1
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Functionalized multi-walled carbon nanotube thin-layered hollow fiber membrane for enantioselective permeation of racemic β-substituted-α-amino acids. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02076-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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2
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Miao P, Zhang L, Zhang J, Ma M, Du Y, Gan J, Yang J. Metal organic framework- modified monolithic column immobilized with pepsin for enantioseparation in capillary electrochromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1203:123306. [DOI: 10.1016/j.jchromb.2022.123306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 04/26/2022] [Accepted: 05/13/2022] [Indexed: 01/19/2023]
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3
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Amide functionalized DWCNT nanocomposite membranes for chiral separation of the racemic DOPA. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119704] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Fu Q, Yang L, Wang Q. [Development of a portable micro-liquid chromatograph]. Se Pu 2021; 39:1030-1037. [PMID: 34486843 PMCID: PMC9404123 DOI: 10.3724/sp.j.1123.2021.06029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Portable analytical instruments find extensive application in on-site examination because of their significant advantages: these instruments are convenient and easy-to-carry, leading to high time-effectiveness, and involve low reagent consumption. We report a portable micro-liquid chromatograph (p-μLC) that was designed and fabricated in our laboratory. The p-μLC integrates homemade dual large-thrust syringe pumps for delivering the mobile phase, a capillary polymer monolithic column as the stationary phase for the separation of the target analytes, and a specially designed dual-functional optical-fiber microflow-cell for online detection. The dual-thrust syringe pumps can realize isocratic and/or gradient elution as well as reloading of the mobile phase, with flow rates ranging from 0.025 μL/min to 5.6 mL/min and the maximum working pressure of 4.5 MPa. The polymethacrylate based C-18 monolithic column facilitates the separation of small organic molecules and biomacromolecules. A homemade high-power light emission diode (LED) light source and a modified xenon flash lamp are assembled as the light source module. The dual-functional detector consists of an optical fiber microflow-cell with a self-focusing lens and a light-guiding capillary, light source module, and a small-sized grating spectrometer with an output wavelength range of 400-680 nm for the LED light source and 220-700 nm for the xenon flash lamp, enabling online detection of the absorption and fluorescence spectra of the analytes from 220 to 700 nm. A bifurcated optical fiber bundle is prepared and used to connect the light source, microflow-cell, and grating spectrometer so that the incident light leading-in and the fluorescence/scatting light leading-out can be realized simultaneously. The junction end of the bifurcated optical fiber bundles connects to one end of the light path of the microflow-cell, and a straight-through optical fiber connects another end of the microflow-cell. In the UV-Vis absorption mode, the straight-through optical fiber reads out the transmitted light, while in the fluorescence mode, the excitation light beam from the light source irradiates the sample solution in the flow-cell via one branch of the bifurcated optic fiber bundles. The fluorescence leading-out via the other branch of the bifurcated optical fiber bundles in the opposite direction of the excitation light beam is read out by the spectrometer. All the large-thrust syringe pumps and flow-path, capillary monolithic column, and optical fiber mediated flow-cell detection as well as controlling modules are installed in a suitcase with a total weight of less than 8 kg. The p-μLC is powered by DC 12V 3A or 18650 lithium battery pack and controlled by a panel computer with a custom-built windows-based chromatography workstation software for data acquisition. When using the home-made polymethacrylate based C-18 monolithic capillary column (530 μm ID×200 mm in length), the mixed alkylbenzenes can be separated and detected in an isocratic elution mode. The separation efficiency is comparable to that obtained with a commercially available HPLC.
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Affiliation(s)
- Qiang Fu
- College of Chemistry and Chemical Engineering, Xiamen University, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Xiamen 361005, China.,Guangzhou Huibiao Testing Technology Center, Guangzhou 510700, China
| | - Limin Yang
- College of Chemistry and Chemical Engineering, Xiamen University, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Xiamen 361005, China
| | - Qiuquan Wang
- College of Chemistry and Chemical Engineering, Xiamen University, the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Xiamen 361005, China
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5
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Advancements in the preparation and application of monolithic silica columns for efficient separation in liquid chromatography. Talanta 2021; 224:121777. [PMID: 33379011 DOI: 10.1016/j.talanta.2020.121777] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 01/23/2023]
Abstract
Fast and efficient separation remains a big challenge in high performance liquid chromatography (HPLC). The need for higher efficiency and resolution in separation is constantly in demand. To achieve that, columns developed are rapidly moving towards having smaller particle sizes and internal diameters (i.d.). However, these parameters will lead to high back-pressure in the system and will burden the pumps of the HPLC instrument. To address this limitation, monolithic columns, especially silica-based monolithic columns have been introduced. These columns are being widely investigated for fast and efficient separation of a wide range of molecules. The present article describes the current methods developed to enhance the column efficiency of particle packed columns and how silica monolithic columns can act as an alternative in overcoming the low permeability of particle packed columns. The fundamental processes behind the fabrication of the monolith including the starting materials and the silica sol-gel process will be discussed. Different monolith derivatization and end-capping processes will be further elaborated and followed by highlights of the performance such monolithic columns in key applications in different fields with various types of matrices.
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6
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Tang T, Guo D, Huang S. Preparation and chromatographic evaluation of the hydrophilic interaction chromatography stationary phase based on nucleosides or nucleotides. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:419-425. [PMID: 33427266 DOI: 10.1039/d0ay02016h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this work, a series of novel hydrophilic interaction chromatography (HILIC) stationary phases were prepared by grafting nucleosides or nucleotides on the surface of silica gel. Firstly, the silica was modified with 3-glycidoxypropyltrimethoxysilane (GPTMS). And then nucleosides or nucleotides were bonded on the surface of GPTMS-modified silica through the epoxy-amine ring-opening reaction to provide four HILIC materials. These obtained stationary phases were successfully characterized by Fourier transform-infrared spectroscopy (FT-IR) and elemental analysis (EA), respectively. Effects of column temperature, water content of the mobile phase, pH and buffer concentration on the retention behavior of these HILIC materials and the corresponding separation mechanism were evaluated using various nucleosides and nucleobases, respectively. In addition, polar and hydrophilic compounds such as amino acids and water-soluble vitamins were successfully separated using the corresponding columns, showing application potential for the separation of bioactive substances.
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Affiliation(s)
- Tingfeng Tang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China.
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7
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Liu M, Liu ZQ, Zhu H, He CH, Wu KJ. Enantioseparation of racemic amlodipine using immobilized ionic liquid by solid-phase extraction. Chirality 2020; 32:1062-1071. [PMID: 32342529 DOI: 10.1002/chir.23231] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/20/2020] [Accepted: 04/01/2020] [Indexed: 12/13/2022]
Abstract
In this paper, a novel l-glutamate based immobilized chiral ionic liquid (SBA-IL (Glu)) was prepared by chemical bonding method and applied as a solid sorbent for chiral separation of amlodipine. The performance of SBA-IL (Glu) was investigated for the absorption of (S)-amlodipine and separation of amlodipine enantiomer. The static experiment showed that equilibrium adsorption was achieved within 80 minutes, and the saturation adsorptions capacity was 12 mg/g. The complex was then packed in a glass chromatographic column for the separation of amlodipine and the enantiomeric excess (%ee) of (S)-amlodipine reached 24.67%. The immobilized ionic liquids exhibit good reusability, and the separation efficiency remains 18.24% after reused five times, which allows potential scale-up for the chiral separation of amlodipine.
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Affiliation(s)
- Min Liu
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.,Institute of Zhejiang University-Quzhou, Quzhou, China
| | - Zhong-Qian Liu
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.,Institute of Zhejiang University-Quzhou, Quzhou, China
| | - Hai Zhu
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.,Institute of Zhejiang University-Quzhou, Quzhou, China
| | - Chao-Hong He
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.,Institute of Zhejiang University-Quzhou, Quzhou, China
| | - Ke-Jun Wu
- School of Chemical and Process Engineering, University of Leeds, Leeds, UK
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8
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Recent advances in preparation and applications of monolithic chiral stationary phases. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115774] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Ren X, Luo Q, Zhou D, Zhang K, Gao D, Fu Q, Liu J, Xia Z, Wang L. Thermoresponsive chiral stationary phase functionalized with the copolymer of β-cyclodextrin and N-isopropylacrylamide for high performance liquid chromatography. J Chromatogr A 2020; 1618:460904. [PMID: 31992472 DOI: 10.1016/j.chroma.2020.460904] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/04/2020] [Accepted: 01/20/2020] [Indexed: 11/17/2022]
Abstract
A novel chiral stationary phase (CSP) was prepared through the reaction of surface-initiated atom transfer radical polymerization (ATRP) by the copolymerization of thermoresponsive N-isopropylacrylamide (NIPAM) and β-cyclodextrin (β-CD) on the silica beads for high performance liquid chromatography (HPLC). X-ray photoelectron spectroscopy (XPS), elemental analysis (EA), Fourier transform infrared spectrometry (FT-IR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) were applied to characterize the surface property of modified silica. Thermoresponsive modulation for the effect on enantioselectivity were investigated with chiral reagents including 1-phenyl-1-propanol, styrene oxide, 2-phenylpropionic acid and commercial chiral drugs comprising ibuprofen and labetalol hydrochloride. The column efficiency was evaluated by chromatographic parameters including retention factor (k), selective factor (α), resolution (Rs), plate number (N) and peak tailing factor (Tf). The results showed that five chiral solutes could be separated on the prepared smart column. And the selectivity of these compounds could be modulated by regulating the column temperature. It was contributed to the thermoresponsive NIPAM assisting β-CD to separate these chiral compounds. These results indicated that the thermoresponsive CSP would be a potential tool for separation of hydrophilic and hydrophobic chiral drugs and this paper provided a novel method for chiral separation in the future.
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Affiliation(s)
- Xiujun Ren
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Qiurong Luo
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Di Zhou
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Kailian Zhang
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Die Gao
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Qifeng Fu
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Jun Liu
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Zhining Xia
- School of Pharmacy, Chongqing University, Chongqing, 401331, China.
| | - Lujun Wang
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China; Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research of Southwest Medical University, Luzhou, Sichuan, 646000, China.
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10
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Ma S, Li Y, Ma C, Wang Y, Ou J, Ye M. Challenges and Advances in the Fabrication of Monolithic Bioseparation Materials and their Applications in Proteomics Research. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902023. [PMID: 31502719 DOI: 10.1002/adma.201902023] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/29/2019] [Indexed: 06/10/2023]
Abstract
High-performance liquid chromatography integrated with tandem mass spectrometry (HPLC-MS/MS) has become a powerful technique for proteomics research. Its performance heavily depends on the separation efficiency of HPLC, which in turn depends on the chromatographic material. As the "heart" of the HPLC system, the chromatographic material is required to achieve excellent column efficiency and fast analysis. Monolithic materials, fabricated as continuous supports with interconnected skeletal structure and flow-through pores, are regarded as an alternative to particle-packed columns. Such materials are featured with easy preparation, fast mass transfer, high porosity, low back pressure, and miniaturization, and are next-generation separation materials for high-throughput proteins and peptides analysis. Herein, the recent progress regarding the fabrication of various monolithic materials is reviewed. Special emphasis is placed on studies of the fabrication of monolithic capillary columns and their applications in separation of biomolecules by capillary liquid chromatography (cLC). The applications of monolithic materials in the digestion, enrichment, and separation of phosphopeptides and glycopeptides from biological samples are also considered. Finally, advances in comprehensive 2D HPLC separations using monolithic columns are also shown.
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Affiliation(s)
- Shujuan Ma
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, China
| | - Ya Li
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, China
| | - Chen Ma
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, China
| | - Yan Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, China
| | - Junjie Ou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingliang Ye
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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11
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Wu D, Pan F, Tan W, Gao L, Tao Y, Kong Y. Recent progress of enantioseparation under scale production (2014–2019). J Sep Sci 2019; 43:337-347. [DOI: 10.1002/jssc.201900682] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 10/11/2019] [Accepted: 10/28/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Datong Wu
- Jiangsu Key Laboratory of Advanced Materials and TechnologySchool of Petrochemical EngineeringChangzhou University Changzhou P. R. China
| | - Fei Pan
- Jiangsu Key Laboratory of Advanced Materials and TechnologySchool of Petrochemical EngineeringChangzhou University Changzhou P. R. China
| | - Wensheng Tan
- Changzhou Key Laboratory of Large Plastic Parts Intelligence ManufacturingChangzhou College of Information Technology Changzhou P. R. China
| | - Li Gao
- Jiangsu Key Laboratory of Advanced Materials and TechnologySchool of Petrochemical EngineeringChangzhou University Changzhou P. R. China
| | - Yongxin Tao
- Jiangsu Key Laboratory of Advanced Materials and TechnologySchool of Petrochemical EngineeringChangzhou University Changzhou P. R. China
| | - Yong Kong
- Jiangsu Key Laboratory of Advanced Materials and TechnologySchool of Petrochemical EngineeringChangzhou University Changzhou P. R. China
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12
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13
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Sýkora D, Řezanka P, Záruba K, Král V. Recent advances in mixed-mode chromatographic stationary phases. J Sep Sci 2018; 42:89-129. [PMID: 30427127 DOI: 10.1002/jssc.201801048] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 01/02/2023]
Abstract
Mixed-mode phases have become very popular in the last decade, and the number of new mixed/multi-mode sorbents is growing fast. Unlike single-mode stationary phases, perfectly suited for the separation of the analytes possessing similar physicochemical properties, for instance reversed-phase chromatography for hydrophobic solutes, mixed-mode sorbents providing multimodal interactions can render better separation selectivity for complex mixtures of solutes differing significantly in their physicochemical characteristics. The most frequent modern mixed-mode stationary phases are di/tri-mode sorbents embracing the following interactions, hydrophobic, electrostatic (coulombic), and hydrophilic. According to their structures, it is possible to distinguish silica-based, polymer-based, hybrid, and monolithic mixed-mode stationary phases. Herewith, newly synthesized mixed-mode sorbents developed within the last two and half years are categorized, discussed, and summarized. The main attention is devoted to the description of the synthetic routes and characterization methods applied for the new stationary phases.
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Affiliation(s)
- David Sýkora
- Faculty of Chemical Engineering, Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| | - Pavel Řezanka
- Faculty of Chemical Engineering, Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| | - Kamil Záruba
- Faculty of Chemical Engineering, Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
| | - Vladimír Král
- Faculty of Chemical Engineering, Department of Analytical Chemistry, University of Chemistry and Technology, Prague, Czech Republic
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14
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Aydoğan C. Chiral separation and determination of amino acid enantiomers in fruit juice by open-tubular nano liquid chromatography. Chirality 2018; 30:1144-1149. [DOI: 10.1002/chir.23006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/10/2018] [Accepted: 07/09/2018] [Indexed: 01/18/2023]
Affiliation(s)
- Cemil Aydoğan
- Department of Food Engineering; Bingöl University; Bingöl Turkey
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15
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Enantiomeric separation of adrenaline, noradrenaline, and isoprenaline by capillary electrophoresis using streptomycin-modified gold nanoparticles. Mikrochim Acta 2018; 185:227. [PMID: 29594555 DOI: 10.1007/s00604-018-2758-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 03/04/2018] [Indexed: 10/17/2022]
Abstract
Enantiomeric separations of the adrenergic compounds adrenaline, noradrenaline, and isoprenaline were studied. Electromigrative separations were performed in uncoated fused silica capillaries using streptomycin-modified gold nanoparticles (ST-AuNPs) as an additive to the background electrolyte. The ST-AuNPs are shown to serve as an effective chiral selector. The modified AuNPs were characterized in terms of size and zeta potential, and by IR and UV-vis spectra. The effects of ST-AuNP concentration, pH value, temperature, and separation voltage on the separations were systematically studied. Under optimized experimental conditions, racemic mixtures of the respective adrenergic drugs were baseline-separated within 7 min with a resolution of up to 7.5. The relative standard deviations of the resolution in inter-day and intra-day studies (n = 5) were generally <5%. Graphical abstract Schematic of the method for enantiomeric separations. (A): At low concentrations of streptavidinylated gold nanoparticles (ST-AuNPs), the better matching enantiomer is preferably "transported" by the ST-AuNPs; (B) ST-AuNP concentration increased to an optimal value; (C): The ST-AuNP concentration is too high; even poorly matching enantiomers will be transported simultaneously.
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16
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Voeten RLC, Ventouri IK, Haselberg R, Somsen GW. Capillary Electrophoresis: Trends and Recent Advances. Anal Chem 2018; 90:1464-1481. [PMID: 29298038 PMCID: PMC5994730 DOI: 10.1021/acs.analchem.8b00015] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Robert L C Voeten
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam , de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.,TI-COAST , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Iro K Ventouri
- TI-COAST , Science Park 904, 1098 XH Amsterdam, The Netherlands.,Analytical Chemistry Group, van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Rob Haselberg
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam , de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Govert W Somsen
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam , de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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17
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Su J, Yang L, Wang Q. Dual polyhedral oligomeric silsesquioxanes polymerization approach to mutually-mediated separation mechanisms of hybrid monolithic stationary and mobile phases towards small molecules. J Chromatogr A 2018; 1533:136-142. [DOI: 10.1016/j.chroma.2017.12.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/27/2017] [Accepted: 12/12/2017] [Indexed: 01/10/2023]
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18
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Xu S, Wang Y, Tang Y, Ji Y. A protein-based mixed selector chiral monolithic stationary phase in capillary electrochromatography. NEW J CHEM 2018. [DOI: 10.1039/c8nj02309c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mixed selector CSP combines the enantioselectivities of both individual proteins, thus expanding their application range practically.
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Affiliation(s)
- Shujuan Xu
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
- Key Laboratory of Drug Quality Control and Pharmacovigilance
| | - Yuying Wang
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
- Key Laboratory of Drug Quality Control and Pharmacovigilance
| | - Yixia Tang
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
- Key Laboratory of Drug Quality Control and Pharmacovigilance
| | - Yibing Ji
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing 210009
- China
- Key Laboratory of Drug Quality Control and Pharmacovigilance
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19
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Wu LL, Liang RP, Chen J, Qiu JD. Separation of chiral compounds using magnetic molecularly imprinted polymer nanoparticles as stationary phase by microchip capillary electrochromatography. Electrophoresis 2017; 39:356-362. [DOI: 10.1002/elps.201700334] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/19/2017] [Accepted: 10/16/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Lu-Lu Wu
- College of Chemistry and Institute for Advanced Study; Nanchang University; Nanchang P. R. China
| | - Ru-Ping Liang
- College of Chemistry and Institute for Advanced Study; Nanchang University; Nanchang P. R. China
| | - Juan Chen
- College of Chemistry and Institute for Advanced Study; Nanchang University; Nanchang P. R. China
| | - Jian-Ding Qiu
- College of Chemistry and Institute for Advanced Study; Nanchang University; Nanchang P. R. China
- Department of Materials and Chemical Engineering; Pingxiang University; Pingxiang P. R. China
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20
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Wessig M, Spitzbarth M, Klaiber A, Drescher M, Polarz S. Negative and Positive Confinement Effects in Chiral Separation Chromatography Monitored with Molecular-Scale Precision by In-Situ Electron Paramagnetic Resonance Techniques. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11968-11976. [PMID: 28990785 DOI: 10.1021/acs.langmuir.7b02713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Separation of compounds using liquid chromatography is a process of enormous technological importance. This is true in particular for chiral substances, when one enantiomer has the desired set of properties and the other one may be harmful. The degree of development in liquid chromatography is extremely high, but still there is a lack in understanding based on experimental data how selectivity works on a molecular level directly at the surfaces of a porous host material. We have prepared amino-acid containing organosilica as such host materials. Watching the rotational dynamics of chiral spin probes using electron paramagnetic resonance spectroscopy allows us to differentiate between surface adsorbed and free guest species. Diastereotopic selectivity factors were determined, and the influence of chiral surface group density, chemical character of the surface groups, pore-size, and temperature was investigated. We found higher selectivity values in macroporous solids with a rather rigid organosilica network and at lower temperature, indicating the significant effect of confinement effects. In mesoporous materials features are opposed with regards to the T-dependent behavior. From EPR imaging techniques and the resulting (macroscopic) diffusion coefficients, we could confirm that the correlations found on the microscopic level transform also to the macroscopic behavior. Thus, our study is of value for the development of future chromatography materials by design.
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Affiliation(s)
- Martin Wessig
- University of Konstanz , Department of Chemistry, D-78457 Konstanz, Germany
| | - Martin Spitzbarth
- University of Konstanz , Department of Chemistry, D-78457 Konstanz, Germany
| | - Alexander Klaiber
- University of Konstanz , Department of Chemistry, D-78457 Konstanz, Germany
| | - Malte Drescher
- University of Konstanz , Department of Chemistry, D-78457 Konstanz, Germany
| | - Sebastian Polarz
- University of Konstanz , Department of Chemistry, D-78457 Konstanz, Germany
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22
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Noguchi H, Liu T, Nozato S, Kuwahara Y, Takafuji M, Nagaoka S, Ihara H. Novel Black Organic Phase for Ultra Selective Retention by Surface Modification of Porous Silica. CHEM LETT 2017. [DOI: 10.1246/cl.170449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroki Noguchi
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Tianhang Liu
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Shoji Nozato
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Yutaka Kuwahara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Makoto Takafuji
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
| | - Shoji Nagaoka
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
- Materials and Regional Resources Laboratory, Kumamoto Industrial Research Institute, 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
| | - Hirotaka Ihara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
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Rathnasekara R, Khadka S, Jonnada M, El Rassi Z. Polar and nonpolar organic polymer-based monolithic columns for capillary electrochromatography and high-performance liquid chromatography. Electrophoresis 2016; 38:60-79. [DOI: 10.1002/elps.201600356] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/04/2016] [Accepted: 09/13/2016] [Indexed: 12/16/2022]
Affiliation(s)
| | | | - Murthy Jonnada
- Department of Chemistry; Oklahoma State University; Stillwater OK USA
| | - Ziad El Rassi
- Department of Chemistry; Oklahoma State University; Stillwater OK USA
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