyang Yin
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Zhen Liu
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
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Ju HX, Zhuang QK, Long YT. The Preface. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lian DS, Zhao SJ. Highly sensitive analysis of nucleic acids using capillary gel electrophoresis with ultraviolet detection based on the combination of matrix field-amplified and head-column field-amplified stacking injection. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 978-979:29-42. [DOI: 10.1016/j.jchromb.2014.11.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/16/2014] [Accepted: 11/20/2014] [Indexed: 12/17/2022]
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6
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Pang N, Bai Y, Zhou Y, Yang X, Zhang Z, Nie H, Fu X, Liu H. Rapid and subnanomolar assay of recombinant human erythropoietin by capillary electrophoresis using NanoOrange precolumn labeling and laser-induced fluorescence detection. J Sep Sci 2014; 37:2233-8. [DOI: 10.1002/jssc.201400263] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/07/2014] [Accepted: 05/12/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Nannan Pang
- School of Chemical and Biological Engineering; University of Science and Technology; Beijing P. R. China
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Yu Bai
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Yu Zhou
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Xia Yang
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Zhengxiang Zhang
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Honggang Nie
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Xiaofang Fu
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
| | - Huwei Liu
- Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Institute of Analytical Chemistry; College of Chemistry and Molecular Engineering, Peking University; Beijing P. R. China
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Zhang Z, Zhang F, Liu Y. Recent Advances in Enhancing the Sensitivity and Resolution of Capillary Electrophoresis. J Chromatogr Sci 2013; 51:666-83. [DOI: 10.1093/chromsci/bmt012] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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8
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de Kort BJ, de Jong GJ, Somsen GW. Profiling of erythropoietin products by capillary electrophoresis with native fluorescence detection. Electrophoresis 2012; 33:2996-3001. [DOI: 10.1002/elps.201200303] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/05/2012] [Accepted: 08/02/2012] [Indexed: 12/22/2022]
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Wang H, Dou P, Lü C, Liu Z. Immuno-magnetic beads-based extraction-capillary zone electrophoresis-deep UV laser-induced fluorescence analysis of erythropoietin. J Chromatogr A 2012; 1246:48-54. [DOI: 10.1016/j.chroma.2012.02.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 02/03/2012] [Accepted: 02/06/2012] [Indexed: 01/08/2023]
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10
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Review of recent developments of on-line sample stacking techniques and their application in capillary electrophoresis. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0007-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
AbstractCapillary electrophoresis (CE) has become one of the most useful tools in separation science because of its high separation efficiency, low cost, versatility, ease of sample preparation and automation. However, some limitations of CE, such as poor concentration sensitivity due to its lower sample loading and shorter optical path length, limits its further applications in separation science. In order to solve this problem, various on-line sample preconcentration techniques such as transient isotachophoresis preconcentration, field-enhanced sample stacking, micelle to solvent stacking, micelle collapse, dynamic pH junction, sweeping, solid phase extraction, single drop microextraction and liquid phase microextraction have been combined with CE. Recent developments, applications and some variants together with different combinations of these techniques integrating in CE are reviewed here and our discussions will be confined to the past three years (2008–2011).
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Liu J, Ren L, Liu Y, Li H, Liu Z. Weak anion exchange chromatographic profiling of glycoprotein isoforms on a polymer monolithic capillary. J Chromatogr A 2012; 1228:276-82. [DOI: 10.1016/j.chroma.2011.08.079] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Revised: 08/13/2011] [Accepted: 08/21/2011] [Indexed: 10/17/2022]
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Girard M, Puerta A, Diez-Masa JC, de Frutos M. High resolution separation methods for the determination of intact human erythropoiesis stimulating agents. A review. Anal Chim Acta 2012; 713:7-22. [DOI: 10.1016/j.aca.2011.11.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 11/10/2011] [Accepted: 11/11/2011] [Indexed: 12/17/2022]
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13
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Optimization of dynamic pH junction for the sensitive determination of amino acids in urine by capillary electrophoresis. Anal Bioanal Chem 2011; 401:3275-81. [DOI: 10.1007/s00216-011-5445-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 09/22/2011] [Accepted: 09/23/2011] [Indexed: 01/11/2023]
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Online sample pre-concentration via dynamic pH junction in capillary and microchip electrophoresis. J Sep Sci 2011; 34:2800-21. [DOI: 10.1002/jssc.201100414] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Malá Z, Gebauer P, Boček P. Contemporary sample stacking in analytical electrophoresis. Electrophoresis 2010; 32:116-26. [DOI: 10.1002/elps.201000327] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 08/09/2010] [Accepted: 08/09/2010] [Indexed: 12/31/2022]
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Breadmore MC, Dawod M, Quirino JP. Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips (2008-2010). Electrophoresis 2010; 32:127-48. [PMID: 21171119 DOI: 10.1002/elps.201000412] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 09/15/2010] [Accepted: 09/16/2010] [Indexed: 01/22/2023]
Abstract
Capillary electrophoresis has been alive for over two decades now; yet, its sensitivity is still regarded as being inferior to that of more traditional methods of separation such as HPLC. As such, it is unsurprising that overcoming this issue still generates much scientific interest. This review continues to update this series of reviews, first published in Electrophoresis in 2007, with an update published in 2009 and covers material published through to June 2010. It includes developments in the fields of stacking, covering all methods from field-amplified sample stacking and large volume sample stacking, through to ITP, dynamic pH junction and sweeping. Attention is also given to on-line or in-line extraction methods that have been used for electrophoresis.
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Affiliation(s)
- Michael C Breadmore
- Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Hobart, TAS, Australia.
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Affiliation(s)
- Nicholas W. Frost
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
| | - Meng Jing
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
| | - Michael T. Bowser
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455
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