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Miki T, Yamamoto S, Liu C, Torikai K, Kinoshita M, Matsumori N, Kawai T. Highly sensitive two-dimensional profiling of N-linked glycans by hydrophilic interaction liquid chromatography and dual stacking capillary gel electrophoresis. Anal Chim Acta 2024; 1320:342990. [PMID: 39142768 DOI: 10.1016/j.aca.2024.342990] [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: 03/06/2024] [Revised: 07/17/2024] [Accepted: 07/17/2024] [Indexed: 08/16/2024]
Abstract
BACKGROUND N-Glycosylation is one of the most important post-translational modifications in proteins. As the N-glycan profiles in biological samples are diverse and change according to the pathological condition, various profiling methods have been developed, such as liquid chromatography (LC), capillary electrophoresis (CE), and mass spectrometry. However, conventional analytical methods have limitations in sensitivity and/or resolution, hindering the discovery of minor but specific N-glycans that are important both in the basic glycobiology research and in the medical application as biomarkers. Therefore, a highly sensitive and high-resolution N-glycan profiling method is required. RESULTS In this study, we developed a novel two-dimensional (2D) separation system, which couples hydrophilic interaction liquid chromatography (HILIC) with capillary gel electrophoresis (CGE) via large-volume dual preconcentration by isotachophoresis and stacking (LDIS). Owing to the efficient preconcentration efficiency of LDIS, limit of detection reached 12 pM (60 amol, S/N = 3) with good calibration curve linearity (R2 > 0.999) in the 2D analysis of maltoheptaose. Finally, 2D profiling of N-glycans obtained from standard glycoproteins and cell lysates were demonstrated. High-resolution 2D profiles were successfully obtained by data alignment using triple internal standards. N-glycans were well distributed on the HILIC/CGE 2D plane based on the glycan size, number of sialic acids, linkage type, and so on. As a result, specific minor glycans were successfully identified in HepG2 and HeLa cell lysates. SIGNIFICANCE AND NOVELTY In conclusion, the HILIC/CGE 2D analysis method showed sufficient sensitivity and resolution for identifying minor but specific N-glycans from complicated cellular samples, indicating the potential as a next-generation N-glycomics tool. Our novel approach for coupling LC and CE can also dramatically improve the sensitivity in other separation modes, which can be a new standard of 2D bioanalysis applicable not only to glycans, but also to other diverse biomolecules such as metabolites, proteins, and nucleic acids.
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Affiliation(s)
- Takaya Miki
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Sachio Yamamoto
- Faculty of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka, 577-8502, Japan
| | - Chenchen Liu
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kohei Torikai
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan; Faculty of Chemistry, National University of Uzbekistan named after Mirzo Ulugbek, 4 University Str., Tashkent, 100174, Uzbekistan
| | - Mitsuhiro Kinoshita
- Faculty of Pharmaceutical Sciences, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka, 577-8502, Japan
| | - Nobuaki Matsumori
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Takayuki Kawai
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan; RIKEN Center for Biosystems Dynamics Research, 6-2-4 Furuedai, Suita, Osaka, 565-0874, Japan.
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Vallamkonda B, Sethi S, Satti P, Das DK, Yadav S, Vashistha VK. Enantiomeric Analysis of Chiral Drugs Using Mass Spectrometric Methods: A Comprehensive Review. Chirality 2024; 36:e23705. [PMID: 39105272 DOI: 10.1002/chir.23705] [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: 06/01/2024] [Revised: 07/03/2024] [Accepted: 07/09/2024] [Indexed: 08/07/2024]
Abstract
Chirality plays a crucial role in the drug development process, influencing fundamental chemical and biochemical processes and significantly affecting our daily lives. This review provides a comprehensive examination of mass spectrometric (MS) methods for the enantiomeric analysis of chiral drugs. It thoroughly investigates MS-hyphenated techniques, emphasizing their critical role in achieving enantioselective analysis. Furthermore, it delves into the intricate chiral recognition mechanisms inherent in MS, elucidating the fundamental principles that govern successful chiral separations. By critically assessing the obstacles and potential benefits associated with each MS-based method, this review offers valuable insights for researchers navigating the complexities of chiral analysis. Both qualitative and quantitative approaches are explored, presenting a comparative analysis of their strengths and limitations. This review is aimed at significantly enhancing the understanding of chiral MS methods, serving as a crucial resource for researchers and practitioners engaged in enantioselective studies.
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Affiliation(s)
- Bhaskar Vallamkonda
- Department of Pharmaceutical Science, VIGNAN'S Foundation for Science, Technology & Research, Guntur, Andhra Pradesh, India
| | - Sonika Sethi
- Department of Chemistry, GD Goenka University, Gurugram, Haryana, India
| | - PhanikumarReddy Satti
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India
| | | | - Suman Yadav
- Department of Chemistry, Swami Shraddhanand College, University of Delhi, Delhi, India
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Lin Z, Wang Q, Zhou Y, Shackman JG. Trapping mode two-dimensional liquid chromatography for quantitative low-level impurity enrichment in pharmaceutical development. J Chromatogr A 2023; 1700:464043. [PMID: 37172541 DOI: 10.1016/j.chroma.2023.464043] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/20/2023] [Accepted: 05/02/2023] [Indexed: 05/15/2023]
Abstract
Trapping mode two-dimensional liquid chromatography (2D-LC) has recently found applications in pharmaceutical analysis to clean, refocus, and enrich analytes. Given its enrichment capability, 2D-LC with multiple trappings is appealing for low-level impurity monitoring that cannot be solved by single dimensional LC (1D-LC) or unenriched 2D-LC analysis. However, the quantitative features of multi-trapping 2D-LC remain largely unknown at impurity levels from parts-per-million (ppm) to 0.15% (w/w). We present a simple heart-cutting trapping mode 2D-LC workflow using only common components and software found in typical off-the-shelf 1D-LC instruments. This robust, turn-key system's quantitative capabilities were evaluated using a variety of standard markers, demonstrating linear enrichment for up to 20 trapping cycles and achieving a recovery of over 97.0%. Next, the trapping system was applied to several real-world low-level impurity pharmaceutical case studies including (1) the identification of two unknown impurities at sub-ppm levels resulting in material discoloration, (2) the discovery of a new impurity at 0.05% (w/w) co-eluted with a known impurity, making the undesired summation above the target specification, and (3) the quantification of a potential mutagenic impurity at 10-ppm level in a poorly soluble substrate. The recovery in all studies was better than 97.0% with RSD lower than 3.0%, demonstrating accuracy and precision of the 2D-LC trapping workflow. As no specialized equipment or software is required, we envision that the system could be used to develop low-impurity monitoring methods suitable for validation and potential execution in quality-control laboratories.
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Affiliation(s)
- Ziqing Lin
- Bristol Myers Squibb Company, Chemical Process Development, One Squibb Drive, New Brunswick, NJ 08903, USA.
| | - Qinggang Wang
- Bristol Myers Squibb Company, Chemical Process Development, One Squibb Drive, New Brunswick, NJ 08903, USA
| | - Yiyang Zhou
- Bristol Myers Squibb Company, Chemical Process Development, One Squibb Drive, New Brunswick, NJ 08903, USA
| | - Jonathan G Shackman
- Bristol Myers Squibb Company, Chemical Process Development, One Squibb Drive, New Brunswick, NJ 08903, USA
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4
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A multidimensional chromatography/high-resolution mass spectrometry approach for the in-depth metabolites characterization of two Astragalus species. J Chromatogr A 2023; 1688:463718. [PMID: 36565652 DOI: 10.1016/j.chroma.2022.463718] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 12/02/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
To address the chemical complexity is indispensable in a number of research fields. Herb metabolome is typically composed by more than one class of structure analogs produced via different biosynthetic pathways. Multidimensional chromatography (MDC), due to the greatly enhanced separation space, offers the potential solution to comprehensive characterization of herbal metabolites. Here, we presented a strategy, by integrating MDC and quadrupole time-of-flight mass spectrometry (QTOF-MS), to accomplish the in-depth herbal metabolites characterization. Using the metabolome of two Astragalus species (A. membranaceus var. mongholicus,AMM; A. membranaceus, AM) as the case, an off-line three-dimensional liquid chromatography (3D-LC) system was established: hydrophilic interaction chromatography using an XAmide column as the first dimension (1D) for fractionating the total extract, on-line reversed-phase × reversed-phase liquid chromatography separately configuring a CSH Fluoro-Phenyl column and a Cosmocore C18 column as the second dimension (2D) and the third dimension (3D) of chromatography to enable the explicit separation of three well fractionated samples. Moreover, the negative-mode collision-induced dissociation by QTOF-MS under the optimized condition could provide diversified fragments that were useful for the structural elucidation of AMM and AM. An in-house library (composed by 247 known compounds) and comparison with 43 reference standards were utilized to assist more reliable characterization. We could characterize 513 compounds from two Astragalus species (344 from AMM and 323 from AM), including 236 flavonoids, 150 triterpenoids, 18 organic acids, and 109 others. Conclusively, the established MDC approach gained excellent performance favoring the analogs-oriented in-depth characterization of herbal metabolites, but received uncompromising analytical efficiency.
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Tang S, Venkatramani CJ. Resolving Solvent Incompatibility in Two-Dimensional Liquid Chromatography with In-Line Mixing Modulation. Anal Chem 2022; 94:16142-16150. [DOI: 10.1021/acs.analchem.2c03572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shijia Tang
- Small Molecule Analytical Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
| | - Cadapakam J. Venkatramani
- Small Molecule Analytical Chemistry, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
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Roskam G, van de Velde B, Gargano A, Kohler I. Supercritical Fluid Chromatography for Chiral Analysis, Part 2: Applications. LCGC EUROPE 2022. [DOI: 10.56530/lcgc.eu.fn8374q5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the second part of this review article, the recent progress in supercritical fluid chromatography (SFC) for enantiomeric separations is evaluated. With the substantial developments carried out over the past years in instrumentation, columns, and detector hyphenation, the interest in chiral SFC has been steadily growing in various fields. In combination with novel developments in chiral stationary phase chemistries, the enantioselective analysis range has been significantly extended. Several applications reported on the enantioselective separation of drugs and pharmaceutical compounds using chiral SFC are discussed, including pharmaceutical applications, clinical research, forensic toxicology, and environmental sciences.
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Effect of the injection of water-containing diluents on band broadening in analytical supercritical fluid chromatography. J Chromatogr A 2022; 1673:463056. [DOI: 10.1016/j.chroma.2022.463056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/24/2022] [Accepted: 04/11/2022] [Indexed: 11/17/2022]
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Ferguson P, Hicks M. The state-of-the-art and future perspectives for SFC. SEP SCI TECHNOL 2022. [DOI: 10.1016/b978-0-323-88487-7.00013-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Chen L, Dean B, Liang X. A technical overview of supercritical fluid chromatography-mass spectrometry (SFC-MS) and its recent applications in pharmaceutical research and development. DRUG DISCOVERY TODAY. TECHNOLOGIES 2021; 40:69-75. [PMID: 34916026 DOI: 10.1016/j.ddtec.2021.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 09/28/2021] [Accepted: 10/05/2021] [Indexed: 06/14/2023]
Abstract
In this paper, we review the growing development and applications of supercritical fluid chromatography-mass spectrometry (SFC-MS) for the analysis of small molecular analytes and biomarkers in drug discovery. As an alternative chromatographic technique, SFC instrumentation and methodology have dramatically advanced over the last decade. Mass spectrometry (MS) provides the powerful detection capability as it couples with SFC. A growing number of SFC-MS/MS applications were reported over the last decade and the application areas of SFC-MS/MS is rapidly expanding. The first part of this review is devoted to the different aspects of SFC-MS development and recent technological advancements. In the second part of this review, we highlight the recent application areas in pharmaceutical research and development.
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Affiliation(s)
- Liuxi Chen
- Drug Metabolism & Pharmacokinetics, 1 DNA way, Genentech Inc., South San Francisco, CA, USA.
| | - Brian Dean
- Drug Metabolism & Pharmacokinetics, 1 DNA way, Genentech Inc., South San Francisco, CA, USA
| | - Xiaorong Liang
- Drug Metabolism & Pharmacokinetics, 1 DNA way, Genentech Inc., South San Francisco, CA, USA
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10
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Burlet-Parendel M, Faure K. Opportunities and challenges of liquid chromatography coupled to supercritical fluid chromatography. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116422] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Yamamoto K, Machida K, Kotani A, Hakamata H. Emerging Separation Techniques in Supercritical Fluid Chromatography. Chem Pharm Bull (Tokyo) 2021; 69:970-975. [PMID: 34602578 DOI: 10.1248/cpb.c21-00306] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Supercritical fluid chromatography (SFC) has unique separative characteristics distinguished from those of HPLC and gas chromatography. At present, SFC is widely used and there are many applications in various biological, medical, and pharmaceutical fields. In this review, we focus on recently developed novel techniques related to SFC separation including: new column stationary phases, microfluidics, two-dimensional separation, and gas-liquid separation. In addition, we discuss the application of SFC using a water-containing modifier to biological molecules such as amino acids, peptides, and small proteins that had been challenging analytes.
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Affiliation(s)
- Kazuhiro Yamamoto
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Koichi Machida
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Akira Kotani
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Hideki Hakamata
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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12
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13
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Chiral chromatography method screening strategies: Past, present and future. J Chromatogr A 2021; 1638:461878. [PMID: 33477025 DOI: 10.1016/j.chroma.2021.461878] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/31/2020] [Accepted: 01/02/2021] [Indexed: 11/23/2022]
Abstract
Method screening is an integral part of chromatographic method development for the separation of racemates. Due to the highly complex retention mechanism of a chiral stationary-phase, it is often difficult, if not impossible, to device predefined method-development steps that can be successfully applied to a wide group of molecules. The standard approach is to evaluate or screen a series of stationary and mobile-phase combinations to increase the chances of detecting a suitable separation condition. Such a process is often the rate-limiting step for high-throughput analyses and purification workflows. To address the problem, several solutions and strategies have been proposed over the years for reduction of net method-screening time. Some of the strategies have been adopted in practice while others remained confined in the literature. The main objective of this review is to revisit, critically discuss and compile the solutions published over the last two decades. We expect that making the diverse set of solutions available in a single document will help assessing the adequacy of existing screening protocols in laboratories conducting chiral separation.
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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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Groeneveld G, Pirok BWJ, Schoenmakers PJ. Perspectives on the future of multi-dimensional platforms. Faraday Discuss 2020; 218:72-100. [PMID: 31140485 DOI: 10.1039/c8fd00233a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two-dimensional liquid chromatography (2D-LC) formats have emerged to help address separation problems that are too complex for conventional one-dimensional LC. There are a number of obstacles to the proliferation of 2D-LC that are gradually being removed. Reliable commercial instrumentation has become available and data analysis software is being improved. Detector-sensitivity and phase-system compatibility issues can largely be solved by using active-modulation strategies. The remaining challenge, developing good and fast 2D-LC methods within a reasonable time, may be solved with smart algorithms. The technology platform that has been developed for 2D-LC also creates a number of other possibilities. Between the two separation stages, all kinds of physical (e.g. dissolution) or chemical (e.g. enzymatic or light-induced degradation) processes can be made to take place, allowing a wide variety of experiments to be performed within a single, efficient and automated analysis. All these developments are discussed in this paper and a number of critical issues are identified. A practical example, the characterization of polysorbates by high-resolution comprehensive two-dimensional liquid chromatography in combination with high-resolution mass spectrometry, is described as a culmination of recent developments in 2D-LC and as an illustration of the current state of the art.
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Affiliation(s)
- Gino Groeneveld
- University of Amsterdam, van 't Hoff Institute for Molecular Sciences, Analytical-Chemistry Group, Science Park 904, 1098 XH Amsterdam, The Netherlands.
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Pirok BWJ, Stoll DR, Schoenmakers PJ. Recent Developments in Two-Dimensional Liquid Chromatography: Fundamental Improvements for Practical Applications. Anal Chem 2019; 91:240-263. [PMID: 30380827 PMCID: PMC6322149 DOI: 10.1021/acs.analchem.8b04841] [Citation(s) in RCA: 202] [Impact Index Per Article: 40.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Bob W. J. Pirok
- University
of Amsterdam, van ’t Hoff
Institute for Molecular Sciences, Analytical-Chemistry Group, Science Park 904, 1098 XH Amsterdam, The Netherlands
- TI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Dwight R. Stoll
- Department
of Chemistry, Gustavus Adolphus College, Saint Peter, Minnesota 56082, United States
| | - Peter J. Schoenmakers
- University
of Amsterdam, van ’t Hoff
Institute for Molecular Sciences, Analytical-Chemistry Group, Science Park 904, 1098 XH Amsterdam, The Netherlands
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Harps LC, Joseph JF, Parr MK. SFC for chiral separations in bioanalysis. J Pharm Biomed Anal 2019; 162:47-59. [DOI: 10.1016/j.jpba.2018.08.061] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/28/2018] [Accepted: 08/30/2018] [Indexed: 01/31/2023]
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High-Speed, High-Efficiency Achiral SFC on a 3 × 20-mm Column Packed with 1.8-µm Particles Facilitated by a Low-Dispersion Chromatograph. Chromatographia 2018. [DOI: 10.1007/s10337-018-3655-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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D’Atri V, Fekete S, Clarke A, Veuthey JL, Guillarme D. Recent Advances in Chromatography for Pharmaceutical Analysis. Anal Chem 2018; 91:210-239. [DOI: 10.1021/acs.analchem.8b05026] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Valentina D’Atri
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CMU-Rue Michel Servet 1, 1211 Geneva 4, Switzerland
| | - Szabolcs Fekete
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CMU-Rue Michel Servet 1, 1211 Geneva 4, Switzerland
| | - Adrian Clarke
- Novartis Pharma AG, Technical Research and Development, Chemical and Analytical Development (CHAD), Basel, CH4056, Switzerland
| | - Jean-Luc Veuthey
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CMU-Rue Michel Servet 1, 1211 Geneva 4, Switzerland
| | - Davy Guillarme
- School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, CMU-Rue Michel Servet 1, 1211 Geneva 4, Switzerland
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Recent Achievements and Future Challenges in Supercritical Fluid Chromatography for the Enantioselective Separation of Chiral Pharmaceuticals. Chromatographia 2018. [DOI: 10.1007/s10337-018-3606-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Current trends in supercritical fluid chromatography. Anal Bioanal Chem 2018; 410:6441-6457. [DOI: 10.1007/s00216-018-1267-4] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 06/18/2018] [Accepted: 07/12/2018] [Indexed: 12/16/2022]
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