1
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Li P, Wu DR, Yip SH, Sun D, Pawluczyk J, Smith A, Kempson J, Mathur A. Large-scale purification of a deprotected macrocyclic peptide by supercritical fluid chromatography (SFC) integrated with liquid chromatography in discovery chemistry. J Chromatogr A 2024; 1730:465112. [PMID: 38972253 DOI: 10.1016/j.chroma.2024.465112] [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: 04/01/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/09/2024]
Abstract
A macrocyclic peptide A was successfully purified in large quantities (∼30 g) in >95 % purity by an integrated two-step orthogonal purification process combining supercritical fluid chromatography (SFC) with medium-pressure reverse-phase liquid chromatography (MP-RPLC). MP-RPLC was used to fractionate the crude peptide A, remove unwanted trifluoroacetic acid (TFA) originating from the peptide A cleavage off the resin, and convert the peptide A into ammonium acetate salt form, prior to the final purification by SFC. A co-solvent of methanol/acetonitrile containing ammonium acetate and water in CO2 was developed on a Waters BEH 2-Ethylpyridine column. The developed SFC method was readily scaled up onto a 5 cm diameter column to process multi-gram quantities of the MP-RPLC fraction to reach > 95 % purity with a throughput/productivity of 0.96 g/h. The incorporation of SFC with MP-RPLC has been demonstrated to have a broader application in other large-scale polypeptide purifications.
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Affiliation(s)
- Peng Li
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Dauh-Rurng Wu
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Shiuhang Henry Yip
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA.
| | - Dawn Sun
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Joseph Pawluczyk
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Aaron Smith
- Spectrix, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - James Kempson
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
| | - Arvind Mathur
- Department of Discovery Synthesis, Research and Development, Bristol-Myers Squibb, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, USA
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2
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Yue L, Miller L, Reilly J. Analytical and preparative chiral supercritical fluid chromatography resolutions using crown ether-derived column. Chirality 2024; 36:e23621. [PMID: 37737018 DOI: 10.1002/chir.23621] [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: 08/06/2023] [Revised: 09/04/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023]
Abstract
In this study, crown ether-derived column Crownpak® CR-I (+) was evaluated under SFC conditions using 12 primary amines, and the chromatographic results were compared against eight immobilized polysaccharide-based columns. Crownpak® CR-I (+) achieved a significantly higher success rate. It was found that the addition of 5% water to the modifier dramatically improved the peak shape for chiral separation of primary amines on Crownpak® CR-I (+). The first reported preparative SFC separations on Crownpak® CR-I (+) are shown, offering a new approach for the preparative resolution of primary amines. The case studies demonstrate that Crownpak® CR-I (+) is a very useful column in the chiral separation of challenging compounds that contain a primary amine group in the pharmaceutical industry.
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Affiliation(s)
- Lei Yue
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts, USA
| | | | - John Reilly
- Novartis Institutes for BioMedical Research, Basel, Switzerland
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3
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Kaya C, Birgül K, Bülbül B. Fundamentals of chirality, resolution, and enantiopure molecule synthesis methods. Chirality 2023; 35:4-28. [PMID: 36366874 DOI: 10.1002/chir.23512] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/23/2022] [Accepted: 10/11/2022] [Indexed: 11/13/2022]
Abstract
The chirality of molecules is a concept that explains the interactions in nature. We may observe the same formula but different organizations revolving around the chiral center. Since Pasteur's meticulous observation of sodium ammonium tartrate crystals' structure, scientists have discovered many features of chiral molecules. The number of newly approved single enantiomeric drugs increases every year and takes place in the market. Thus, separation or resolution methods of racemic mixtures are of continued importance in the efficacy of drugs, installation of affordable production processes, and convenient synthetic chemistry practice. This article presents the asymmetric synthesis approaches and the classification of direct resolution methods of chiral molecules.
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Affiliation(s)
- Cem Kaya
- Department of Pharmacy, Haydarpasa Numune Training and Research Hospital, İstanbul, Turkey.,Department of Pharmaceutical Chemistry, School of Pharmacy, Altınbaş University, İstanbul, Turkey
| | - Kaan Birgül
- Department of Pharmaceutical Chemistry, School of Pharmacy, Bahçeşehir University, İstanbul, Turkey
| | - Bahadır Bülbül
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Düzce University, Düzce, Turkey
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4
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Peluso P, Chankvetadze B. Recognition in the Domain of Molecular Chirality: From Noncovalent Interactions to Separation of Enantiomers. Chem Rev 2022; 122:13235-13400. [PMID: 35917234 DOI: 10.1021/acs.chemrev.1c00846] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
It is not a coincidence that both chirality and noncovalent interactions are ubiquitous in nature and synthetic molecular systems. Noncovalent interactivity between chiral molecules underlies enantioselective recognition as a fundamental phenomenon regulating life and human activities. Thus, noncovalent interactions represent the narrative thread of a fascinating story which goes across several disciplines of medical, chemical, physical, biological, and other natural sciences. This review has been conceived with the awareness that a modern attitude toward molecular chirality and its consequences needs to be founded on multidisciplinary approaches to disclose the molecular basis of essential enantioselective phenomena in the domain of chemical, physical, and life sciences. With the primary aim of discussing this topic in an integrated way, a comprehensive pool of rational and systematic multidisciplinary information is provided, which concerns the fundamentals of chirality, a description of noncovalent interactions, and their implications in enantioselective processes occurring in different contexts. A specific focus is devoted to enantioselection in chromatography and electromigration techniques because of their unique feature as "multistep" processes. A second motivation for writing this review is to make a clear statement about the state of the art, the tools we have at our disposal, and what is still missing to fully understand the mechanisms underlying enantioselective recognition.
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Affiliation(s)
- Paola Peluso
- Istituto di Chimica Biomolecolare ICB, CNR, Sede secondaria di Sassari, Traversa La Crucca 3, Regione Baldinca, Li Punti, I-07100 Sassari, Italy
| | - Bezhan Chankvetadze
- Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences, Tbilisi State University, Chavchavadze Avenue 3, 0179 Tbilisi, Georgia
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5
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Roy D, Tarafder A, Miller L. Additives in chiral packed column super/subcritical fluid chromatography: A little goes a long way. J Chromatogr A 2022; 1676:463216. [DOI: 10.1016/j.chroma.2022.463216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 06/08/2022] [Accepted: 06/10/2022] [Indexed: 10/18/2022]
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6
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Chiral secondary amino acids, their importance, and methods of analysis. Amino Acids 2022; 54:687-719. [PMID: 35192062 DOI: 10.1007/s00726-022-03136-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 02/04/2022] [Indexed: 11/01/2022]
Abstract
Naturally occurring secondary amino acids, with proline as the main representative, contain an alpha-imino group in a cycle that is typically four-, five-, and six-membered. The unique ring structure exhibits exceptional properties-conformational rigidity, chemical stability, and specific roles in protein structure and folding. Many proline analogues have been used as valuable compounds for the study of metabolism of both prokaryotic and eukaryotic cells and for the synthesis of compounds with desired biological, pharmaceutical, or industrial properties. The D-forms of secondary amino acids play different roles in living organisms than the L-forms. They have different metabolic pathways, biological, physiological, and pharmacological effects, they can be indicators of changes and also serve as biomarkers of diseases. In the scientific literature, the number of articles examining D-amino acids in biological samples is increasing. The review summarises information on the occurrence and importance of D- and L-secondary amino acids-azetidic acid, proline, hydroxyprolines, pipecolic, nipecotic, hydroxypipecolic acids and related peptides containing these D-AAs, as well as the main analytical methods (mostly chromatographic) used for their enantiomeric determination in different matrices (biological samples, plants, food, water, and soil).
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7
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Qiu X, Liu Y, Zhao T, Zuo L, Ma X, Shan G. Separation of chiral and achiral impurities in paroxetine hydrochloride in a single run using supercritical fluid chromatography with a polysaccharide stationary phase. J Pharm Biomed Anal 2022; 208:114458. [PMID: 34768158 DOI: 10.1016/j.jpba.2021.114458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/29/2021] [Accepted: 10/30/2021] [Indexed: 11/18/2022]
Abstract
Separating paroxetine hydrochloride and its impurities using conventional reversed-phase liquid chromatography (RPLC) is challenging due to their highly similar structures. In the present study, a rapid, simple, sensitive and environmentally friendly method was developed for the determination of chiral and achiral impurities in raw materials of paroxetine hydrochloride using chiral supercritical fluid chromatography (SFC). The impacts of chiral stationary phases (CSPs), mobile phases, column temperature and back pressure on the retention and separation of analytes were comprehensively evaluated. After method optimization, a satisfying result was obtained on a cellulose tris-(3-chloro-4-methylphenylcarbamate) stationary phase in 4.0 min using 70% CO2 and 20 mM ammonium acetate in 30% methanol as the mobile phase. Molecular docking was further performed to understand the interactions between the analytes and CSP. The results suggested that hydrogen bonding and π-π interactions were the dominant interactions. The affinity given by the software was in good agreement with the elution order and free energy (△G) values obtained from van't Hoff equations. The results of molecular docking also provide insights into the different retentions of N-methylparoxetine at different temperatures. The results of method validation revealed that the method was sensitive with a limit of detection of approximately 0.05 μg·mL-1 (corresponding to approximately 0.005% paroxetine hydrochloride in the sample solution). The relative standard deviations (RSDs) of precision and intra-assay precision were all less than 2.0%, and the recoveries of the method were 93.8~105.3% with RSDs less than 3.0%. The chiral and achiral RPLC methods included in the Chinese pharmacopoeia and the SFC method proposed in this study were simultaneously used to determine the impurity content in the raw materials of paroxetine hydrochloride. The results showed that impurities that cannot be detected by the reference method can be accurately quantified using the SFC method. In addition, the SFC method has advantages in terms of throughput, analysis cost and simplicity. This study can provide a reference for further research of impurities in paroxetine hydrochloride and promote the application of chiral SFC in the rapid separation of structurally similar compounds.
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Affiliation(s)
- Xiaodan Qiu
- Institute of Medicinal Biotechnology, Peking Union Medical College & Chinese Academy of Medical Sciences, No.1, Tian Tan Xi Li, 100050 Beijing, PR China
| | - Yitong Liu
- Institute of Medicinal Biotechnology, Peking Union Medical College & Chinese Academy of Medical Sciences, No.1, Tian Tan Xi Li, 100050 Beijing, PR China
| | - Ting Zhao
- Institute of Medicinal Biotechnology, Peking Union Medical College & Chinese Academy of Medical Sciences, No.1, Tian Tan Xi Li, 100050 Beijing, PR China
| | - Limin Zuo
- Institute of Medicinal Biotechnology, Peking Union Medical College & Chinese Academy of Medical Sciences, No.1, Tian Tan Xi Li, 100050 Beijing, PR China
| | - Xun Ma
- China National Institutes for Food and Drug Control, No. 2, Tian Tan Xi Li, 100050 Beijing, PR China.
| | - Guangzhi Shan
- Institute of Medicinal Biotechnology, Peking Union Medical College & Chinese Academy of Medical Sciences, No.1, Tian Tan Xi Li, 100050 Beijing, PR China.
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Yue ZX, Gu YX, Yan TC, Li MH, Zheng H, Cao J. Ion pair-based mobile phase additives to improve the separation of alkaloids in supercritical fluid chromatography. J Pharm Biomed Anal 2022; 208:114467. [PMID: 34775191 DOI: 10.1016/j.jpba.2021.114467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/07/2021] [Accepted: 11/02/2021] [Indexed: 01/05/2023]
Abstract
In this study, a supercritical fluid chromatography (SFC) method based on ion pair reagents was used to separate alkaloids. The chromatographic parameters, including the stationary phase, additive type, additive concentration, outlet pressure, temperature and flow rate, were optimized. Baseline separation was completed in 20 min on an Agilent Pursuit 5 PFP column (4.6 × 150 mm) using carbon dioxide as the mobile phase and 7.5 mM sodium 1-pentanesulfonate as an additive with gradient elution at 140 bar, 60 °C, and a flow rate of 1.5 mL/min. The retention rate and resolution of the analytes were satisfactory. The limits of detection were 27.04-298.03 ng/mL, and the limits of quantification were 90.15-993.42 ng/mL. The recoveries of low and high concentrations were 77.46-111.86% and 83.84-111.00%, respectively. This ion pair additive greatly improved the separation efficiency of alkaloids. Consequently, this SFC method was successfully applied to the separation of alkaloids from Rhizoma corydalis.
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Affiliation(s)
- Zi-Xuan Yue
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Yu-Xin Gu
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Tian-Ci Yan
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Min-Hui Li
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China
| | - Hui Zheng
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, PR China.
| | - Jun Cao
- College of Pharmacy, Hangzhou Normal University, Hangzhou 311121, PR China; College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, PR China.
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9
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West C, Lesellier E. Selection of SFC stationary and mobile phases. SEP SCI TECHNOL 2022. [DOI: 10.1016/b978-0-323-88487-7.00008-5] [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: 12/04/2022]
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10
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Beres M. Expanding the boundaries of SFC: Analysis of biomolecules. SEP SCI TECHNOL 2022. [DOI: 10.1016/b978-0-323-88487-7.00011-5] [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: 12/05/2022]
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11
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Ali I, Raja R, Alam SD, Shirsath V, K. Jain A, Locatelli M, David V. A comparison of chiral separations by supercritical fluid chromatography and high-performance liquid chromatography. J LIQ CHROMATOGR R T 2021. [DOI: 10.1080/10826076.2021.1979037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Imran Ali
- Department of Chemistry, Jamia Millia Islamia, New Delhi, India
| | - Rupak Raja
- Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, India
- Jubilant Biosys Limited, Noida, India
| | | | | | - Arvind K. Jain
- Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, India
| | - Marcello Locatelli
- Department of Pharmacy, Analytical and Bioanalytical Chemistry, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Victor David
- Department of Analytical Chemistry, University of Bucharest, Romania
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12
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Yang Y, Wang Y, Bao Z, Yang Q, Zhang Z, Ren Q. Progress in the Enantioseparation of β-Blockers by Chromatographic Methods. Molecules 2021; 26:molecules26020468. [PMID: 33477385 PMCID: PMC7830546 DOI: 10.3390/molecules26020468] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 12/31/2022] Open
Abstract
β-adrenergic antagonists (β-blockers) with at least one chiral center are an exceedingly important class of drugs used mostly to treat cardiovascular diseases. At least 70 β-blockers have been investigated in history. However, only a few β-blockers, e.g., timolol, are clinically marketed as an optically pure enantiomer. Therefore, the separation of racemates of β-blockers is essential both in the laboratory and industry. Many approaches have been explored to obtain the single enantiomeric β-blocker, including high performance liquid chromatography, supercritical fluid chromatography and simulated moving bed chromatography. In this article, a review is presented on different chromatographic methods applied for the enantioseparation of β-blockers, covering high performance liquid chromatography (HPLC), supercritical fluid chromatography (SFC) and simulated moving bed chromatography (SMB).
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Affiliation(s)
- Yiwen Yang
- Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (Y.W.); (Z.B.); (Q.Y.); (Z.Z.); (Q.R.)
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
- Correspondence:
| | - Yehui Wang
- Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (Y.W.); (Z.B.); (Q.Y.); (Z.Z.); (Q.R.)
| | - Zongbi Bao
- Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (Y.W.); (Z.B.); (Q.Y.); (Z.Z.); (Q.R.)
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Qiwei Yang
- Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (Y.W.); (Z.B.); (Q.Y.); (Z.Z.); (Q.R.)
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Zhiguo Zhang
- Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (Y.W.); (Z.B.); (Q.Y.); (Z.Z.); (Q.R.)
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Qilong Ren
- Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; (Y.W.); (Z.B.); (Q.Y.); (Z.Z.); (Q.R.)
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
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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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Jin Y, Pan Y, Jin B, Jin D, Zhang C. (S)-1-(5-(4-Methylpiperazin-1-yl)-2,4-dinitrophenyl)pyrrolidine-2-carboxylic acid as a derivatization reagent for ultrasensitive detection of amine enantiomers by HPLC-MS/MS and its application to the chiral metabolite analysis of (R)-1-aminoindan in saliva. J Pharm Biomed Anal 2020; 194:113815. [PMID: 33328145 DOI: 10.1016/j.jpba.2020.113815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/27/2020] [Accepted: 11/29/2020] [Indexed: 01/08/2023]
Abstract
(S)-1-(5-(4-Methylpiperazin-1-yl)-2,4-dinitrophenyl)pyrrolidine-2-carboxylic acid (Pro-PPZ) was employed as a chiral derivatization reagent (CDR) for the efficient enantioseparation and ultrasensitive mass spectrometric detection of chiral amines. Pro-PPZ was prepared from the one-step reaction of 1-(5-fluoro-2,4-dinitrophenyl)-4-methylpiperazine (PPZ) and l-proline. Two amines and two amino acid methyl esters were selected as model chiral amines, which were easily labeled with Pro-PPZ under mild reaction conditions (35 °C for 10 min) generating Pro-PPZ-amine derivatives. The resulting diastereomers were completely separated by reversed-phase liquid chromatography (RP-LC) using an ODS column (Rs = 3.4-17.0 for amines). Ultrasensitive detection limits on femtomolar level were obtained for the tested amines using multiple reaction monitoring (MRM) chromatograms at a single monitoring ion, m/z 289 (0.1-5.0 fmol for amines). The practical metabolite analysis of (R)-1-aminoindan (R-AI) in saliva samples was performed by LC-MS/MS using the Pro-PPZ derivatization method. The method was validated in terms of precision, accuracy, and linearity. Using this method, R-AI concentrations in saliva were determined after a single oral administration of the drug rasagiline to healthy male and female subjects, but no (S)-1-aminoindan (S-AI) was detected, which suggesting that R-AI was not converted into S-enantiomer in the metabolic process. R-AI concentrations in four healthy volunteers ranged from 32.85 nM to 49.45 nM, with an average value of 43.76 nM. To date, there is no LC-MS (or MS/MS) method reported for the enantioselective determination of R-AI in human saliva samples.
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Affiliation(s)
- Youxi Jin
- Department of Chemistry, Yanbian University, Yanji, 133002, China
| | - Yu Pan
- Research Institute of Jilin Petrochemical Company, Petro China, Jilin, 132021, China
| | - Biao Jin
- Instrumental Analysis Center, Yanbian University, Yanji, 133002, China
| | - Dongri Jin
- Department of Chemistry, Yanbian University, Yanji, 133002, China.
| | - Chunbo Zhang
- Department of Chemistry, Yanbian University, Yanji, 133002, China.
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15
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Molineau J, Hideux M, West C. Chromatographic analysis of biomolecules with pressurized carbon dioxide mobile phases - A review. J Pharm Biomed Anal 2020; 193:113736. [PMID: 33176241 DOI: 10.1016/j.jpba.2020.113736] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/24/2020] [Accepted: 10/24/2020] [Indexed: 12/14/2022]
Abstract
Biomolecules like proteins, peptides and nucleic acids widely emerge in pharmaceutical applications, either as synthetic active pharmaceutical ingredients, or from natural products as in traditional Chinese medicine. Liquid-phase chromatographic methods (LC) are widely employed for the analysis and/or purification of such molecules. On another hand, to answer the ever-increasing requests from scientists involved in biomolecules projects, other chromatographic methods emerge as useful complements to LC. In particular, there is a growing interest for chromatography with a mobile phase comprising pressurized carbon dioxide, which can be named either (i) supercritical (or subcritical) fluid chromatography (SFC) when CO2 is the major constituent of the mobile phase, or (ii) enhanced fluidity liquid chromatography (EFLC) when hydro-organic or purely organic solvents are the major constituents of the mobile phase. Despite the low polarity of CO2, supposedly inadequate to solubilize such biomolecules, SFC and EFLC were both employed in many occasions for this purpose. This paper specifically reviews the literature related to the SFC/EFLC analysis of free amino acids, peptides, proteins, nucleobases, nucleosides and nucleotides. The analytical conditions employed for specific molecular families are presented, with a focus on the nature of the stationary phase and the mobile phase composition. We also discuss the potential benefits of combining SFC/EFLC to LC in a single gradient elution, a method sometimes designated as unified chromatography (UC). Finally, detection issues are presented, and more particularly hyphenation to mass spectrometry.
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Affiliation(s)
- Jérémy Molineau
- University of Orleans, ICOA, CNRS UMR 7311, rue de Chartres, BP 6759, 45067 Orléans, France
| | - Maria Hideux
- Institut de Recherches Servier, 11 rue des Moulineaux, 92150 Suresnes, France
| | - Caroline West
- University of Orleans, ICOA, CNRS UMR 7311, rue de Chartres, BP 6759, 45067 Orléans, France.
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16
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Gradient supercritical fluid chromatography coupled to mass spectrometry with a gradient flow of make-up solvent for enantioseparation of cathinones. J Chromatogr A 2020; 1625:461286. [DOI: 10.1016/j.chroma.2020.461286] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 12/17/2022]
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17
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Analysis of flavonoids with unified chromatography-electrospray ionization mass spectrometry-method development and application to compounds of pharmaceutical and cosmetic interest. Anal Bioanal Chem 2020; 412:6595-6609. [PMID: 32651647 DOI: 10.1007/s00216-020-02798-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 10/23/2022]
Abstract
In this project, we aimed at analysing flavonoid-type compounds with unified chromatography (joining supercritical fluid chromatography and enhanced fluidity liquid chromatography with carbon dioxide-methanol mobile phases covering a wide range of compositions) and diode-array and electrospray ionization mass spectrometric detection (UC-DAD-ESI-MS). First, the chromatographic method was developed for 9 standard flavonoid molecules from three different families (flavanols, flavanones and flavonols, glycosylated or not), with a strong focus on mobile phase composition to achieve the elution of a wide range of flavonoids with good chromatographic quality (efficiency and resolution). For this purpose, two stationary phases were selected (ACQUITY UPC2 DEA and Diol), and five different additives (formic acid, citric acid, phosphoric acid, methanesulfonic acid and ammonium hydroxide) were successively introduced in the methanol co-solvent. The composition containing 0.1% methanesulfonic acid in methanol was retained as it provided the best chromatographic quality together with the possibility of hyphenating the chromatography to mass spectrometry. The DEA column appeared to provide the best efficiency and was retained for further method development. The gradient method was then optimized to achieve a fast analysis, which involved elution with a wide range of mobile phase composition (from 20 to 100% co-solvent in methanol) together with reversed flow rate and reversed pressure gradients at fixed temperature. The final gradient lasted 10 min, followed by 2.5 min of re-equilibration. Then, ESI-MS detection was optimized. Because the single-quadrupole mass spectrometer employed (ACQUITY UPC2 QDa) allowed the variation of only a few parameters, a design of experiments was used to define the best compromise for three parameters (probe temperature, cone voltage and capillary voltage). The make-up fluid introduced before entering the MS was also varied: different compositions of methanol-water containing either formic acid, ammonium hydroxide or sodium chloride were tested. The best results in terms of signal-to-noise ratio were obtained with methanol containing 20 mM ammonium hydroxide and 2% water. The optimal UC-DAD-ESI-MS method was then applied to two different flavonoid formulation ingredients. The first one, hidrosmin (5-O-(β-hydroxyethyl)diosmin), is known for its vasoprotective properties and therefore employed in pharmaceutical formulations. The second one, α-glucosyl-hesperidin (sometimes referred to as vitamin P), is employed in cosmetic formulations. Identification of the major compounds in each sample was achieved with the help of MS detection. Graphical abstract.
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18
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Analysis of free amino acids with unified chromatography-mass spectrometry—application to food supplements. J Chromatogr A 2020; 1616:460772. [DOI: 10.1016/j.chroma.2019.460772] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/23/2019] [Accepted: 12/04/2019] [Indexed: 02/07/2023]
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19
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Miller L, Yue L. Chiral separation of underivatized amino acids in supercritical fluid chromatography with chiral crown ether derived column. Chirality 2020; 32:981-989. [PMID: 32141123 DOI: 10.1002/chir.23204] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/07/2020] [Accepted: 02/13/2020] [Indexed: 12/17/2022]
Abstract
The supercritical fluid chromatographic separation of underivatized amino acids was explored using immobilized chiral crown ether column CROWNPAK CR-I (+) and mass spectrometric detection. The type of modifier, acidic additives, and the role of water were investigated. Enantioseparation was achieved for all 18 amino acids investigated with short retention times (less than 3 minutes) and average resolution of greater than 5.0. Analysis of enantiomerically pure standards demonstrated the D enantiomer eluted first for all amino acids using a CROWNPAK CR-I (+) column.
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Affiliation(s)
| | - Lei Yue
- Amgen Research, Amgen, Cambridge, Massachusetts
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20
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Chankvetadze B. Recent trends in preparation, investigation and application of polysaccharide-based chiral stationary phases for separation of enantiomers in high-performance liquid chromatography. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115709] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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21
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Roy D, Wahab MF, Berger TA, Armstrong DW. Ramifications and Insights on the Role of Water in Chiral Sub/Supercritical Fluid Chromatography. Anal Chem 2019; 91:14672-14680. [PMID: 31657544 DOI: 10.1021/acs.analchem.9b03908] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
More than 40 cosolvents have been used with carbon dioxide to alter its solvation strength. Among the most interesting systems is the subcritical/supercritical CO2/alkanol eluents. Using small amounts of water in CO2/MeOH is known to be beneficial in chiral subcritical/supercritical chromatography. However, the ramifications of introducing water as a cosolvent component is not entirely understood. In this work, we demonstrate important aspects of the CO2/MeOH/H2O system on nine chiral stationary phases with very different surface chemistries, encompassing derivatized polysaccharides, macrocyclic glycopeptides, iso-butylmercaptoquinine, isopropyl macrocyclic oligosaccharides, and π-electron acceptor/π-electron donor phases. A hydrophilicity scale has been shown to be useful in predicting if a given chiral column chemistry would show a significant enhancement in separation efficiency in the presence of water in the CO2/MeOH system. We demonstrate up to 8-fold enhancements in plate counts of chiral separations with a concomitant decrease in retention times, as predicted by the qualitative test. The same chiral analysis can now be completed in almost a third of the time with the addition of small amounts of water, thereby decreasing organic solvent consumption by a considerable amount. Hydrophobic stationary phases show a minimal increase in efficiency and decrease in analysis times and optimized separations show much larger reduced plate heights, compared to more hydrophilic stationary phases. Furthermore, the presence of water can alter the nature of the adsorption isotherm under nonlinear conditions. Small amounts of water can be used to tune nonlinear tailing peaks into fronting ones, significantly improving preparative enantiomeric separations.
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Affiliation(s)
- Daipayan Roy
- Department of Chemistry and Biochemistry , University of Texas at Arlington , Arlington , Texas 76029 , United States
| | - M Farooq Wahab
- Department of Chemistry and Biochemistry , University of Texas at Arlington , Arlington , Texas 76029 , United States
| | - Terry A Berger
- SFC Solutions, Inc. , Englewood , Florida 34224 , United States
| | - Daniel W Armstrong
- Department of Chemistry and Biochemistry , University of Texas at Arlington , Arlington , Texas 76029 , United States
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22
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Huang Y, Wang T, Fillet M, Crommen J, Jiang Z. Simultaneous determination of amino acids in different teas using supercritical fluid chromatography coupled with single quadrupole mass spectrometry. J Pharm Anal 2019; 9:254-258. [PMID: 31452963 PMCID: PMC6702419 DOI: 10.1016/j.jpha.2019.05.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/13/2019] [Accepted: 05/05/2019] [Indexed: 01/25/2023] Open
Abstract
Tea is a widely consumed beverage and has many important physiological properties and potential health benefits. In this study, a novel method based on supercritical fluid chromatography coupled with mass spectrometry (SFC-MS) was developed to simultaneously determine 11 amino acids in different types of tea (green teas, Oolong tea, black tea and Pu-erh tea). The separation conditions for the analysis of the selected amino acids including the column type, temperature and backpressure as well as the type of additive, were carefully optimized. The best separation of the 11 amino acids was obtained by adding water (5%, v/v) and trifluoroacetic acid (0.4%, v/v) to the organic modifier (methanol). Finally, the developed SFC-MS method was fully validated and successfully applied to the determination of these amino acids in six different tea samples. Good linearity (r ≥ 0.993), precision (RSDs ≤ 2.99%), accuracy (91.95%–107.09%) as well as good sample stability were observed. The limits of detection ranged from 1.42 to 14.69 ng/mL, while the limits of quantification were between 4.53 and 47.0 ng/mL. The results indicate that the contents of the 11 amino acids in the six different tea samples are greatly influenced by the degree of fermentation. The proposed SFC-MS method shows a great potential for further investigation of tea varieties. A SFC-MS approach was developed for the determination of amino acids. Water and trifluoroacetic acid are interesting additives for the SFC separation of amino acids. The SFC-MS method shows a good potential to differentiate the types of tea based on the content of amino acids.
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Affiliation(s)
- Yang Huang
- Institute of Pharmaceutical Analysis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- Shenzhen Institute for Drug Control, Shenzhen, China
- Department of Pharmaceutics, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
- Laboratory for the Analysis of Medicine, Department of Pharmaceutical Sciences, CIRM, University of Liege, CHU B36, B-4000 Liege, Belgium
| | - Tiejie Wang
- Shenzhen Institute for Drug Control, Shenzhen, China
| | - Marianne Fillet
- Institute of Pharmaceutical Analysis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- Laboratory for the Analysis of Medicine, Department of Pharmaceutical Sciences, CIRM, University of Liege, CHU B36, B-4000 Liege, Belgium
| | - Jacques Crommen
- Institute of Pharmaceutical Analysis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- Laboratory for the Analysis of Medicine, Department of Pharmaceutical Sciences, CIRM, University of Liege, CHU B36, B-4000 Liege, Belgium
| | - Zhengjin Jiang
- Institute of Pharmaceutical Analysis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- Corresponding author.
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23
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Kostenko MO, Ustinovich KB, Pokrovskiy OI, Parenago OO, Bazarnova NG, Lunin VV. Effect of the Mobile Phase Composition on Selectivity in Supercritical Fluid Chromatography in the Separation of Salbutamol Enantiomers. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2019. [DOI: 10.1134/s1990793118070059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Evaluation of polysaccharide-based chiral stationary phases in modern SFC-MS/MS for enantioselective bioanalysis. Bioanalysis 2019; 11:251-266. [PMID: 30672314 DOI: 10.4155/bio-2018-0168] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Aim: The applicability of polysaccharide-based chiral stationary phases in modern supercritical fluid chromatography (SFC)-MS/MS for chiral bioanalysis was evaluated. Materials & methods: Ten popular polysaccharide-based chiral stationary phases (CSPs) were tested using a set of 23 drugs against three cosolvents. The effect of temperature and backpressure on separation was examined. Results: The recommended order of CSPs for screening was determined. Methanol with 0.1% NH4OH is proven to be the first choice of cosolvent. Temperature of 40°C and backpressure of 10 or 15 MPa are recommended starting conditions. Phospholipid elution profiles on the polysaccharide-based CSPs were reported for the first time under SFC conditions. Conclusion: A simplified screening protocol with straightforward method optimization approaches was generated for SFC chiral assay development in a reasonable time frame with a high success rate.
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25
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Lipka E, Dascalu AE, Messara Y, Tsutsqiridze E, Farkas T, Chankvetadze B. Separation of enantiomers of native amino acids with polysaccharide-based chiral columns in supercritical fluid chromatography. J Chromatogr A 2019; 1585:207-212. [DOI: 10.1016/j.chroma.2018.11.049] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/14/2018] [Accepted: 11/20/2018] [Indexed: 11/15/2022]
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26
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Wu D, Cai P, Zhao X, Pan Y. Enantioselective Precipitate of Amines, Amino Alcohols, and Amino Acids via Schiff Base Reaction in the Presence of Chiral Ionic Liquid. Org Lett 2017; 19:5018-5021. [DOI: 10.1021/acs.orglett.7b01935] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Datong Wu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Pengfei Cai
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Xiaoyong Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yuanjiang Pan
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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27
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Speybrouck D, Doublet C, Cardinael P, Fiol-Petit C, Corens D. The effect of high concentration additive on chiral separations in supercritical fluid chromatography. J Chromatogr A 2017; 1510:89-99. [DOI: 10.1016/j.chroma.2017.06.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/15/2017] [Accepted: 06/16/2017] [Indexed: 11/17/2022]
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28
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29
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Gumustas M, Ozkan SA, Chankvetadze B. Separation and elution order of the enantiomers of some β-agonists using polysaccharide-based chiral columns and normal phase eluents by high-performance liquid chromatography. J Chromatogr A 2016; 1467:297-305. [DOI: 10.1016/j.chroma.2016.08.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 10/21/2022]
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30
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Geryk R, Kalíková K, Schmid MG, Tesařová E. Enantioselective separation of biologically active basic compounds in ultra-performance supercritical fluid chromatography. Anal Chim Acta 2016; 932:98-105. [DOI: 10.1016/j.aca.2016.04.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/19/2016] [Accepted: 04/23/2016] [Indexed: 10/21/2022]
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31
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Lemasson E, Bertin S, West C. Use and practice of achiral and chiral supercritical fluid chromatography in pharmaceutical analysis and purification. J Sep Sci 2016; 39:212-33. [DOI: 10.1002/jssc.201501062] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 10/21/2015] [Accepted: 10/21/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Elise Lemasson
- Institut de Chimie Organique et Analytique (ICOA); Univ Orleans, CNRS; Orléans cedex France
| | | | - Caroline West
- Institut de Chimie Organique et Analytique (ICOA); Univ Orleans, CNRS; Orléans cedex France
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32
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Eom HY, Kang M, Kang SW, Kim U, Suh JH, Kim J, Cho HD, Jung Y, Yang DH, Han SB. Rapid chiral separation of racemic cetirizine in human plasma using subcritical fluid chromatography-tandem mass spectrometry. J Pharm Biomed Anal 2016; 117:380-9. [DOI: 10.1016/j.jpba.2015.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/11/2015] [Accepted: 09/13/2015] [Indexed: 10/23/2022]
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33
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Lemasson E, Bertin S, Hennig P, Boiteux H, Lesellier E, West C. Development of an achiral supercritical fluid chromatography method with ultraviolet absorbance and mass spectrometric detection for impurity profiling of drug candidates. Part I: Optimization of mobile phase composition. J Chromatogr A 2015. [DOI: 10.1016/j.chroma.2015.07.037] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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The many faces of packed column supercritical fluid chromatography – A critical review. J Chromatogr A 2015; 1382:2-46. [DOI: 10.1016/j.chroma.2014.12.083] [Citation(s) in RCA: 282] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 12/15/2014] [Accepted: 12/30/2014] [Indexed: 01/01/2023]
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35
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Perrenoud AGG, Farrell WP, Aurigemma CM, Aurigemma NC, Fekete S, Guillarme D. Evaluation of stationary phases packed with superficially porous particles for the analysis of pharmaceutical compounds using supercritical fluid chromatography. J Chromatogr A 2014; 1360:275-87. [DOI: 10.1016/j.chroma.2014.07.078] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 07/23/2014] [Accepted: 07/24/2014] [Indexed: 11/27/2022]
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36
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Płotka JM, Biziuk M, Morrison C, Namieśnik J. Pharmaceutical and forensic drug applications of chiral supercritical fluid chromatography. Trends Analyt Chem 2014. [DOI: 10.1016/j.trac.2013.12.012] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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37
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Supercritical fluid chromatography as a tool for enantioselective separation; A review. Anal Chim Acta 2014; 821:1-33. [DOI: 10.1016/j.aca.2014.02.036] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/31/2014] [Accepted: 02/22/2014] [Indexed: 12/14/2022]
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38
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Samimi R, Xu WZ, Alsharari Q, Charpentier PA. Supercritical fluid chromatography of North American ginseng extract. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2013.12.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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39
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On the effect of basic and acidic additives on the separation of the enantiomers of some basic drugs with polysaccharide-based chiral selectors and polar organic mobile phases. J Chromatogr A 2013; 1317:167-74. [DOI: 10.1016/j.chroma.2013.08.029] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 08/02/2013] [Accepted: 08/07/2013] [Indexed: 11/21/2022]
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40
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Updating a generic screening approach in sub- or supercritical fluid chromatography for the enantioresolution of pharmaceuticals. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.04.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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41
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Strong cation exchange-type chiral stationary phase for enantioseparation of chiral amines in subcritical fluid chromatography. J Chromatogr A 2013; 1289:94-104. [DOI: 10.1016/j.chroma.2013.03.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Revised: 03/09/2013] [Accepted: 03/11/2013] [Indexed: 11/19/2022]
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42
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Natalini B, Sardella R, Ianni F, García-Rubiño ME, Conejo-García A, Núñez MDC, Gallo MA, Campos JM. Chromatographic Enantioresolution of Six Purine Derivatives Endowed with Anti-Human Breast Cancer Activity. Chromatographia 2013. [DOI: 10.1007/s10337-013-2398-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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Chankvetadze B. Recent developments on polysaccharide-based chiral stationary phases for liquid-phase separation of enantiomers. J Chromatogr A 2012; 1269:26-51. [DOI: 10.1016/j.chroma.2012.10.033] [Citation(s) in RCA: 329] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/11/2012] [Accepted: 10/15/2012] [Indexed: 10/27/2022]
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44
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Enantioselectivity of polysaccharide-based chiral stationary phases in supercritical fluid chromatography using methanol-containing carbon dioxide mobile phases. J Chromatogr A 2012; 1269:336-45. [DOI: 10.1016/j.chroma.2012.07.090] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 07/25/2012] [Accepted: 07/29/2012] [Indexed: 11/23/2022]
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45
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De Klerck K, Mangelings D, Vander Heyden Y. Supercritical fluid chromatography for the enantioseparation of pharmaceuticals. J Pharm Biomed Anal 2012; 69:77-92. [DOI: 10.1016/j.jpba.2012.01.021] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/18/2012] [Accepted: 01/19/2012] [Indexed: 11/30/2022]
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46
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Miller L. Preparative enantioseparations using supercritical fluid chromatography. J Chromatogr A 2012; 1250:250-5. [DOI: 10.1016/j.chroma.2012.05.025] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 05/06/2012] [Accepted: 05/07/2012] [Indexed: 11/26/2022]
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47
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Ren-Qi W, Teng-Teng O, Siu-Choon N, Weihua T. Recent advances in pharmaceutical separations with supercritical fluid chromatography using chiral stationary phases. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2012.02.012] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Combined use of isopropylamine and trifluoroacetic acid in methanol-containing mobile phases for chiral supercritical fluid chromatography. J Chromatogr A 2012; 1234:72-9. [DOI: 10.1016/j.chroma.2011.11.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 11/03/2011] [Accepted: 11/13/2011] [Indexed: 11/22/2022]
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49
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Supercritical fluid chromatographic resolution of water soluble isomeric carboxyl/amine terminated peptides facilitated via mobile phase water and ion pair formation. J Chromatogr A 2012; 1233:85-90. [DOI: 10.1016/j.chroma.2012.02.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 02/09/2012] [Indexed: 10/28/2022]
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50
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Patel M, Riley F, Wang J, Lovdahl M, Taylor L. Packed column supercritical fluid chromatography of isomeric polypeptide pairs. J Chromatogr A 2011; 1218:2593-7. [DOI: 10.1016/j.chroma.2011.03.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 03/01/2011] [Accepted: 03/07/2011] [Indexed: 10/18/2022]
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