1
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Beutner A, Piendl SK, Wert S, Matysik FM. Methodical studies of the simultaneous determination of anions and cations by IC×CE–MS using arsenic species as model analytes. Anal Bioanal Chem 2018; 410:6321-6330. [DOI: 10.1007/s00216-018-1241-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/11/2018] [Accepted: 07/02/2018] [Indexed: 01/01/2023]
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2
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Francisco KJM, do Lago CL. Improving thermal control of capillary electrophoresis with mass spectrometry and capacitively coupled contactless conductivity detection by using 3D printed cartridges. Talanta 2018; 185:37-41. [PMID: 29759214 DOI: 10.1016/j.talanta.2018.03.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 03/14/2018] [Accepted: 03/15/2018] [Indexed: 10/17/2022]
Abstract
A 3D-printed cartridge was developed to improve the interface between a capillary electrophoresis instrument and a mass spectrometer. The thermostated airflow from the CE was guided to the entrance of the electrospray source keeping as much as possible the silica capillary in a proper Joule-heating dissipation environment. Hollow 3D-printed walls made of ABS covered by a 0.2 mm thick copper foil on the inner side were used. The cartridge also allows including up to two capacitively coupled contactless conductivity detectors (C4Ds). Experiments about the separation of monoethyl carbonate (a thermally unstable species) shows that the peak area obtained with the original cartridge is only 21% of the value obtained with the 3D-printed cartridge, which demonstrates the improvement in heat dissipation.
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Affiliation(s)
- Kelliton José Mendonça Francisco
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil.
| | - Claudimir Lucio do Lago
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP CEP 05508-000, Brazil.
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3
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Zhu Q, Zhang Q, Zhang N, Gong M. Alternate injections coupled with flow-gated capillary electrophoresis for rapid and accurate quantitative analysis of urine samples. Anal Chim Acta 2017; 978:55-60. [PMID: 28595727 PMCID: PMC5522808 DOI: 10.1016/j.aca.2017.04.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 04/24/2017] [Accepted: 04/27/2017] [Indexed: 01/12/2023]
Abstract
Capillary electrophoresis (CE) is a powerful separation technique with advantages over HPLC in terms of separation efficiency, speed, and cost. However, CE suffers in poor reproducibility in quantitative chemical analysis, which is one of major drawbacks preventing its widespread use in routine analytical laboratories. Here we report a novel strategy to enhance the quantitative capability of flow-gated CE. The platform integrated dual flow branches to respectively supply a sample and its standard additions that were then alternately injected into a single capillary for rapid separations (typically 20-90 s). A micro-fabricated switch was used to enable the alternate injections. It was assumed that the analytical system maintained constant conditions during neighboring injections that served as external self-standards for quantitation. This strategy was expected to reduce uncertainties caused by the fluctuation in capillary conditions and the drift of detection systems. Experimental results demonstrated that the dual-branch flow-gated CE coupled with alternate injections significantly improved the reproducibility with respect to peak height ratios under deliberate variations in injection volumes, separation voltages, optical focusing, and laser power; and thus the interday precision was ensured. To demonstrate its applicability, cyanide and amino acids in human urine were quantified rapidly with the one-point standard addition method after fluorogenic derivatization with naphthalene-2,3-dicarboxaldehyde (NDA), and the measurement accuracy was validated by determining the recovery of standard cyanide added to a urinary matrix. This strategy would be valuable to enable the quantitative capability of flow-gated CE in the measurements of a broad range of analytes, especially those lacking suited internal standards.
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Affiliation(s)
- Qingfu Zhu
- Department of Chemistry, Wichita State University, Wichita, KS 67260, United States
| | - Qiyang Zhang
- Department of Chemistry, Wichita State University, Wichita, KS 67260, United States
| | - Ning Zhang
- Department of Chemistry, Wichita State University, Wichita, KS 67260, United States
| | - Maojun Gong
- Department of Chemistry, Wichita State University, Wichita, KS 67260, United States.
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4
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Šlampová A, Kubáň P. Injections from sub-μL sample volumes in commercial capillary electrophoresis. J Chromatogr A 2017; 1497:164-171. [DOI: 10.1016/j.chroma.2017.03.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 03/22/2017] [Accepted: 03/23/2017] [Indexed: 11/17/2022]
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5
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Tycova A, Vido M, Kovarikova P, Foret F. Interface-free capillary electrophoresis-mass spectrometry system with nanospray ionization—Analysis of dexrazoxane in blood plasma. J Chromatogr A 2016; 1466:173-9. [DOI: 10.1016/j.chroma.2016.08.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/16/2016] [Accepted: 08/18/2016] [Indexed: 01/02/2023]
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6
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Moini M, Rollman CM. Portable, Battery Operated Capillary Electrophoresis with Optical Isomer Resolution Integrated with Ionization Source for Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:388-393. [PMID: 26644308 DOI: 10.1007/s13361-015-1314-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/17/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
We introduce a battery operated capillary electrophoresis electrospray ionization (CE/ESI) source for mass spectrometry with optical isomer separation capability. The source fits in front of low or high resolution mass spectrometers similar to a nanospray source with about the same weight and size. The source has two high voltage power supplies (±25 kV HVPS) capable of operating in forward or reverse polarity modes and powered by a 12 V rechargeable lithium ion battery with operation time of ~10 h. In ultrafast CE mode, in which short narrow capillaries (≤15 μm i.d., 15-25 cm long) and field gradients ≥1000 V/cm are used, peak widths at the base are <1 s wide. Under these conditions, the source provides high resolution separation, including optical isomer resolution in ~1 min. Using a low resolution mass spectrometer (LTQ Velos) with a scan time of 0.07 s/scan, baseline separation of amino acids and their optical isomers were achieved in ~1 min. Moreover, bovine serum albumin (BSA) was analyzed in ~1 min with 56% coverage using the data-dependent MS/MS. Using a high resolution mass spectrometer (Thermo Orbitrap Elite) with 15,000 resolution, the fastest scan time achieved was 0.15 s, which was adequate for CE-MS analysis when optical isomer separation is not required or when the optical isomers were well separated. Figures of merit including a detection limit of 2 fmol and linear dynamic range of two orders of magnitude were achieved for amino acids.
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Affiliation(s)
- Mehdi Moini
- Department of Forensic Sciences, George Washington University, Washington, DC, 20007, USA.
| | - Christopher M Rollman
- Department of Forensic Sciences, George Washington University, Washington, DC, 20007, USA
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7
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Garty G, Ehsan MU, Buonanno M, Yang Z, Sweedler JV, Brenner DJ. Microbeam-coupled capillary electrophoresis. RADIATION PROTECTION DOSIMETRY 2015; 166:188-191. [PMID: 25870435 PMCID: PMC4572141 DOI: 10.1093/rpd/ncv148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Within the first few microseconds following a charged particle traversal of a cell, numerous oxygen and nitrogen radicals are formed along the track. Presented here is a method, using capillary electrophoresis, for simultaneous measurement, within an individual cell, of specific reactive oxygen species, such as the superoxide radical ([Formula: see text]) as well as the native and oxidised forms of glutathione, an ubiquitous anti-oxidant that assists the cell in coping with these species. Preliminary data are presented as well as plans for integrating this system into the charged particle microbeam at Columbia University.
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Affiliation(s)
- G Garty
- Radiological Research Accelerator Facility, Columbia University, P.O. Box 21, Irvington, NY 10533, USA
| | - M U Ehsan
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL 61801, USA
| | - M Buonanno
- Radiological Research Accelerator Facility, Columbia University, P.O. Box 21, Irvington, NY 10533, USA
| | - Z Yang
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL 61801, USA
| | - J V Sweedler
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, IL 61801, USA
| | - D J Brenner
- Radiological Research Accelerator Facility, Columbia University, P.O. Box 21, Irvington, NY 10533, USA
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8
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Schiavone NM, Sarver SA, Sun L, Wojcik R, Dovichi NJ. High speed capillary zone electrophoresis-mass spectrometry via an electrokinetically pumped sheath flow interface for rapid analysis of amino acids and a protein digest. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 991:53-8. [PMID: 25913424 DOI: 10.1016/j.jchromb.2015.04.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 04/01/2015] [Accepted: 04/03/2015] [Indexed: 12/22/2022]
Abstract
While capillary zone electrophoresis (CZE) has been used to produce very rapid and efficient separations, coupling these high-speed separations with mass spectrometry (MS) has been challenging. Now, with much faster and sensitive mass spectrometers, it is possible to take full advantage of the CZE speed and reconstruct the fast migrating peaks. Here are three high-speed CZE-MS analyses via an electrokinetically pumped sheath-flow interface. The first separation demonstrates CZE-ESI-MS of an amino acid mixture with a 2-min separation, >50,000 theoretical plates, low micromolar concentration detection limits, and subfemtomole mass detection limits (LTQ XL mass spectrometer). The second separation with our recently improved third-generation CE-MS interface illustrates a 20 amino acid separation in ∼7min with an average over 200,000 plate counts, and results in almost-baseline resolution of structural isomers, leucine and isoleucine. The third separation is of a BSA digest with a reproducible CZE separation and mass spectrometry detection in 2min. CZE-MS/MS analysis of the BSA digest identified 31 peptides, produced 52% sequence coverage, and generated a peak capacity of ∼40 across the 1-min separation window (Q-Exactive mass spectrometer).
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Affiliation(s)
- Nicole M Schiavone
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Scott A Sarver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Liangliang Sun
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Roza Wojcik
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Norman J Dovichi
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
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9
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Capillary electrophoresis in an extended nanospray tip–electrospray as an electrophoretic column. J Chromatogr A 2015; 1388:274-9. [DOI: 10.1016/j.chroma.2015.02.042] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 02/13/2015] [Accepted: 02/14/2015] [Indexed: 11/23/2022]
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10
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Beutner A, Kochmann S, Mark JJP, Matysik FM. Two-dimensional separation of ionic species by hyphenation of capillary ion chromatography × capillary electrophoresis-mass spectrometry. Anal Chem 2015; 87:3134-8. [PMID: 25708415 DOI: 10.1021/ac504800d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The separation of complex mixtures such as biological or environmental samples requires high peak capacities, which cannot be established with a single separation technique. Therefore, multidimensional systems are in demand. In this work, we present the hyphenation of the two most important (orthogonal) techniques in ion analysis, namely, ion chromatography (IC) and capillary electrophoresis (CE), in combination with mass spectrometry. A modulator was developed ensuring a well-controlled coupling of IC and CE separations. Proof-of-concept measurements were performed using a model system consisting of nucleotides and cyclic nucleotides. The data are presented in a multidimensional contour plot. Analyte stacking in the CE separation could be exploited on the basis of the fact that the suppressed IC effluent is pure water.
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Affiliation(s)
- Andrea Beutner
- Institute for Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Sven Kochmann
- Institute for Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Jonas Josef Peter Mark
- Institute for Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Frank-Michael Matysik
- Institute for Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
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11
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do Lago CL, Vidal DTR, Francisco KJM, dos Santos VB. A simple approach to compensate the suction caused by the electrospray ionization source in capillary electrophoresis-mass spectrometry systems. Electrophoresis 2014; 35:2412-6. [DOI: 10.1002/elps.201300651] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 02/20/2014] [Accepted: 02/21/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Claudimir Lucio do Lago
- Departamento de Química Fundamental, Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
| | - Denis Tadeu Rajh Vidal
- Departamento de Química Fundamental, Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
| | | | - Vagner Bezerra dos Santos
- Departamento de Química Fundamental, Instituto de Química; Universidade de São Paulo; São Paulo SP Brazil
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12
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Moini M, Martinez B. Ultrafast capillary electrophoresis/mass spectrometry with adjustable porous tip for a rapid analysis of protein digest in about a minute. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:305-310. [PMID: 24375882 DOI: 10.1002/rcm.6786] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 11/07/2013] [Accepted: 11/12/2013] [Indexed: 06/03/2023]
Abstract
RATIONALE This paper introduces a novel ultrafast capillary electrophoresis (UFCE) mass spectrometry (MS) method comprised of a short (< 20 cm) and narrow (≤ 5 µm) capillary, with an integrated porous segment at the terminus of the capillary, for sheathless interfacing of CE to MS. The sheathless nature of the interface minimizes dead volume which is particularly important for ultrafast CE because of the small diameters of the capillaries. METHODS The separation voltage across the capillary was set to produce an electric field of ≥1000 V/cm to provide an analysis time of approximately 1 min. For the analysis of peptides and protein digests, a background electrolyte containing 0.1% cationic polymer (polybrene or Poly-E) in 0.1% acetic acid in water was used to prevent analyte-wall interaction. RESULTS Uniquely, the porous tip of the capillary is adjustable. This allows the porous tip to be pulled inside the sheath liquid for sample stacking during injection, or sample focusing in isoelectric focusing (IEF), or, alternatively, pushed outside of the sheath liquid for electrospray ionization (ESI). The adjustable interface preserves electrical conductivity during electrokinetic injection with reverse electro-osmotic flow. Therefore, pre-concentration of analytes at the capillary inlet is achieved without the need to disassemble the interface, improving the throughput. CONCLUSIONS As a proof of concept, the application of UFCE-MS was demonstrated by the analysis of a peptide mixture and a protein digest in ~1 min.
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Affiliation(s)
- Mehdi Moini
- Museum Conservation Institute, Smithsonian Institution, Suitland, MD, USA
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13
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Romanova EV, Aerts JT, Croushore CA, Sweedler JV. Small-volume analysis of cell-cell signaling molecules in the brain. Neuropsychopharmacology 2014; 39:50-64. [PMID: 23748227 PMCID: PMC3857641 DOI: 10.1038/npp.2013.145] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 04/26/2013] [Accepted: 05/06/2013] [Indexed: 12/19/2022]
Abstract
Modern science is characterized by integration and synergy between research fields. Accordingly, as technological advances allow new and more ambitious quests in scientific inquiry, numerous analytical and engineering techniques have become useful tools in biological research. The focus of this review is on cutting edge technologies that aid direct measurement of bioactive compounds in the nervous system to facilitate fundamental research, diagnostics, and drug discovery. We discuss challenges associated with measurement of cell-to-cell signaling molecules in the nervous system, and advocate for a decrease of sample volumes to the nanoliter volume regimen for improved analysis outcomes. We highlight effective approaches for the collection, separation, and detection of such small-volume samples, present strategies for targeted and discovery-oriented research, and describe the required technology advances that will empower future translational science.
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Affiliation(s)
- Elena V Romanova
- Beckman Institute for Advanced Science and Technology and the Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Jordan T Aerts
- Beckman Institute for Advanced Science and Technology and the Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Callie A Croushore
- Beckman Institute for Advanced Science and Technology and the Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Jonathan V Sweedler
- Beckman Institute for Advanced Science and Technology and the Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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14
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Wang CW, Her GR. Sheathless capillary electrophoresis electrospray ionization-mass spectrometry interface based on poly(dimethylsiloxane) membrane emitter and thin conducting liquid film. Electrophoresis 2013; 34:2538-45. [DOI: 10.1002/elps.201300069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 05/03/2013] [Accepted: 05/04/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Che-Wei Wang
- Department of Chemistry; National Taiwan University; Taipei Taiwan
| | - Guor-Rong Her
- Department of Chemistry; National Taiwan University; Taipei Taiwan
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15
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Maráková K, Piešt'anský J, Veizerová L, Galba J, Dokupilová S, Havránek E, Mikuš P. Multidrug analysis of pharmaceutical and urine matrices by on-line coupled capillary electrophoresis and triple quadrupole mass spectrometry. J Sep Sci 2013; 36:1805-16. [DOI: 10.1002/jssc.201200980] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 02/27/2013] [Accepted: 03/02/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Katarína Maráková
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Juraj Piešt'anský
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Lucia Veizerová
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Jaroslav Galba
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Svetlana Dokupilová
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Emil Havránek
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Peter Mikuš
- Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
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16
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Kuehnbaum NL, Britz-McKibbin P. New Advances in Separation Science for Metabolomics: Resolving Chemical Diversity in a Post-Genomic Era. Chem Rev 2013; 113:2437-68. [DOI: 10.1021/cr300484s] [Citation(s) in RCA: 201] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Naomi L. Kuehnbaum
- Department of Chemistry
and Chemical Biology, McMaster University, Hamilton, Canada
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17
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Klepárník K. Recent advances in the combination of capillary electrophoresis with mass spectrometry: From element to single-cell analysis. Electrophoresis 2012; 34:70-85. [DOI: 10.1002/elps.201200488] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 10/08/2012] [Accepted: 10/08/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Karel Klepárník
- Institute of Analytical Chemistry; Academy of Sciences of the Czech Republic; Brno; Czech Republic
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18
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Bonvin G, Schappler J, Rudaz S. Capillary electrophoresis–electrospray ionization-mass spectrometry interfaces: Fundamental concepts and technical developments. J Chromatogr A 2012; 1267:17-31. [DOI: 10.1016/j.chroma.2012.07.019] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 07/04/2012] [Accepted: 07/06/2012] [Indexed: 01/24/2023]
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19
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Zhao SS, Zhong X, Tie C, Chen DD. Capillary electrophoresis-mass spectrometry for analysis of complex samples. Proteomics 2012; 12:2991-3012. [DOI: 10.1002/pmic.201200221] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 07/10/2012] [Accepted: 07/18/2012] [Indexed: 12/20/2022]
Affiliation(s)
- Shuai Sherry Zhao
- Department of Chemistry; University of British Columbia; Vancouver BC Canada
| | - Xuefei Zhong
- Department of Chemistry; University of British Columbia; Vancouver BC Canada
| | - Cai Tie
- Department of Chemistry; University of British Columbia; Vancouver BC Canada
| | - David D.Y. Chen
- Department of Chemistry; University of British Columbia; Vancouver BC Canada
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20
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Krenkova J, Foret F. On-line CE/ESI/MS interfacing: recent developments and applications in proteomics. Proteomics 2012; 12:2978-90. [PMID: 22888067 DOI: 10.1002/pmic.201200140] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 05/17/2012] [Accepted: 06/12/2012] [Indexed: 12/13/2022]
Abstract
After shining as the ultimate separation - sequencing technique used for the successful completion of the Human Genome Project, in the early 2000s CE experienced lowered popularity among separation scientists. The renewed interest in recent years relates to the separation needs, especially in proteomics, metabolomics, and glycomics, where CE complements liquid chromatography techniques. This interest is further boosted by the regulators requiring additional separation techniques for characterization of newly developed pharmaceuticals. This paper gives a short overview of recent developments in the on-line interfacing of CE separation techniques with electrospray ionization/mass spectrometric analysis. Both the instrumentation and selected CE/ESI/MS applications including analyses of peptides, proteins, and glycans are discussed with the stress on research published in the past 3 years. Techniques related to the proteomic and glycomic analyses such as sample preconcentration, on-line protein digestion, and analyte derivatization prior CE/ESI/MS analysis are also included.
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Affiliation(s)
- Jana Krenkova
- Institute of Analytical Chemistry of the ASCR, Brno, Czech Republic.
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21
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Palatzky P, Matysik FM. Development and characterization of a novel semiautomated arrangement for electrochemically assisted injection in combination with capillary electrophoresis time-of-flight mass spectrometry. Electrophoresis 2012; 33:2689-94. [DOI: 10.1002/elps.201200088] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Analyzing small samples with high efficiency: capillary batch injection–capillary electrophoresis–mass spectrometry. Anal Bioanal Chem 2012; 404:1713-21. [DOI: 10.1007/s00216-012-6282-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/15/2012] [Accepted: 07/17/2012] [Indexed: 10/28/2022]
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23
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Niegel C, Pfeiffer SA, Grundmann M, Arroyo-Abad U, Mattusch J, Matysik FM. Fast separations by capillary electrophoresis hyphenated to electrospray ionization time-of-flight mass spectrometry as a tool for arsenic speciation analysis. Analyst 2012; 137:1956-62. [DOI: 10.1039/c2an15944a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Oracz J, Nebesny E, Zyżelewicz D. New trends in quantification of acrylamide in food products. Talanta 2011; 86:23-34. [PMID: 22063508 DOI: 10.1016/j.talanta.2011.08.066] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 08/11/2011] [Accepted: 08/28/2011] [Indexed: 12/28/2022]
Abstract
Methods applied in acrylamide quantification in foods have been reviewed in this paper. Novel analytical techniques like capillary electrophoresis (CE), immunoenzymatic test (ELISA) and electrochemical biosensors, which can replace traditional methods like high performance liquid chromatography (HPLC) and gas chromatography (GC) were presented. Short time of analysis and high resolution power of electrophoretic techniques caused that they became routinely used in food analysis apart from high performance liquid chromatography and gas chromatography. Application of modern chromatography methods like ultra performance liquid chromatography (UPLC) in acrylamide quantification considerably shortened the time of analysis and decreased the consumption of indispensable reagents. The most promising approaches to acrylamide quantification in foods are electrochemical biosensors and immunoenzymatic tests. In contrast to chromatography and electrophoretic methods they require neither expensive equipment nor time consuming sample preparation and allow for fast screening of numerous samples without the usage of sophisticated apparatuses. Because of many advantages such as miniaturization, rapid and simple analysis, and high sensitivity and selectivity, biosensors are thought to replace conventional methods of acrylamide quantification in food.
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Affiliation(s)
- Joanna Oracz
- Faculty of Biotechnology and Food Sciences, Technical University of Lodz, 4/10 Stefanowskiego Street, 90-924 Lodz, Poland.
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Grundmann M, Rothenhöfer M, Bernhardt G, Buschauer A, Matysik FM. Fast counter-electroosmotic capillary electrophoresis-time-of-flight mass spectrometry of hyaluronan oligosaccharides. Anal Bioanal Chem 2011; 402:2617-23. [PMID: 21800126 DOI: 10.1007/s00216-011-5254-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 07/10/2011] [Accepted: 07/13/2011] [Indexed: 11/27/2022]
Abstract
Fast capillary electrophoresis-mass spectrometry measurements under counter-electroosmotic analyte migration conditions are presented. Efficient separations of a homologous series of six hyaluronan oligosaccharides (comprising 1-6 hyalobiuronic acid moieties) could be completed in 65 s. Separations were achieved in short-length fused silica capillaries under high electric field strengths of up to 1.25 kV·cm(-1). Capillary inner diameters ranging from 5 to 50 μm were investigated, resulting in an optimal value of 15 μm. The influence of capillary dimensions and buffer composition on separation efficiency and sensitivity are discussed. Optimal separations were achieved using a 28 cm × 15 μm capillary, a separation high voltage of 35 kV, a background electrolyte of 25 mM ammonium acetate adjusted to pH 8.5, and negative ionization mode. The optimized method was successfully applied to a bovine testicular hyaluronidase digest of hyaluronan. Only minimal sample pretreatment for protein-containing samples is required. The simple manual injection procedure and fast separations allow for a sample throughput of 35 samples per hour.
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Affiliation(s)
- Marco Grundmann
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany
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