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Muhire J, Sun X, Zhang FX, Huang XY, Di DL. Recent trends in multidimensional countercurrent chromatography. J Sep Sci 2024; 47:e2300768. [PMID: 38356228 DOI: 10.1002/jssc.202300768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/28/2023] [Accepted: 12/05/2023] [Indexed: 02/16/2024]
Abstract
Countercurrent chromatography (CCC) is a potent separation approach known for its remarkable efficiency and capacity in preparation. It's applied as a substitute or combined with different chromatographic techniques, resulting in its rebranding as multidimensional CCC (MDCCC). Numerous essential mixtures from natural products contain hundreds or thousands of distinct components of importance. These mix types are too complicated to separate in any reasonable time using a single CCC dimension. However, if a multidimensional technique is utilized, where a complex mixture is separated by an initial dimension, smaller fractions of that separation are gathered. Each fraction is studied individually; complex mixes can be resolved relatively quickly. Thus, several MDCCC separation features have been studied to demonstrate their advantages, limitations, and prospective capacity to separate exceedingly complex mixtures. In this review, MDCCC aspects, including principles, multiple columns system, multilayer coil J-type, on-line monitoring system, and applications, have been thoroughly_explored.
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Affiliation(s)
- Jules Muhire
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory of Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Xiao Sun
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory of Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Fu-Xin Zhang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory of Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Xin-Yi Huang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory of Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Duo-Long Di
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory of Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
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Müller F, Conrad J, Hammerschick T, Vetter W. Enrichment and structural assignment of geometric isomers of unsaturated furan fatty acids. Anal Bioanal Chem 2023; 415:6333-6343. [PMID: 37599331 PMCID: PMC10558370 DOI: 10.1007/s00216-023-04908-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 08/22/2023]
Abstract
Furan fatty acids (FuFAs) are valuable minor fatty acids, which are known for their excellent radical scavenging properties. Typically, the furan moiety is embedded in an otherwise saturated carboxyalkyl chain. Occasionally, these classic FuFAs are accompanied by low amounts of unsaturated furan fatty acids (uFuFAs), which additionally feature one double bond in conjugation with the furan moiety. A recent study produced evidence for the occurrence of two pairs of E-/Z-uFuFA isomers structurally related to saturated uFuFAs. Here, we present a strategy that allowed such trace compounds to be enriched to a level suited for structure determination by NMR. Given the low amounts and the varied abundance ratio of the four uFuFA isomers, the isolation of individual compounds was not pursued. Instead, the entire isomer mixture was enriched to an amount and purity suitable for structure investigation with contemporary NMR methods. Specifically, lipid extracted from 150 g latex, the richest known source of FuFAs, was subsequently fractionated by countercurrent chromatography (CCC), silver ion, and silica gel column chromatography. Analysis of the resulting mixture of four uFuFAs isomers (2.4 mg in an abundance ratio of 56:23:11:9) by different NMR techniques including PSYCHE verified that the structures of the two most abundant isomers were E-9-(3-methyl-5-pentylfuran-2-yl)non-8-enoic acid and E-9-(3-methyl-5-pent-1-enylfuran-2-yl)nonanoic acid. Additionally, we introduced a computer-based method to generate an averaged chromatogram from freely selectable GC/MS runs of CCC fractions without the necessity of pooling aliquots. This method was found to be suitable to simplify subsequent enrichment steps.
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Affiliation(s)
- Franziska Müller
- Department of Food Chemistry (170b), Institute of Food Chemistry, University of Hohenheim, Garbenstr. 28, Stuttgart, 70599, Germany
| | - Jürgen Conrad
- Department of Bioorganic Chemistry (130b), Institute of Chemistry, University of Hohenheim, Garbenstr. 30, Stuttgart, 70599, Germany
| | - Tim Hammerschick
- Department of Food Chemistry (170b), Institute of Food Chemistry, University of Hohenheim, Garbenstr. 28, Stuttgart, 70599, Germany
| | - Walter Vetter
- Department of Food Chemistry (170b), Institute of Food Chemistry, University of Hohenheim, Garbenstr. 28, Stuttgart, 70599, Germany.
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Schlag S, Bräckle Y, Jelečević M, Vetter W. Gas chromatography with mass spectrometry analysis of 4,4-dimethylsterols and 4-methylsterols in edible oils after their enrichment by means of solid phase extraction. J Chromatogr A 2023; 1705:464166. [PMID: 37356364 DOI: 10.1016/j.chroma.2023.464166] [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: 04/17/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/27/2023]
Abstract
4-Methylsterols (4-M-sterols) and 4,4-dimethylsterols (4,4-D-sterols) are a group of underexplored minor sterols that occur in almost all living organisms. Here, we developed a strategy for the determination of the biochemical precursors of the predominant 4-desmethylsterols in edible oils. Due to their low contribution to the sterol content in the samples, a solid phase extraction (SPE) method was developed for the enrichment of 4-M- and 4,4-D-sterols in the hexane extracts of saponified oils. In a two-fold SPE procedure, the bulk of 4,4-D-sterols was collected in one fraction. The residual sample was subjected to a second SPE step which targeted all 4-M-sterols and low shares of 4,4-D-sterols in one fraction and the predominant 4-desmethylsterols in another one. After silylation of the SPE fractions, gas chromatography with mass spectrometry (GC/MS) was used to analyze 4,4-D- and 4-M-sterols. The results were used to define eight subgroups whose characteristic structural features could be linked with the presence of specific m/z values. These m/z values were measured sensitively by GC/MS operated in selected ion monitoring (SIM) mode. Application of the GC/MS method to eighteen edible oils enabled the detection of 55 mostly very low abundant 4-M- and 4,4-D-sterols. Twenty-four of the 4-M- and 4,4-D-sterols could be assigned and the remaining 31 unknown sterols could be traced back to their basic structures.
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Affiliation(s)
- Sarah Schlag
- Institute of Food Chemistry (170b), University of Hohenheim, Garbenstraße 28, Stuttgart D-70599, Germany
| | - Yvonne Bräckle
- Institute of Food Chemistry (170b), University of Hohenheim, Garbenstraße 28, Stuttgart D-70599, Germany
| | - Marina Jelečević
- Institute of Food Chemistry (170b), University of Hohenheim, Garbenstraße 28, Stuttgart D-70599, Germany
| | - Walter Vetter
- Institute of Food Chemistry (170b), University of Hohenheim, Garbenstraße 28, Stuttgart D-70599, Germany.
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Hammerschick T, Vetter W. Profiling and Isolation of Ten Rare Branched-Chain Alkylresorcinols in Quinoa. Molecules 2023; 28:5220. [PMID: 37446882 DOI: 10.3390/molecules28135220] [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: 05/12/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Alkylresorcinols (∑ARs) are bioactive lipid compounds predominantly found in cereals. These amphiphilic compounds exist in a high structural diversity and can be divided into two main groups, i.e., 5-alkylresorcinols (ARs) and 2-methyl-5-alkylresorcinols (mARs). The pseudocereal quinoa has a very unique AR profile, consisting not only of straight-chain alkyl chains but also iso- and anteiso-branched isomers. Here, we describe a method for the isolation of such methyl-branched ARs and mARs from quinoa. The enrichment of the ∑AR fraction from the lipid extracts by centrifugal partition chromatography (CPC) was followed by ∑AR profiling using countercurrent chromatography (CCC) and GC/MS analysis of CCC fractions. A total of 112 ∑ARs could be detected, 63 of which had not been previously described in quinoa. Due to this high number of ∑ARs, the direct isolation of individual ARs was not possible using conventional CCC. Instead, the more powerful heart-cut mode was applied to enrich the target compounds. A final purification step-the separation of CCC-co-eluting mARs from ARs -was performed via silver ion chromatography. Altogether, ten rare branched-chain ∑ARs (five iso-branched mARs and five anteiso-branched ARs, including mAR19:0-i and AR20:0-a) were isolated with purities up to 98% in the double-digit mg range.
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Affiliation(s)
- Tim Hammerschick
- Institute of Food Chemistry, University of Hohenheim, D-70599 Stuttgart, Germany
| | - Walter Vetter
- Institute of Food Chemistry, University of Hohenheim, D-70599 Stuttgart, Germany
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Wen W, Xu P, Xiang H, Wen M, Ye X, Chu C, Tong S. Comprehensive two-dimensional countercurrent chromatography × gas chromatography characterization of Artemisia argyi essential oil. Anal Chim Acta 2022; 1237:340614. [DOI: 10.1016/j.aca.2022.340614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/10/2022] [Accepted: 11/10/2022] [Indexed: 11/15/2022]
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Rüttler F, Hammerschick T, Schlag S, Vetter W. Isolation of lanosterol and dihydrolanosterol from the unsaponifiable matter of lanolin by urea complexation and countercurrent chromatography in heart-cut recycling mode. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1210:123470. [PMID: 36191441 DOI: 10.1016/j.jchromb.2022.123470] [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: 05/24/2022] [Revised: 08/30/2022] [Accepted: 09/12/2022] [Indexed: 10/31/2022]
Abstract
4,4-Dimethyl-substituted sterols are bioactive minor sterols of most animal fats and plant oils, but higher shares are present in lanolin (wool grease). Here, the isolation of the 4,4-dimethyl-substituted sterols dihydrolanosterol and lanosterol from lanolin by countercurrent chromatography (CCC) is described. An initial examination of the hexane extract of saponified lanolin showed the presence of relatively high portions of fatty alcohols which were known to co-elute with the target analytes in CCC. Hence, fatty alcohols were precipitated by urea complexation. Unexpectedly, 4,4-dimethyl-substituted sterols were also found in the crystalline fraction, while cholesterol and other desmethylsterols were detected in the liquid phase. Urea complexation represented a useful preparative method for the separation of desmethylsterols and 4,4-dimethyl-substituted sterols from lanolin. Shake flask experiments of 4,4-dimethyl-substituted sterols and fatty alcohols with 14 biphasic solvent systems indicated suitable partition coefficients (K values) with n-hexane/ethanol/water (12:8:1, v/v/v) and n-hexane/benzotrifluoride/acetonitrile (20:7:13, v/v/v). After initial tests with conventional CCC, the application of CCC in heart-cut recycling mode provided 4,4-dimethyl-substituted sterols with purities of 99 % (dihydrolanosterol) and 95 % (lanosterol).
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Affiliation(s)
- Felix Rüttler
- University of Hohenheim, Institute of Food Chemistry, Department of Food Chemistry (170b), Garbenstraße 28, D-70599 Stuttgart, Germany
| | - Tim Hammerschick
- University of Hohenheim, Institute of Food Chemistry, Department of Food Chemistry (170b), Garbenstraße 28, D-70599 Stuttgart, Germany
| | - Sarah Schlag
- University of Hohenheim, Institute of Food Chemistry, Department of Food Chemistry (170b), Garbenstraße 28, D-70599 Stuttgart, Germany
| | - Walter Vetter
- University of Hohenheim, Institute of Food Chemistry, Department of Food Chemistry (170b), Garbenstraße 28, D-70599 Stuttgart, Germany.
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Sun HM, Zhang AL, Bao HL, Chu C, Tong SQ. In Silico Screening of Off-line Comprehensive Two-Dimensional Counter-current Chromatography with Liquid Chromatography for Four Saponins Isolation. J Sep Sci 2022; 45:3909-3918. [PMID: 35962755 DOI: 10.1002/jssc.202200395] [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: 05/13/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 11/11/2022]
Abstract
Be restrained by the limited peak capacity, one dimension chromatography usually leads to an unsatisfactory separation with low purity of compounds in a complex mixture. To obtain more highly pure targets for standard reference and to discover new substances for structural elucidation, two-dimensional chromatography is more and more prevalent in many fields. As few metrics on assessment of preparative capability of two-dimensional chromatographic separations is reported, a methodology of in silico screening of various two-dimensional chromatographic separations with a minimal number of experiments was demonstrated in this work, which was based on three descriptors including the occupation rate of peaks and system homogeneity of a two-dimensional separation space, and the minimal distance of all nearest-neighbor distances of peaks. Combining the advantages of counter-current chromatography and liquid chromatography, we elaborated the methodology by employing off-line comprehensive two-dimensional counter-current chromatography with liquid chromatography to be in silico screened for separation of four saponins from Panax notoginseng at analytical scale to simulate the case of preparative scale transfer. The predictive results were presented by two-dimensional contour plots and verified by experiments. The result showed that the experimental results were in general accord with the predictive results. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Heng-Mian Sun
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Ai-Lian Zhang
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A&F University
| | - Hong-Lei Bao
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Chu Chu
- College of Pharmaceutical Science, Zhejiang University of Technology
| | - Sheng-Qiang Tong
- College of Pharmaceutical Science, Zhejiang University of Technology
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Online hyphenation of centrifugal partition chromatography with countercurrent chromatography (CPC-CCC) and its application to the separation of saturated alkylresorcinols. Anal Bioanal Chem 2022; 414:5043-5051. [PMID: 35639138 PMCID: PMC9234026 DOI: 10.1007/s00216-022-04136-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/12/2022] [Accepted: 05/16/2022] [Indexed: 11/08/2022]
Abstract
Centrifugal partition chromatography (CPC) and countercurrent chromatography (CCC) are two preparative techniques mainly used for the isolation and purification of natural products. While CPC benefits from a larger sample capacity, CCC typically provides better peak resolutions and hereby higher purities. In this study, we aimed to combine both advantages by the direct linking of CPC and CCC which was achieved by installation of switching valves and connection tube. The hyphenated CPC-CCC setup was tested with major alkylresorcinols which were obtained from a transesterified and hydrogenated rye extract. Injections of 1- and 5-g samples into the individual CCC system confirmed the limited sample capacity because of immediate flooding with the 5-g sample (total loss of stationary phase). In comparison, the CPC system was stable with 5- and 10-g samples but the peak resolution with 1-g sample was poorer than with the CCC system. Injections of 5- and 10-g samples into the CPC-CCC system were successful. However, a sample load of 10 g resulted in lower purities of the alkylresorcinols (80% or less) due to peak tailing. By contrast, injection of 5-g sample provided high amounts of ~ 1.2 g alkylresorcinols with purities of > 95%.
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Kröpfl A, Nemetz NJ, Goncalves Peca A, Vetter W. Countercurrent chromatography isolation of 11′‐γ‐tocomonoenol from pumpkin seed oil with detection of novel minor tocochromanols. J AM OIL CHEM SOC 2022. [DOI: 10.1002/aocs.12559] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexander Kröpfl
- Department of Food Chemistry (170b) Institute of Food Chemistry, University of Hohenheim Stuttgart Germany
| | - Nicole Jasmin Nemetz
- Department of Food Chemistry (170b) Institute of Food Chemistry, University of Hohenheim Stuttgart Germany
| | - Andrea Goncalves Peca
- Department of Food Chemistry (170b) Institute of Food Chemistry, University of Hohenheim Stuttgart Germany
| | - Walter Vetter
- Department of Food Chemistry (170b) Institute of Food Chemistry, University of Hohenheim Stuttgart Germany
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Morley R, Minceva M. Liquid-Liquid Chromatography: Current Design Approaches and Future Pathways. Annu Rev Chem Biomol Eng 2021; 12:495-518. [PMID: 33848424 DOI: 10.1146/annurev-chembioeng-101420-033548] [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: 11/09/2022]
Abstract
Since its first appearance in the 1960s, solid support-free liquid-liquid chromatography has played an ever-growing role in the field of natural products research. The use of the two phases of a liquid biphasic system, the mobile and stationary phases, renders the technique highly versatile and adaptable to a wide spectrum of target molecules, from hydrophobic to highly polar small molecules to proteins. Generally considered a niche technique used only for small-scale preparative separations, liquid-liquid chromatography currently lags far behind conventional liquid-solid chromatography and liquid-liquid extraction in process modeling and industrial acceptance. This review aims to expose a broader audience to this high-potential separation technique by presenting the wide variety of available operating modes and solvent systems as well as structured, model-based design approaches. Topics currently offering opportunities for further investigation are also addressed.
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Affiliation(s)
- Raena Morley
- Biothermodynamics, TUM School of Life Sciences Weihenstephan, Technical University of Munich, 85354 Freising, Germany; ,
| | - Mirjana Minceva
- Biothermodynamics, TUM School of Life Sciences Weihenstephan, Technical University of Munich, 85354 Freising, Germany; ,
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Hammerschick T, Wagner T, Vetter W. Isolation of saturated alkylresorcinols from rye grains by countercurrent chromatography. J Sep Sci 2021; 44:1904-1912. [PMID: 33655655 DOI: 10.1002/jssc.202001230] [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] [Received: 12/11/2020] [Revised: 02/15/2021] [Accepted: 02/26/2021] [Indexed: 11/05/2022]
Abstract
Alkylresorcinols (5-alkyl-1,3-dihydroxybenzenes) are amphiphilic phenolic lipid compounds that are abundant in cereals with highest contents in rye. Alkylresorcinols are suspected to show a wide range of favourable biological activities. For such and further testing, highly pure alkylresorcinol standards are required. Especially, purities >> 98% were partly difficult to obtain in the past. Here, we aimed to isolate the most abundant (saturated) alkylresorcinols from rye using countercurrent chromatography. To achieve very high purity, alkylresorcinol-containing extract (∼7.14 g) of rye grains (cold extracts with cyclohexane/ethyl acetate (46/54, w/w)) were preparatively transesterified followed by a preparative hydrogenation. Countercurrent chromatography separation of ∼1 g hydrogenated and transesterified rye grain extract using the solvent system n-hexane-ethyl acetate-methanol-water (9:1:9:1, v/v/v/v) yielded 51.8 mg AR17:0, 77.4 mg AR19:0, 57.2 mg AR21:0, 28.8 mg AR23:0 and 11.5 mg AR25:0 with purities >99% in either case. The isolated alkylresorcinol homologues can be used for subsequent bioassays.
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Affiliation(s)
- Tim Hammerschick
- Department of Food Chemistry (170b), Institute of Food Chemistry, University of Hohenheim, Stuttgart, Germany
| | - Tim Wagner
- Department of Food Chemistry (170b), Institute of Food Chemistry, University of Hohenheim, Stuttgart, Germany
| | - Walter Vetter
- Department of Food Chemistry (170b), Institute of Food Chemistry, University of Hohenheim, Stuttgart, Germany
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12
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Theoretical study of industrial scale closed-loop recycling counter-current chromatography separations. J Chromatogr A 2020; 1633:461630. [DOI: 10.1016/j.chroma.2020.461630] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 10/09/2020] [Accepted: 10/14/2020] [Indexed: 01/19/2023]
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13
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Wiedmaier‐Czerny N, Müller M, Vetter W. Heart‐Cut Two‐Dimensional Countercurrent Chromatography for the Isolation of a Furan Fatty Acid Triacylglycerol from Latex Gloves and Identification of Further Lipid Compounds. J AM OIL CHEM SOC 2020. [DOI: 10.1002/aocs.12333] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nina Wiedmaier‐Czerny
- Department of Food Chemistry (170b), Institute of Food ChemistryUniversity of Hohenheim Stuttgart D‐70593 Germany
| | - Marco Müller
- Department of Food Chemistry (170b), Institute of Food ChemistryUniversity of Hohenheim Stuttgart D‐70593 Germany
| | - Walter Vetter
- Department of Food Chemistry (170b), Institute of Food ChemistryUniversity of Hohenheim Stuttgart D‐70593 Germany
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14
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Wang X, Zhao S, Wang C, Sun W, Jin Y, Gong X, Tong S. Off‐line comprehensive two‐dimensional reversed‐phase countercurrent chromatography with high‐performance liquid chromatography: Orthogonality in separation of
Polygonum cuspidatum
Sieb. et Zucc. J Sep Sci 2019; 43:561-568. [DOI: 10.1002/jssc.201900877] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/06/2019] [Accepted: 10/29/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Xiang Wang
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310032 P. R. China
| | - Shanshan Zhao
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310032 P. R. China
| | - Chaoyue Wang
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310032 P. R. China
| | - Wenyu Sun
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310032 P. R. China
| | - Yang Jin
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310032 P. R. China
| | - Xingchu Gong
- Pharmaceutical Informatics Institute, College of Pharmaceutical SciencesZhejiang University Hangzhou 310023 P. R. China
| | - Shengqiang Tong
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310032 P. R. China
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The 10th international conference on countercurrent chromatography held at Technische Universität Braunschweig, Braunschweig, Germany, August 1-3, 2018. J Chromatogr A 2019; 1617:460698. [PMID: 31810622 DOI: 10.1016/j.chroma.2019.460698] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The 10th International Countercurrent Chromatography Conference (CCC 2018) was held at Technische Universität Braunschweig, Germany, from August 1st-3rd, 2018. The presentations in the scientific program demonstrated the progress in the field of countercurrent chromatography (CCC) and centrifugal partition chromatography (CPC) in recent years and numerous applications have impressively proven the potential of this all-liquid separation technique not only for academic research but also for industry. Special highlights of the conference were the celebration of the 90th birthday of Dr. Yoichiro Ito, the pioneer of countercurrent chromatography, as well as the foundation of an international "Society of Partition and Countercurrent Chromatography (SPCC)".
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16
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Kostanyan AE, Galieva ZN. Modeling of closed-loop recycling dual-mode counter-current chromatography based on non-ideal recycling model. J Chromatogr A 2019; 1603:240-250. [PMID: 31221429 DOI: 10.1016/j.chroma.2019.06.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/21/2019] [Accepted: 06/10/2019] [Indexed: 12/13/2022]
Abstract
Closed-loop recycling dual-mode counter-current chromatography (CLR DM CCC) includes two separation stages: 1 - closed-loop recycling separation of solutes with mobile x-phase (CLR CCC); 2 - separation of solutes with the mobile y-phase in the opposite flow direction. Previous analysis of CLR DM CCC separations has been limited to the ideal recycling model, which neglects extra-column dispersion. In this study, the analysis of CLR CCC separations is based on the non-ideal recycling model, which takes into account the extra-column dispersion caused by the recycling system. This is of great practical importance, since by selecting the optimal parameters of the recycling system the separation can be significantly improved. Comparative analysis of CLR CCC and CLR DM CCC separations has shown that at low separations factors compounds with low partition coefficients can be separated by CLR CCC using recycling systems with a long recycling line; the separation of compounds with high partition coefficients and the separation of complex mixtures can be performed by CLR DM CCC. Simple equations for simulation and design of CLR DM CCC separations are developed. Several variants of the implementation of this separation method are discussed; examples of simulation are presented in "Mathcad" program.
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Affiliation(s)
- Artak E Kostanyan
- Kurnakov Institute of General & Inorganic Chemistry, Russian Academy of Sciences, Leninsky, Prospekt 31, Moscow, 119991, Russia.
| | - Zhanetta N Galieva
- Laboratory of innovation technologies, LLC. (LIT LLC), Korolev, 141090, Russia
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17
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Malca Garcia GR, Friesen JB, Liu Y, Nikolić D, Lankin DC, McAlpine JB, Chen SN, Pauli GF. Preparation of DESIGNER extracts of red clover (Trifolium pratense L.) by centrifugal partition chromatography. J Chromatogr A 2019; 1605:360277. [PMID: 31307793 DOI: 10.1016/j.chroma.2019.05.057] [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] [Received: 03/25/2019] [Revised: 05/23/2019] [Accepted: 05/28/2019] [Indexed: 01/04/2023]
Abstract
Starting with an isoflavone-rich red clover extract (RCE), this study expands on the DESIGNER approach to Deplete and Enrich Select Ingredients to Generate Normalized Extract Resources using countercurrent separation (CCS) methodology. A hydrostatic CCS (also known as centrifugal partition chromatography, CPC) technique was used to enrich and deplete selected bioactive isoflavones of RCE extracts. In order to efficiently prepare large enough DESIGNER extracts from RCE for biological testing including in vivo assays, it was necessary to choose a balance between resolution and a loading capacity of at least 1 g per separation for the selected solvent system (SS). Adding 3 mL of DMSO to the sample containing equal amounts of upper and lower phases of hexanes-ethyl acetate-methanol-water (HEMWat 5.5/4.5/5/5, v/v) allowed 1 g of RCE to be dissolved in the sample without disrupting the chromatographic resolution of the target isoflavones. CPC experiments using other solubility modifiers, acetone and acetonitrile indicated that these modifiers increase solubility significantly, even better than DMSO, but the separation of target compounds was sufficiently disturbed to be unacceptable for producing the desired DESIGNER extracts. The preparation of DESIGNER extracts was achieved with two sequential CPC separations. The first produced a biochanin A enriched fraction (93.60% w/w) with only small amounts of other isoflavones: 2.30% w/w prunetin, 1.17% w/w formononetin, and 0.12% w/w irilone. Gravimetric investigations of this step demonstrated the high efficiency of CCS technology for full and unbiased sample recovery, confirmed experimentally to be 99.80%. A formononetin enriched fraction from this first separation was re-chromatographed on a more polar HEMWat (4/6/4/6, v/v) SS to produce a formononetin enriched DESIGNER fraction of 94.70% w/w purity. The presence of the minor (iso)flavonoids: 3.16% w/w pseudobaptigenin, 0.39% w/w kaempferol, and 0.31% w/w genistein was also monitored in these fractions. Chromatographic fractions, combined fractions, and DESIGNER extracts were analyzed with quantitative 1H NMR (qHNMR) spectroscopy which provided purity information, quantitation, and structural identification of the components.
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Affiliation(s)
- Gonzalo R Malca Garcia
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA
| | - J Brent Friesen
- Center for Natural Product Technologies (CENAPT), Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA; Physical Sciences Department, Rosary College of Arts and Sciences, Dominican University, 7900 W. Division, River Forest, IL 60305, USA
| | - Yang Liu
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA
| | - Dejan Nikolić
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA
| | - David C Lankin
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA
| | - James B McAlpine
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA
| | - Guido F Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA; Center for Natural Product Technologies (CENAPT), Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL 60612, USA.
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