1
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Gong X, Chen W, Zhang K, Li T, Song Q. Serially coupled column liquid chromatography: An alternative separation tool. J Chromatogr A 2023; 1706:464278. [PMID: 37572536 DOI: 10.1016/j.chroma.2023.464278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/20/2023] [Accepted: 08/02/2023] [Indexed: 08/14/2023]
Abstract
Despite the rapid development of liquid chromatography (LC) in recent decades, it remains a challenge to achieve the desired chromatographic separation of complex matrices using a single column. Multi-column LC techniques, particularly serially coupled column LC (SCC-LC), have emerged as a promising solution to overcome this challenge. While more attention has been focused on heart-cutting or comprehensive two-dimensional LC, reviews specifically focusing on SCC-LC, which offers advantages in terms of precision and facile instrumentation, are scarce. Here, our concerns are devoted to the progress summary regarding the instrumentation and applications of SCC-LC. Emphasis is placed on column selection aiming to enlarge peak capacity, selectivity, or both through the optimization of combination types (e.g. RPLC-RPLC, -RPLC-HILIC, and achiral-chiral LC), connection devices (e.g. zero dead volume connector, tubing, and T-type connector), elution program (i.e. isocratic or gradient) and detectors (e.g. mass spectrometer, ultraviolet detector, and fluorescence detector). The application of SCC-LC in pharmaceutical, biological, environmental, and food fields is also reviewed, and future perspectives and potential directions for SCC-LC are discussed. We envision that the review can give meaningful information to analytical scientists when facing heavy chromatographic separation tasks for complicated matrices.
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Affiliation(s)
- Xingcheng Gong
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Wei Chen
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Ke Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Ting Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Qingqing Song
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China.
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2
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Vanhinsbergh C, Hook EC, Oxby N, Dickman MJ. Optimization of orthogonal separations for the analysis of oligonucleotides using 2D-LC. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1227:123812. [PMID: 37454408 DOI: 10.1016/j.jchromb.2023.123812] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/18/2023]
Abstract
Oligonucleotides are commonly analysed using one dimensional chromatography (1D-LC) to resolve and characterise manufacturing impurities, structural isomers and (in respect to emerging oligonucleotide therapeutics) drug substance and drug product. Due to low selectivity and co-elution of closely related oligonucleotides using 1D-LC, analyte resolution is challenged. This leads to the requirement for improved analytical methods. Multidimensional chromatography has demonstrated utility in a range of applications as it increases peak capacity using orthogonal separations, however there are limited studies demonstrating the 2D-LC analysis of closely related oligonucleotides. In this study we optimised OGN size and sequence based separations using a variety of 1D-LC methods and coupled these orthogonal modes of chromatography within a 2D-LC workflow. Theoretical 2D-LC workflows were evaluated for optimal orthogonality using the minimum convex hull metric. The most orthogonal workflow identified in this study was ion-pair reversed phase using tributylammonium acetate (IP-RP-TBuAA) coupled with strong anion exchange in conjunction with sodium perchlorate (SAX-NaClO4) at high mobile phase pH. We developed a heart-cut (IP-RP-TBuAA)-(SAX-NaClO4) 2D-LC method for analysis of closely related size and sequence variant OGNs and OGN manufacturing impurities. The 2D-LC method resulted in an increased orthogonality and a reduction in co-elution (or close elution). Application of a UV based reference mapping strategy in conjunction with the 2D-LC method demonstrated a reduction in analytical complexity by reducing the reliance on mass based detection methods.
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Affiliation(s)
- Christina Vanhinsbergh
- Department of Chemical and Biological Engineering, Mappin Street, University of Sheffield, S1 3JD, UK
| | - Elliot C Hook
- GlaxoSmithKline, GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts SG1 2NY, UK
| | - Nicola Oxby
- GlaxoSmithKline, GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts SG1 2NY, UK
| | - Mark J Dickman
- Department of Chemical and Biological Engineering, Mappin Street, University of Sheffield, S1 3JD, UK.
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3
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Abdulhussain N, Nawada S, Schoenmakers P. Latest Trends on the Future of Three-Dimensional Separations in Chromatography. Chem Rev 2021; 121:12016-12034. [PMID: 33878259 PMCID: PMC8517953 DOI: 10.1021/acs.chemrev.0c01244] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Indexed: 12/26/2022]
Abstract
Separation and characterization of complex mixtures are of crucial importance in many fields, where extremely high separation power is required. Three-dimensional separation techniques can offer a path toward achieving high peak capacities. In this Review, online three-dimensional separation systems are discussed, including three-dimensional gas chromatography, and hyphenated combinations of two-dimensional gas chromatography with liquid chromatography or supercritical-fluid chromatography. Online comprehensive two-dimensional liquid chromatography provides detailed information on complex samples and the need for higher peak capacities is pushing researchers toward online three-dimensional liquid chromatography. In this review, an overview of the various combinations are provided and we discuss and compare their potential performance, advantages, perspectives, and results obtained during the most recent 10-15 years. Finally, the Review will discuss a novel approach of spatial three-dimensional liquid separation to increase peak capacity.
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Affiliation(s)
- Noor Abdulhussain
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park, 1098 XH, Amsterdam, The Netherlands
- The
Centre for Analytical Sciences Amsterdam (CASA), University of Amsterdam, 1098 XH, Amsterdam, The Netherlands
| | - Suhas Nawada
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park, 1098 XH, Amsterdam, The Netherlands
- The
Centre for Analytical Sciences Amsterdam (CASA), University of Amsterdam, 1098 XH, Amsterdam, The Netherlands
| | - Peter Schoenmakers
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park, 1098 XH, Amsterdam, The Netherlands
- The
Centre for Analytical Sciences Amsterdam (CASA), University of Amsterdam, 1098 XH, Amsterdam, The Netherlands
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4
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Grübner M, Dunkel A, Steiner F, Hofmann T. Systematic Evaluation of Liquid Chromatography (LC) Column Combinations for Application in Two-Dimensional LC Metabolomic Studies. Anal Chem 2021; 93:12565-12573. [PMID: 34491041 DOI: 10.1021/acs.analchem.1c01857] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In comparison to proteomics, the application of two-dimensional liquid chromatography (2D LC) in the field of metabolomics is still premature. One reason might be the elevated chemical complexity and the associated challenge of selecting proper separation conditions in each dimension. As orthogonality of dimensions is a major issue, the present study aimed for the identification of successful stationary phase combinations. To determine the degree of orthogonality, first, six different metrics, namely, Pearson's correlation coefficient (1 - |R|), the nearest-neighbor distances (H̅NND), the "asterisk equations" (AO), and surface coverage by bins (SCG), convex hulls (SCCH), and α-convex hulls (SCαH), were critically assessed by 15 artificial 2D data sets, and a systematic parameter optimization of α-convex hulls was conducted. SGG, SCαH with α = 0.1, and H̅NND generated valid results with sensitivity toward space utilization and data distribution and, therefore, were applied to pairs of experimental retention time sets obtained for >350 metabolites, selected to represent the chemical space of human urine. Normalized retention data were obtained for 23 chromatographic setups, comprising reversed-phase (RP), hydrophilic interaction liquid chromatography (HILIC), and mixed-mode separation systems with an ion exchange (IEX) contribution. As expected, no single LC setting provided separation of all considered analytes, but while conventional RP×HILIC combinations appeared rather complementary than orthogonal, the incorporation of IEX properties into the RP dimension substantially increased the 2D potential. Eventually, one of the most promising column combinations was implemented for an offline 2D LC time-of-flight mass spectrometry analysis of a lyophilized urine sample. Targeted screening resulted in a total of 164 detected metabolites and confirmed the outstanding coverage of the 2D retention space.
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Affiliation(s)
- Maria Grübner
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Straße 34, Freising 85354, Germany.,Thermo Fisher Scientific, Dornierstraße 4, Germering 82110, Germany
| | - Andreas Dunkel
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Straße 34, Freising 85354, Germany.,Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Straße 34, Freising 85354, Germany
| | - Frank Steiner
- Thermo Fisher Scientific, Dornierstraße 4, Germering 82110, Germany
| | - Thomas Hofmann
- Chair of Food Chemistry and Molecular Sensory Science, Technical University of Munich, Lise-Meitner-Straße 34, Freising 85354, Germany
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5
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Chapel S, Heinisch S. Strategies to circumvent the solvent strength mismatch problem in online comprehensive two-dimensional liquid chromatography. J Sep Sci 2021; 45:7-26. [PMID: 34525266 DOI: 10.1002/jssc.202100534] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/23/2021] [Accepted: 08/24/2021] [Indexed: 11/09/2022]
Abstract
On-line comprehensive two-dimensional liquid chromatography is a powerful technique for the separation of highly complex samples. Due to the addition of the second dimension of separation, impressive peak capacities can be obtained within a reasonable analysis time compared to one-dimensional liquid chromatography. In online comprehensive two-dimensional liquid chromatography, the separation power is maximized by selecting two separation dimensions as orthogonal as possible, which most often requires the combination of different mobile phases and stationary phases. The online transfer of a given solvent from the first dimension to the second dimension may cause severe injection effects in the second dimension, mostly due to solvent strength mismatch. Those injection effects may include peak broadening, peak distortion, peak splitting or breakthrough phenomenon. They are often found to reduce significantly the peak capacity and the peak intensity. To overcome such effects, arising specifically in online comprehensive two-dimensional liquid chromatography, different methods have been developed over the years. In this review, we focused on the most recently reported ones. A critical discussion, supported by a theoretical approach, gives an overview of their advantages and drawbacks.
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Affiliation(s)
- Soraya Chapel
- Université de Lyon, Institut des sciences analytiques, Villeurbanne, France
| | - Sabine Heinisch
- Université de Lyon, Institut des sciences analytiques, Villeurbanne, France
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6
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Chapel S, Rouvière F, Heinisch S. Comparison of existing strategies for keeping symmetrical peaks in on-line Hydrophilic Interaction Liquid Chromatography x Reversed-Phase Liquid Chromatography despite solvent strength mismatch. J Chromatogr A 2021; 1642:462001. [PMID: 33684873 DOI: 10.1016/j.chroma.2021.462001] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 12/23/2022]
Abstract
In two-dimensional liquid chromatography, the combination of hydrophilic interaction liquid chromatography (HILIC) and reversed-phase liquid chromatography (RPLC) is very attractive due to the complementarity of their separation mechanisms. On-line comprehensive HILIC x RPLC is well-known to give rise to a large retention space coverage when dealing with ionisable compounds. However, method development in on-line HILIC x RPLC is challenging due to the reversed solvent strength between both dimensions, which can greatly affect the peak shapes in the second RPLC dimension, and thus the separation quality and the method sensitivity. In the present contribution, we compared four strategies designed to avoid this problem: (1) flow splitting, which consists in reducing the injection volume in the second dimension (2D), (2) on-line dilution with a make-up flow and (3) on-line dilution with Active Solvent Modulation (ASM), which both consist in reducing the solvent strength of the injected fractions, and (4) Total Breakthrough Strategy, which we recently proposed. Unlike the three preceding strategies, this latter one consists in injecting large volumes of strong solvent in 2D. The performance of each strategy was evaluated for sub-hour separations of a tryptic digest in on-line HILIC x RPLC. In this work, we considered the critical case for which the same column internal diameters (i.e. 2.1 mm here) are used in both dimensions. Peak capacity, peak shapes and peak intensities were considered for this evaluation. The highest peak capacity could be achieved with Total Breakthrough Strategy while the lowest one with on-line dilution using ASM. Peak intensities were usually higher with on-line dilution approaches (make-up flow and ASM). However, despite the presence of breakthrough, peak intensities were approximately 7-fold higher with Total Breakthrough Strategy than with flow splitting.
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Affiliation(s)
- Soraya Chapel
- Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, 5 rue de la Doua, 69100, Villeurbanne, France
| | - Florent Rouvière
- Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, 5 rue de la Doua, 69100, Villeurbanne, France
| | - Sabine Heinisch
- Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, 5 rue de la Doua, 69100, Villeurbanne, France.
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7
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Kaplitz AS, Mostafa ME, Calvez SA, Edwards JL, Grinias JP. Two‐dimensional separation techniques using supercritical fluid chromatography. J Sep Sci 2020; 44:426-437. [DOI: 10.1002/jssc.202000823] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/17/2020] [Accepted: 10/06/2020] [Indexed: 02/05/2023]
Affiliation(s)
| | | | - Samantha A. Calvez
- Department of Chemistry & Biochemistry Rowan University Glassboro NJ USA
| | | | - James P. Grinias
- Department of Chemistry & Biochemistry Rowan University Glassboro NJ USA
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8
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Wang L, Marcus RK. Polypropylene capillary-channeled polymer fiber column as the second dimension in a comprehensive two-dimensional RP × RP analysis of a mixture of intact proteins. Anal Bioanal Chem 2020; 412:2963-2979. [DOI: 10.1007/s00216-020-02539-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 02/17/2020] [Accepted: 02/20/2020] [Indexed: 10/24/2022]
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9
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Baghdady YZ, Schug KA. Online Comprehensive High pH Reversed Phase × Low pH Reversed Phase Approach for Two-Dimensional Separations of Intact Proteins in Top-Down Proteomics. Anal Chem 2019; 91:11085-11091. [PMID: 31366196 DOI: 10.1021/acs.analchem.9b01665] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A proof-of-concept study is presented on the use of comprehensive two-dimensional liquid chromatography mass spectrometry (LC × LC-MS) for the separation of intact protein mixtures using a different mobile phase pH in each dimension. This system utilizes mass spectrometry (MS) friendly pH modifiers for the online coupling of high pH reversed phase liquid chromatography (HPH-RPLC) in the first dimension (1D) followed by low pH reversed phase liquid chromatography (LPH-RPLC) in the second dimension (2D). Owing to the ionic nature of proteins, the use of a different mobile phase pH was successful to provide altered selectivity between the two dimensions, even for closely related protein variants, such as bovine cytochrome c and equine cytochrome c, which differ by only three amino acids. Subminute gradient separation of proteins in the second dimension was successful to minimize analysis time, while maintaining high peak capacity. Unlike peptides, the elution order of studied proteins did not follow their isoelectric points, where acidic proteins would be expected to be more retained at low pH (and basic proteins at high pH). The steep elution isotherms (on-off retention mechanism) of proteins and the very steep gradients utilized in the second-dimension column succeeded in overcoming pH and organic solvent content mismatch. The utility of the system was demonstrated with a mixture of protein standards and an Escherichia coli protein mixture.
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Affiliation(s)
- Yehia Z Baghdady
- Department of Chemistry & Biochemistry , The University of Texas Arlington , Arlington , Texas 76019-0065 , United States
| | - Kevin A Schug
- Department of Chemistry & Biochemistry , The University of Texas Arlington , Arlington , Texas 76019-0065 , United States
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10
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Comprehensive two-dimensional liquid chromatography of heavy oil. J Chromatogr A 2018; 1564:110-119. [DOI: 10.1016/j.chroma.2018.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 06/01/2018] [Accepted: 06/03/2018] [Indexed: 11/22/2022]
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11
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Baglai A, Blokland MH, Mol HG, Gargano AF, van der Wal S, Schoenmakers PJ. Enhancing detectability of anabolic-steroid residues in bovine urine by actively modulated online comprehensive two-dimensional liquid chromatography – high-resolution mass spectrometry. Anal Chim Acta 2018; 1013:87-97. [DOI: 10.1016/j.aca.2017.12.043] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/17/2017] [Accepted: 12/29/2017] [Indexed: 11/26/2022]
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12
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Baglai A, Gargano AF, Jordens J, Mengerink Y, Honing M, van der Wal S, Schoenmakers PJ. Comprehensive lipidomic analysis of human plasma using multidimensional liquid- and gas-phase separations: Two-dimensional liquid chromatography–mass spectrometry vs. liquid chromatography–trapped-ion-mobility–mass spectrometry. J Chromatogr A 2017; 1530:90-103. [DOI: 10.1016/j.chroma.2017.11.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 11/06/2017] [Accepted: 11/09/2017] [Indexed: 01/04/2023]
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13
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Pirok BWJ, Gargano AFG, Schoenmakers PJ. Optimizing separations in online comprehensive two-dimensional liquid chromatography. J Sep Sci 2017; 41:68-98. [PMID: 29027363 PMCID: PMC5814945 DOI: 10.1002/jssc.201700863] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/21/2017] [Accepted: 09/21/2017] [Indexed: 12/16/2022]
Abstract
Online comprehensive two-dimensional liquid chromatography has become an attractive option for the analysis of complex nonvolatile samples found in various fields (e.g. environmental studies, food, life, and polymer sciences). Two-dimensional liquid chromatography complements the highly popular hyphenated systems that combine liquid chromatography with mass spectrometry. Two-dimensional liquid chromatography is also applied to the analysis of samples that are not compatible with mass spectrometry (e.g. high-molecular-weight polymers), providing important information on the distribution of the sample components along chemical dimensions (molecular weight, charge, lipophilicity, stereochemistry, etc.). Also, in comparison with conventional one-dimensional liquid chromatography, two-dimensional liquid chromatography provides a greater separation power (peak capacity). Because of the additional selectivity and higher peak capacity, the combination of two-dimensional liquid chromatography with mass spectrometry allows for simpler mixtures of compounds to be introduced in the ion source at any given time, improving quantitative analysis by reducing matrix effects. In this review, we summarize the rationale and principles of two-dimensional liquid chromatography experiments, describe advantages and disadvantages of combining different selectivities and discuss strategies to improve the quality of two-dimensional liquid chromatography separations.
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Affiliation(s)
- Bob W J Pirok
- University of Amsterdam, Analytical-Chemistry Group, van 't Hoff Institute for Molecular Sciences, Amsterdam, The Netherlands.,TI-COAST, Science Park, Amsterdam, The Netherlands
| | - Andrea F G Gargano
- University of Amsterdam, Analytical-Chemistry Group, van 't Hoff Institute for Molecular Sciences, Amsterdam, The Netherlands.,Vrije Universiteit Amsterdam, Department of Bioanalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Systems, Amsterdam, The Netherlands
| | - Peter J Schoenmakers
- University of Amsterdam, Analytical-Chemistry Group, van 't Hoff Institute for Molecular Sciences, Amsterdam, The Netherlands
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14
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Stütz L, Weiss SC, Schulz W, Schwack W, Winzenbacher R. Selective two-dimensional effect-directed analysis with thin-layer chromatography. J Chromatogr A 2017; 1524:273-282. [PMID: 29031972 DOI: 10.1016/j.chroma.2017.10.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 08/17/2017] [Accepted: 10/04/2017] [Indexed: 01/12/2023]
Abstract
There are thousands of organic trace substances in the environment that are not fully characterized, and evaluation of their relevance to the ecosystem is difficult. Effect-directed analysis (EDA) is a suitable tool to assess the effects of a substance via in-vitro bioassays, which can provide information about the relevance of the substance. High-performance thin-layer chromatography (HPTLC) has been shown to be a good method for fractionation. Environmental samples, however, often have high complexity, which is why the peak capacity of HPTLC is not sufficient. Therefore, this study focused on the development of selective two-dimensional (2D) HPTLC-EDA to increase the peak capacity and facilitate the identification of effective compounds. Thus, only effective zones were selected in the first dimension in terms of heart-cutting and were transferred to the second dimension through elution head-based extraction. Three 2D approaches were developed and validated. The best results in terms of peak capacity and orthogonality were achieved when the retardation factors of the first dimension were used to adjust the mobile phase (MP) for the second dimension. Applying the acetylcholinesterase (AChE) inhibition assay as an example EDA, analysis of spiked surface water by 2D HPTLC-EDA allowed zones with neurotoxic effects to responsible substances to be assigned. The 2D separation reduced the complexity of effective zones and thus facilitated the subsequent identification of effective compounds. Knowledge about a substancés effects enabled assessment of its relevance to the environment.
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Affiliation(s)
- Lena Stütz
- Laboratory for Operation Control and Research, Zweckverband Landeswasserversorgung, Am spitzigen Berg 1, 89129 Langenau, Germany; Institute of Food Chemistry, University of Hohenheim, Garbenstraße 28, 70599 Stuttgart, Germany.
| | - Stefan C Weiss
- Laboratory for Operation Control and Research, Zweckverband Landeswasserversorgung, Am spitzigen Berg 1, 89129 Langenau, Germany.
| | - Wolfgang Schulz
- Laboratory for Operation Control and Research, Zweckverband Landeswasserversorgung, Am spitzigen Berg 1, 89129 Langenau, Germany.
| | - Wolfgang Schwack
- Institute of Food Chemistry, University of Hohenheim, Garbenstraße 28, 70599 Stuttgart, Germany.
| | - Rudi Winzenbacher
- Laboratory for Operation Control and Research, Zweckverband Landeswasserversorgung, Am spitzigen Berg 1, 89129 Langenau, Germany.
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15
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Jakobsen SS, Christensen JH, Verdier S, Mallet CR, Nielsen NJ. Increasing Flexibility in Two-Dimensional Liquid Chromatography by Pulsed Elution of the First Dimension: A Proof of Concept. Anal Chem 2017; 89:8723-8730. [DOI: 10.1021/acs.analchem.7b00758] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Simon S. Jakobsen
- Department
of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
- Haldor Topsoe A/S, Haldor Topsøes
Allé 1, DK-2800 Kongens Lyngby, Denmark
| | - Jan H. Christensen
- Department
of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Sylvain Verdier
- Haldor Topsoe A/S, Haldor Topsøes
Allé 1, DK-2800 Kongens Lyngby, Denmark
| | - Claude R. Mallet
- Waters Corporation, 34 Maple Street, Milford, Massachusetts 01757, United States
| | - Nikoline J. Nielsen
- Department
of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
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16
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Sarrut M, Rouvière F, Heinisch S. Theoretical and experimental comparison of one dimensional versus on-line comprehensive two dimensional liquid chromatography for optimized sub-hour separations of complex peptide samples. J Chromatogr A 2017; 1498:183-195. [DOI: 10.1016/j.chroma.2017.01.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 01/11/2017] [Accepted: 01/22/2017] [Indexed: 01/15/2023]
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17
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Validation of a two-dimensional liquid chromatography method for quality control testing of pharmaceutical materials. J Chromatogr A 2017; 1492:89-97. [PMID: 28284763 DOI: 10.1016/j.chroma.2017.02.074] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 02/26/2017] [Accepted: 02/28/2017] [Indexed: 11/22/2022]
Abstract
Despite the advantages of 2D-LC, there is currently little to no work in demonstrating the suitability of these 2D-LC methods for use in a quality control (QC) environment for good manufacturing practice (GMP) tests. This lack of information becomes more critical as the availability of commercial 2D-LC instrumentation has significantly increased, and more testing facilities begin to acquire these 2D-LC capabilities. It is increasingly important that the transferability of developed 2D-LC methods be assessed in terms of reproducibility, robustness and performance across different laboratories worldwide. The work presented here focuses on the evaluation of a heart-cutting 2D-LC method used for the analysis of a pharmaceutical material, where a key, co-eluting impurity in the first dimension (1D) is resolved from the main peak and analyzed in the second dimension (2D). A design-of-experiments (DOE) approach was taken in the collection of the data, and the results were then modeled in order to evaluate method robustness using statistical modeling software. This quality by design (QBD) approach gives a deeper understanding of the impact of these 2D-LC critical method attributes (CMAs) and how they affect overall method performance. Although there are multiple parameters that may be critical from method development point of view, a special focus of this work is devoted towards evaluation of unique 2D-LC critical method attributes from method validation perspective that transcend conventional method development and validation. The 2D-LC method attributes are evaluated for their recovery, peak shape, and resolution of the two co-eluting compounds in question on the 2D. In the method, linearity, accuracy, precision, repeatability, and sensitivity are assessed along with day-to-day, analyst-to-analyst, and lab-to-lab (instrument-to-instrument) assessments. The results of this validation study demonstrate that the 2D-LC method is accurate, sensitive, and robust and is ultimately suitable for QC testing with good method transferability.
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18
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Ranjbar L, Foley JP, Breadmore MC. Multidimensional liquid-phase separations combining both chromatography and electrophoresis – A review. Anal Chim Acta 2017; 950:7-31. [DOI: 10.1016/j.aca.2016.10.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 10/17/2016] [Accepted: 10/20/2016] [Indexed: 01/31/2023]
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19
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Česla P, Křenková J. Fraction transfer process in on-line comprehensive two-dimensional liquid-phase separations. J Sep Sci 2016; 40:109-123. [DOI: 10.1002/jssc.201600921] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 11/15/2016] [Accepted: 11/20/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Petr Česla
- Faculty of Chemical Technology, Department of Analytical Chemistry; University of Pardubice; Pardubice Czech Republic
| | - Jana Křenková
- Institute of Analytical Chemistry of the CAS; v.v.i.; Brno Czech Republic
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20
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Affiliation(s)
- Dwight R. Stoll
- Department
of Chemistry, Gustavus Adolphus College, Saint Peter, Minnesota 56082, United States
| | - Peter W. Carr
- Department
of Chemistry, University of Minnesota, Minneapolis, Minnesota 55104, United States
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21
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Gargano AFG, Duffin M, Navarro P, Schoenmakers PJ. Reducing Dilution and Analysis Time in Online Comprehensive Two-Dimensional Liquid Chromatography by Active Modulation. Anal Chem 2016; 88:1785-93. [PMID: 26709410 PMCID: PMC5373567 DOI: 10.1021/acs.analchem.5b04051] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 12/28/2015] [Indexed: 12/19/2022]
Abstract
Online comprehensive two-dimensional liquid chromatography (LC × LC) offers ways to achieve high-performance separations in terms of peak capacity (exceeding 1000) and additional selectivity to realize applications that cannot be addressed with one-dimensional chromatography (1D-LC). However, the greater resolving power of LC × LC comes at the price of higher dilutions (thus, reduced sensitivity) and, often, long analysis times (>100 min). The need to preserve the separation attained in the first dimension ((1)D) causes greater dilution for LC × LC, in comparison with 1D-LC, and long analysis times to sample the (1)D with an adequate number of second dimension separations. A way to significantly reduce these downsides is to introduce a concentration step between the two chromatographic dimensions. In this work we present a possible active-modulation approach to concentrate the fractions of (1)D effluent. A typical LC × LC system is used with the addition of a dilution flow to decrease the strength of the (1)D effluent and a modulation unit that uses trap columns. The potential of this approach is demonstrated for the separation of tristyrylphenol ethoxylate phosphate surfactants, using a combination of hydrophilic interaction and reversed-phase liquid chromatography. The modified LC × LC system enabled us to halve the analysis time necessary to obtain a similar degree of separation efficiency with respect to UHPLC based LC × LC and of 5 times with respect to HPLC instrumentation (40 compared with 80 and 200 min, respectively), while at the same time reducing dilution (DF of 142, 299, and 1529, respectively) and solvent consumption per analysis (78, 120, and 800 mL, respectively).
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Affiliation(s)
- Andrea F. G. Gargano
- TI-COAST, Van
’t Hoff Institute for Molecular Sciences, Science Park 904, 1098 XH Amsterdam, Netherlands
- Van ’t
Hoff Institute for Molecular Sciences, Science Park 904 1098 XH Amsterdam, Netherlands
| | - Mike Duffin
- Syngenta, Jealott’s
Hill International Research Centre, Bracknell,
Berkshire RG42 6EY, United
Kingdom
| | - Pablo Navarro
- Syngenta, Jealott’s
Hill International Research Centre, Bracknell,
Berkshire RG42 6EY, United
Kingdom
| | - Peter J. Schoenmakers
- Van ’t
Hoff Institute for Molecular Sciences, Science Park 904 1098 XH Amsterdam, Netherlands
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22
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Abstract
This article summarizes the most important developments in the use of 2D-LC for bioanalysis in the last 5 years. While several interesting and powerful applications have been developed recently, this work has been supported by continued, significant development of theoretical concepts, instrument development and practical aspects of method development. Some of the most exciting applications have been focused on the use of 2D-LC and characterize proteins both as biotherapeutic drug substances, and in formulations. These materials are inherently complex, difficult to resolve chromatographically and present problems that are essentially unknown (e.g., aggregation) in the small molecule world, thus 2D-LC can be leveraged very effectively to address these challenges.
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Sarrut M, D’Attoma A, Heinisch S. Optimization of conditions in on-line comprehensive two-dimensional reversed phase liquid chromatography. Experimental comparison with one-dimensional reversed phase liquid chromatography for the separation of peptides. J Chromatogr A 2015; 1421:48-59. [DOI: 10.1016/j.chroma.2015.08.052] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 08/24/2015] [Accepted: 08/25/2015] [Indexed: 11/28/2022]
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24
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Protocols for finding the most orthogonal dimensions for two-dimensional high performance liquid chromatography. Talanta 2015; 134:402-408. [DOI: 10.1016/j.talanta.2014.11.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 11/17/2014] [Accepted: 11/18/2014] [Indexed: 11/24/2022]
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25
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Horváth K, Sepsey A, Hajós P. Solvent minimization in two-dimensional liquid chromatography. J Chromatogr A 2015; 1378:32-6. [PMID: 25555411 DOI: 10.1016/j.chroma.2014.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 11/10/2014] [Accepted: 12/01/2014] [Indexed: 11/16/2022]
Abstract
An algorithm was developed for the minimization of consumption of organic solvent in comprehensive two-dimensional liquid chromatography (2DLC). It was shown that one can reach higher peak capacities only by using more eluent. The equilibration volume of the second dimension, however, did not affect the solvent consumption significantly. Calculations confirmed that the same target peak capacity could be achieved by consuming significantly different volume of organic modifier depending on the number of fractions analyzed in the second dimension suggesting that 2D separations can be optimized for eluent consumption. It was shown that minimization of eluent usage requires the use of small and high efficient columns in the second dimension. A simple equation was derived for the calculation of the optimal number of collected fractions from the first dimension that allowed the minimization of eluent usage, cost and environmental impact of comprehensive 2DLC separations.
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Affiliation(s)
- Krisztián Horváth
- Department of Analytical Chemistry, University of Pannonia, Egyetem utca 10, H-8200 Veszprém, Hungary.
| | - Annamária Sepsey
- MTA-PTE Molecular Interactions in Separation Science Research Group, Ifjúság útja 6, H-7624 Pécs, Hungary
| | - Péter Hajós
- Department of Analytical Chemistry, University of Pannonia, Egyetem utca 10, H-8200 Veszprém, Hungary
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27
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Stoll DR, Talus ES, Harmes DC, Zhang K. Evaluation of detection sensitivity in comprehensive two-dimensional liquid chromatography separations of an active pharmaceutical ingredient and its degradants. Anal Bioanal Chem 2014; 407:265-77. [DOI: 10.1007/s00216-014-8036-9] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/11/2014] [Accepted: 07/14/2014] [Indexed: 12/01/2022]
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Geiger M, Frost NW, Bowser MT. Comprehensive Multidimensional Separations of Peptides Using Nano-Liquid Chromatography Coupled with Micro Free Flow Electrophoresis. Anal Chem 2014; 86:5136-42. [DOI: 10.1021/ac500939q] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Matthew Geiger
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
| | - Nicholas W. Frost
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
| | - Michael T. Bowser
- Department of Chemistry, University of Minnesota, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
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29
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Horie K, Kamakura T, Ikegami T, Wakabayashi M, Kato T, Tanaka N, Ishihama Y. Hydrophilic Interaction Chromatography Using a Meter-Scale Monolithic Silica Capillary Column for Proteomics LC-MS. Anal Chem 2014; 86:3817-24. [DOI: 10.1021/ac4038625] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kanta Horie
- Eisai Co., Ltd, Pharmaceutical Science and Technology
Core Function Unit, Global Formulation Research, Kawashima, Kakamigahara, Gifu 501-6195, Japan
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
| | - Takeo Kamakura
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
| | - Tohru Ikegami
- Department
of Biomolecular Engineering, Kyoto Institute of Technology, Sakyo-ku, Kyoto, Kyoto 606-8585, Japan
| | - Masaki Wakabayashi
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
| | - Takashi Kato
- Eisai Co., Ltd, Pharmaceutical Science and Technology
Core Function Unit, Global Formulation Research, Kawashima, Kakamigahara, Gifu 501-6195, Japan
| | - Nobuo Tanaka
- Department
of Biomolecular Engineering, Kyoto Institute of Technology, Sakyo-ku, Kyoto, Kyoto 606-8585, Japan
- GL Sciences Inc., 237-2
Sayamagahara, Iruma, Saitama 358-0032, Japan
| | - Yasushi Ishihama
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan
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30
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Combining liquid chromatography with multiplexed capillary gel electrophoresis for offline comprehensive analysis of complex oligonucleotide samples. J Chromatogr A 2014; 1336:87-93. [PMID: 24582393 DOI: 10.1016/j.chroma.2014.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 01/23/2014] [Accepted: 02/01/2014] [Indexed: 11/20/2022]
Abstract
Offline two dimensional liquid chromatography (LC)×capillary gel electrophoresis (CGE) and LC×(24) multiplexed-CGE methodologies were developed for the separation of oligonucleotides of therapeutic size. Both ion-pair chromatography (IPC) and ion-exchange chromatography (IEC) were studied as methods for the first dimension and single and multiplexed capillary electrophoresis methods in entangled polymer solutions were used for the second dimension separations. Electrokinetic and pressure injection were evaluated for the analysis of the collected LC fractions. The comprehensive separation was optimized with standard mixtures of poly adenosine, thymidine, cytosine and uracil homodeoxyoligonucleotides up to 35 bases long. Highly orthogonal methodologies and overall peak capacities of 6435 and 6993 for IPC×CGE and IEC×CGE, respectively, were obtained within a few hours analysis time.
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31
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Kalili KM, Vestner J, Stander MA, de Villiers A. Toward Unraveling Grape Tannin Composition: Application of Online Hydrophilic Interaction Chromatography × Reversed-Phase Liquid Chromatography–Time-of-Flight Mass Spectrometry for Grape Seed Analysis. Anal Chem 2013; 85:9107-15. [DOI: 10.1021/ac401896r] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kathithileni M. Kalili
- Stellenbosch University, Department of Chemistry and
Polymer Science, Private Bag X1, Matieland, Stellenbosch, Western Cape 7602, South Africa
| | - Jochen Vestner
- Stellenbosch University, Department of Chemistry and
Polymer Science, Private Bag X1, Matieland, Stellenbosch, Western Cape 7602, South Africa
- Hochschule Geisenheim University, Center of Analytical
Chemistry and Microbiology, Department of Microbiology and Biochemistry, Von-Lade-Str. 1, 65366 Geisenheim, Germany
| | - Maria A. Stander
- Stellenbosch University, Central Analytical Facility, Private Bag X1, Matieland, Stellenbosch, Western Cape 7602, South Africa
- Stellenbosch University, Department of Biochemistry, Private Bag X1, Matieland, Stellenbosch, Western Cape 7602, South Africa
| | - André de Villiers
- Stellenbosch University, Department of Chemistry and
Polymer Science, Private Bag X1, Matieland, Stellenbosch, Western Cape 7602, South Africa
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32
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Liu Q, Jiang X, Zheng H, Su W, Chen X, Yang H. On-line two-dimensional LC: A rapid and efficient method for the determination of enantiomeric excess in reaction mixtures. J Sep Sci 2013; 36:3158-64. [DOI: 10.1002/jssc.201300412] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 06/26/2013] [Accepted: 07/07/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Qi Liu
- School of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Xinyu Jiang
- School of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
- Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University; Changsha P.R. China
| | - Haixing Zheng
- School of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Wen Su
- School of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
| | - Xiaoqing Chen
- School of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
- Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University; Changsha P.R. China
| | - Hua Yang
- School of Chemistry and Chemical Engineering; Central South University; Changsha P.R. China
- Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University; Changsha P.R. China
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33
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Kalili KM, de Villiers A. Systematic optimisation and evaluation of on-line, off-line and stop-flow comprehensive hydrophilic interaction chromatography×reversed phase liquid chromatographic analysis of procyanidins, Part I: Theoretical considerations. J Chromatogr A 2013; 1289:58-68. [DOI: 10.1016/j.chroma.2013.03.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 02/13/2013] [Accepted: 03/08/2013] [Indexed: 02/04/2023]
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34
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Larson ED, Groskreutz SR, Harmes DC, Gibbs-Hall IC, Trudo SP, Allen RC, Rutan SC, Stoll DR. Development of selective comprehensive two-dimensional liquid chromatography with parallel first-dimension sampling and second-dimension separation—application to the quantitative analysis of furanocoumarins in apiaceous vegetables. Anal Bioanal Chem 2013; 405:4639-53. [DOI: 10.1007/s00216-013-6758-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 12/21/2012] [Accepted: 01/16/2013] [Indexed: 12/31/2022]
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35
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Jandera P, Hájek T, Staňková M, Vyňuchalová K, Česla P. Optimization of comprehensive two-dimensional gradient chromatography coupling in-line hydrophilic interaction and reversed phase liquid chromatography. J Chromatogr A 2012; 1268:91-101. [DOI: 10.1016/j.chroma.2012.10.041] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 10/17/2012] [Accepted: 10/18/2012] [Indexed: 10/27/2022]
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36
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Zhu Y, Zhang L, Qian J, Gao F, Ma F, Zhang W. Theoretical and experimental investigations on migration behavior of weak monoprotic acids in continuous two-dimensional ion exchange/reversed phase CEC. Electrophoresis 2012; 33:3028-35. [DOI: 10.1002/elps.201200207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 07/16/2012] [Accepted: 07/17/2012] [Indexed: 11/11/2022]
Affiliation(s)
| | - Lingyi Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai; P. R. China
| | - Junhong Qian
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai; P. R. China
| | - Fangyuan Gao
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai; P. R. China
| | - Fei Ma
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai; P. R. China
| | - Weibing Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai; P. R. China
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37
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Programmed elution in comprehensive two-dimensional liquid chromatography. J Chromatogr A 2012; 1255:112-29. [DOI: 10.1016/j.chroma.2012.02.071] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 02/23/2012] [Accepted: 02/24/2012] [Indexed: 11/23/2022]
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38
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Beelders T, Kalili KM, Joubert E, de Beer D, de Villiers A. Comprehensive two-dimensional liquid chromatographic analysis of rooibos (Aspalathus linearis
) phenolics. J Sep Sci 2012; 35:1808-20. [DOI: 10.1002/jssc.201200060] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Theresa Beelders
- Department of Food Science; Stellenbosch University; Matieland South Africa
| | - Kathithileni M. Kalili
- Department of Chemistry and Polymer Science; Stellenbosch University; Matieland South Africa
| | - Elizabeth Joubert
- Department of Food Science; Stellenbosch University; Matieland South Africa
- Post-Harvest and Wine Technology Division; Agricultural Research Council Infruitec-Nietvoorbij; Stellenbosch South Africa
| | - Dalene de Beer
- Post-Harvest and Wine Technology Division; Agricultural Research Council Infruitec-Nietvoorbij; Stellenbosch South Africa
| | - André de Villiers
- Department of Chemistry and Polymer Science; Stellenbosch University; Matieland South Africa
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39
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Bedani F, Schoenmakers PJ, Janssen HG. Theories to support method development in comprehensive two-dimensional liquid chromatography - A review. J Sep Sci 2012; 35:1697-711. [DOI: 10.1002/jssc.201200070] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Filippo Bedani
- Analytical-Chemistry Group,; Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Amsterdam The Netherlands
- Key Laboratory of Separation Science for Analytical Chemistry,; National Chromatographic Research and Analysis Center,; Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian China
| | - Peter J. Schoenmakers
- Analytical-Chemistry Group,; Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Amsterdam The Netherlands
| | - Hans-Gerd Janssen
- Analytical-Chemistry Group,; Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Amsterdam The Netherlands
- Unilever Research and Development; Advanced Measurement and Data Modelling; Vlaardingen The Netherlands
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40
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Hájek T, Jandera P. Columns and optimum gradient conditions for fast second-dimension separations in comprehensive two-dimensional liquid chromatography. J Sep Sci 2012; 35:1712-22. [DOI: 10.1002/jssc.201200061] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tomáš Hájek
- Department of Analytical Chemistry; University of Pardubice; Pardubice Czech Republic
| | - Pavel Jandera
- Department of Analytical Chemistry; University of Pardubice; Pardubice Czech Republic
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41
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Dück R, Sonderfeld H, Schmitz OJ. A simple method for the determination of peak distribution in comprehensive two-dimensional liquid chromatography. J Chromatogr A 2012; 1246:69-75. [DOI: 10.1016/j.chroma.2012.02.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 02/08/2012] [Accepted: 02/09/2012] [Indexed: 11/26/2022]
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42
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Comprehensive two-dimensional liquid chromatography — practical impacts of theoretical considerations. A review. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0036-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractA theory of comprehensive two-dimensional separations by liquid chromatographic techniques is overviewed. It includes heart-cutting and comprehensive two-dimensional separation modes, with attention to basic concepts of two-dimensional separations: resolution, peak capacity, efficiency, orthogonality and selectivity. Particular attention is paid to the effects of sample structure on the retention and advantages of a multi-dimensional HPLC for separation of complex samples according to structural correlations. Optimization of 2D separation systems, including correct selection of columns, flow-rate, fraction volumes and mobile phase, is discussed. Benefits of simultaneous programmed elution in both dimensions of LCxLC comprehensive separations are shown.Experimental setup, modulation of the fraction collection and transfer from the first to the second dimension, compatibility of mobile phases in comprehensive LCxLC, 2D asymmetry and shifts in retention under changing second-dimension elution conditions, are addressed. Illustrative practical examples of comprehensive LCxLC separations are shown.
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43
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Vanhoutte DJ, Vivó-Truyols G, Schoenmakers PJ. Pareto-optimality study into the comparison of the separation potential of comprehensive two-dimensional liquid chromatography in the column and spatial modes. J Chromatogr A 2012; 1235:39-48. [DOI: 10.1016/j.chroma.2012.01.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 01/12/2012] [Accepted: 01/20/2012] [Indexed: 10/14/2022]
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44
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Groskreutz SR, Swenson MM, Secor LB, Stoll DR. Selective comprehensive multi-dimensional separation for resolution enhancement in high performance liquid chromatography. Part I: Principles and instrumentation. J Chromatogr A 2012; 1228:31-40. [DOI: 10.1016/j.chroma.2011.06.035] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 05/27/2011] [Accepted: 06/09/2011] [Indexed: 10/18/2022]
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45
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Estimation and optimization of the peak capacity of one-dimensional gradient high performance liquid chromatography using a long monolithic silica capillary column. J Chromatogr A 2012; 1228:283-91. [DOI: 10.1016/j.chroma.2011.12.088] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 12/09/2011] [Accepted: 12/27/2011] [Indexed: 11/17/2022]
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46
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Carr P, Davis J, Rutan S, Stoll D. Principles of Online Comprehensive Multidimensional Liquid Chromatography. ADVANCES IN CHROMATOGRAPHY 2012; 50:139-235. [DOI: 10.1201/b11636-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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47
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Filgueira MR, Huang Y, Witt K, Castells C, Carr PW. Improving peak capacity in fast online comprehensive two-dimensional liquid chromatography with post-first-dimension flow splitting. Anal Chem 2011; 83:9531-9. [PMID: 22017622 PMCID: PMC3237895 DOI: 10.1021/ac202317m] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The use of flow splitters between the two dimensions in online comprehensive two-dimensional (2D) liquid chromatography (LC × LC) has not received very much attention, in comparison with their use in 2D gas chromatography (GC × GC), where they are quite common. In principle, splitting the flow after the first dimension column and performing online LC × LC on this constant fraction of the first dimension effluent should allow the two dimensions to be optimized almost independently. When there is no flow splitting, any change in the first-dimension flow rate has an immediate impact on the second dimension. With a flow splitter, one could, for example, double the flow rate into the first dimension column and perform a 1:1 flow split without changing the sample loop size or the sampler's collection time. Of course, the sensitivity would be diminished, but this can be partially compensated through the use of a larger injection; this will likely only amount to a small price to pay for this increased resolving power and system flexibility. Among other benefits, we found a 2-fold increase in the corrected 2D peak capacity and the number of observed peaks for a 15-min analysis time, using a post-first-dimension flow splitter. At a fixed analysis time, this improvement results primarily from an increase in the gradient time, resulting from the reduced system re-equilibration time, and, to a smaller extent, it is due to the increased peak capacity achieved by full optimization of the first dimension.
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Affiliation(s)
- Marcelo R. Filgueira
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455, USA
- Univ Nacl La Plata, Div Quim Analit, Fac Ciencias Exactas, 47 y 115, La Plata RA-1900, Argentina
| | - Yuan Huang
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455, USA
| | - Klaus Witt
- Agilent Technologies Germany GmbH, Hewlett-Packard Str. 8, Waldbronn, BW 76337, Germany
| | - Cecilia Castells
- Univ Nacl La Plata, Div Quim Analit, Fac Ciencias Exactas, 47 y 115, La Plata RA-1900, Argentina
| | - Peter W. Carr
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455, USA
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48
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Nadeau JS, Wilson RB, Hoggard JC, Wright BW, Synovec RE. Study of the interdependency of the data sampling ratio with retention time alignment and principal component analysis for gas chromatography. J Chromatogr A 2011; 1218:9091-101. [DOI: 10.1016/j.chroma.2011.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 10/10/2011] [Accepted: 10/13/2011] [Indexed: 10/16/2022]
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49
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Davis JM, Rutan SC, Carr PW. Relationship between selectivity and average resolution in comprehensive two-dimensional separations with spectroscopic detection. J Chromatogr A 2011; 1218:5819-28. [DOI: 10.1016/j.chroma.2011.06.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 06/05/2011] [Accepted: 06/22/2011] [Indexed: 11/25/2022]
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50
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Huang Y, Gu H, Filgueira M, Carr PW. An experimental study of sampling time effects on the resolving power of on-line two-dimensional high performance liquid chromatography. J Chromatogr A 2011; 1218:2984-94. [PMID: 21489543 PMCID: PMC3132878 DOI: 10.1016/j.chroma.2011.03.032] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2010] [Revised: 02/21/2011] [Accepted: 03/16/2011] [Indexed: 12/12/2022]
Abstract
The experimental effects of sampling time on the resolving power of on-line LC×LC were investigated. The first dimension gradient time ((1)t(g)) and sampling time (t(s)) were systematically varied ((1)t(g)=5, 12, 24 and 49 min; t(s)=6, 12, 21 and 40s). The resolving power of on-line LC×LC was evaluated in terms of two metrics namely the numbers of observed peaks and the effective 2D peak capacities obtained in separations of extracts of maize seeds. The maximum effective peak capacity and number of observed peaks of LC×LC were achieved at sampling times between 12 and 21s, at all first dimension gradient times. In addition, both metrics showed that the "crossover" time at which fully optimized 1DLC and LC×LC have equal resolving power varied somewhat with sampling time but is only about 5 min for sampling times of 12 and 21s. The longest crossover time was obtained when the sampling time was 6s. Furthermore, increasing the first dimension gradient time gave large improvements in the resolving power of LC×LC relative to 1DLC. Finally, comparisons of the corrected and effective 2D peak capacities as well as the number of peaks observed showed that the impact of the coverage factor is quite significant.
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Affiliation(s)
- Yuan Huang
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455
| | - Haiwei Gu
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455
| | - Marcelo Filgueira
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455
- Univ Nacl La Plata, Div Quim Analit, Fac Ciencias Exactas, RA-1900 La Plata, Argentina
| | - Peter W. Carr
- Department of Chemistry, Smith and Kolthoff Halls, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455
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