1
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Qiu D, Liu G, Li F, Kang J. Determination of 5-methyldeoxycytosine and oxidized derivatives by nano-liquid chromatography with zwitterionic monolithic capillary column. J Chromatogr A 2023; 1693:463895. [PMID: 36857983 DOI: 10.1016/j.chroma.2023.463895] [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: 01/12/2023] [Revised: 02/08/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023]
Abstract
DNA methylation is one of the epigenetic modifications at the 5-carbon of cytosine to form 5-methyl-2'-deoxycytidine (5mdC). In mammalian cells, 5mdC can be transferred to 5-hydroxymethyl-2'-deoxycytidine (5hmdC) by ten-eleven translocation (TET), and 5hmdC is further oxidized to 5-formyl-2'-deoxycytidine (5fodC) and 5-carboxyl-2'-deoxycytidine (5cadC). In the present work, we developed a highly sensitive nano liquid chromatographic method for the determination of 5mC and 5hmC with zwitterionic monolithic capillary column. The conditions for the preparation of zwitterionic monolithic capillary column were systematically optimized. The monolithic capillary column displayed high column efficiency for nucleoside dA (190,000 plates/m) and allowed the baseline separation of 10 standard nucleosides in HILIC mode. The detection sensitivity was improved significantly by using the large volume injection combined with sample stacking onto the head of the column when sample was dissolved in high content organic solvent (ACN: H2O = 97:3). The limit of detection for 5mdC and 5hmdC were determined as 4 nM and 3 nM, respectively, and the corresponding limit of quantification were determined as 12 nM and 10 nM, respectively. Further, the zwitterionic monolithic capillary column can be easily utilized in nano-LC and mass spectrometry coupling for qualitative analysis of 5mdC, 5hmdC, 5fodC and 5cadC in real mouse brain sample. The whole genomic DNA methylation levels in mouse brain sample can be easily determined with UV detection.
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Affiliation(s)
- Danye Qiu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
| | - Guizhen Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China; School of Physical Science and Technology, ShanghaiTech University, Haike Road 100, Shanghai 200031, China
| | - Feng Li
- School of Chemical Engineering, Xi'an Key Laboratory of Food Safety Testing and Risk Assessment, Xi'an University, Xi'an 710065, China
| | - Jingwu Kang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China.
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2
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Li J, Qiu D, Li F, Kang J. Preparation of poly(N-vinylpyrrolidone-co-pentaerythritol triacrylate) monolithic column for hydrophilic interaction chromatography. J Sep Sci 2023; 46:e2201033. [PMID: 36774335 DOI: 10.1002/jssc.202201033] [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: 12/18/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 02/13/2023]
Abstract
A method for the preparation of poly(N-vinylpyrrolidone-co-pentaerythritol triacrylate copolymerization)-based monolithic capillary column was reported for the separation of polar small molecular weight compounds with nano-liquid chromatography in hydrophilic interaction chromatography mode. The monolithic columns were prepared by in situ copolymerization of N-vinylpyrrolidone and a cross-linker pentaerythritol triacrylate in a binary porogenic agent consisting of methanol and water. The composition of the polymerization solution was systematically optimized in terms of column permeability, theoretical plate number, asymmetric factor, and retention factor. A typical hydrophilic chromatography retention mechanism was observed with a mobile phase composed of a high content of organic solvent. The preparation method is simple and robust, the precursor N-vinylpyrrolidone is chemically stable, cheap, and easily available. The N-vinylpyrrolidone-based hydrophilic interaction chromatography stationary phase displays satisfactory separation selectivity for a range of polar test analytes, including benzoic acid derivatives, nucleosides, and phenols.
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Affiliation(s)
- Jing Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, P. R. China.,School of Physical Science and Technology, Shanghai Tech University, Shanghai, P. R. China
| | - Danye Qiu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, P. R. China
| | - Feng Li
- School of Chemical Engineering, Xi'an Key Laboratory of Food Safety Testing and Risk Assessment, Xi'an University, Xi'an, P. R. China
| | - Jingwu Kang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, P. R. China.,School of Physical Science and Technology, Shanghai Tech University, Shanghai, P. R. China
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3
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Li J, Liu J, Weng Q. A Hydrophilic Strong Anion-Exchange Hybrid Monolith for Capillary Liquid Chromatography. LCGC EUROPE 2022. [DOI: 10.56530/lcgc.eu.od3570x2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A hydrophilic strong anion-exchange monolithic hybrid column was prepared by in-capillary coating 5-µm bare silica particles with the copolymers of methacryloxyethyltrimethyl ammonium chloride and pentaerythritol triacrylate in the presence of a porogen consisting of water, methanol, and cyclohexanol. The composition of the porogen and the concentration of the monomers were investigated and selected. The resulting column was characterized. The column had an uniform pore structure and could withstand a back pressure up to 3500 psi. Its permeability was comparable to that of packed columns and the swelling-shrinking behaviour negligible. Its hydrophobicity could be suppressed at acetonitrile concentrations above 40% (v/v) and the minimum theoretical plate height was about 10 µm for BrÑ. The column-to-column relative standard deviations (RSDs) were 2.2% and 3.5% (n = 9) and the batch-to-batch RSDs were 2.4% and 5.5% (n = 3) for k and H values, respectively. The column exhibited a remarkable performanceforthe separation of inorganic anions, organic weak acids, phenols, and nucleotides.
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Affiliation(s)
| | - Jun Liu
- Liaoning Normal University, China
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4
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Liu G, Du Y, Fu T, Han Y, Pan L, Kang J. Profiling protein interactions by purification with capillary monolithic affinity column in combination with label-free quantitative proteomics. J Chromatogr A 2022; 1676:463273. [PMID: 35767907 DOI: 10.1016/j.chroma.2022.463273] [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: 01/16/2022] [Revised: 06/13/2022] [Accepted: 06/21/2022] [Indexed: 10/17/2022]
Abstract
An approach for profiling protein-protein interactions by using affinity purification with capillary monolithic immobilized metal affinity chromatography column (cm-IMAC) in combination with label free quantitative proteomics was described in the present work. The cm-IMAC columns were prepared in a single step by copolymerization of the function monomer, namely (S)-2,2'-((1-carboxy-5-(pent‑4-enamido)pentyl)azanediyl)diacetic acid which provide a nitrilotriacetate (NTA) moiety to form chelated complexation with Ni (II) ions, inside the fused silica capillaries. The His6-tagged bait protein can be easily immobilized on the cm-IMAC columns through the formation of chelating complexation with the NTA-Ni (II) functional groups of the matrix. The cm-IMAC columns were used to explore protein-protein interactions (PPIs) on a proteomic scale when combined with label-free proteomics. A known interaction pair of proteins, namely NDP52 (amino acid sequence 10-126) and NAP1 (33-75) as well as Bcl-2 family proteins were used for proof of concept. New interactors of Bcl-XL were identified and validated by co-immunoprecipitation.
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Affiliation(s)
- Guizhen Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China; School of physical science and technology, ShanghaiTech University, Haike Road 100, Shanghai 200120, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yanan Du
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China; School of physical science and technology, ShanghaiTech University, Haike Road 100, Shanghai 200120, China; University of Chinese Academy of Sciences, Beijing, China
| | - Tao Fu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ying Han
- School of life science and technology, ShanghaiTech University, Haike Road 100, Shanghai 200120, China
| | - Lifeng Pan
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jingwu Kang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
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5
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Lei X, Zhang B, Zhang Y, Huang T, Tang F, Wu X. In situ photoinitiated fabrication of phosphorylcholine-functionalized polyhedral oligomeric silsesquioxane hybrid monolithic column for mixed-mode capillary electrochromatography. Analyst 2022; 147:2253-2263. [DOI: 10.1039/d2an00195k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A phosphorylcholine-functionalized POSS hybrid monolithic column was synthesized via UV curing. It exhibits hydrophilic interaction and weak cation exchange chromatography retention mechanism for the separation of typical polar and charged compounds.
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Affiliation(s)
- Xiaoyun Lei
- Key Laboratory for Analytical Science of Food Safety and Biology; College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Bingyu Zhang
- Key Laboratory for Analytical Science of Food Safety and Biology; College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Yi Zhang
- Key Laboratory for Analytical Science of Food Safety and Biology; College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Ting Huang
- Key Laboratory for Analytical Science of Food Safety and Biology; College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Fengxiang Tang
- Key Laboratory for Analytical Science of Food Safety and Biology; College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Xiaoping Wu
- Key Laboratory for Analytical Science of Food Safety and Biology; College of Chemistry, Fuzhou University, Fuzhou 350116, China
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6
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Seetasang S, Xu Y. Recent progress and perspectives in applications of 2-methacryloyloxyethyl phosphorylcholine polymers in biodevices at small scales. J Mater Chem B 2022; 10:2323-2337. [DOI: 10.1039/d1tb02675e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bioinspired materials have attracted attention in a wide range of fields. Among these materials, a polymer family containing 2-methacryloyloxyethyl phosphorylcholine (MPC), which has a zwitterionic phosphorylcholine headgroup inspired by the...
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7
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Korzhikova-Vlakh E, Antipchik M, Tennikova T. Macroporous Polymer Monoliths in Thin Layer Format. Polymers (Basel) 2021; 13:1059. [PMID: 33801786 PMCID: PMC8037505 DOI: 10.3390/polym13071059] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 12/11/2022] Open
Abstract
Nowadays, macroporous polymer monoliths represent widely used stationary phases for a number of dynamic interphase mass exchange processes such as high-performance liquid chromatography, gas chromatography, electrochromatography, solid-phase extraction, and flow-through solid-state biocatalysis. This review represents the first summary in the field of current achievements on the preparation of macroporous polymer monolithic layers, as well as their application as solid phases for thin-layer chromatography and different kinds of microarray.
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Affiliation(s)
- Evgenia Korzhikova-Vlakh
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia;
| | - Mariia Antipchik
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia;
| | - Tatiana Tennikova
- Institute of Chemistry, Saint-Petersburg State University, Unversitetskiy pr. 26, Petergof, 198584 St. Petersburg, Russia;
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8
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Li F, Qiu D, He J, Kang J. Preparation of Novel Zwitterionic Monolith for Capillary Electrochromatography and Nano LC–MS Applications. Chromatographia 2019. [DOI: 10.1007/s10337-019-03823-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Memon N, Qureshi T, Bhanger MI, Malik MI. Recent Trends in Fast Liquid Chromatography for Pharmaceutical Analysis. CURR ANAL CHEM 2019. [DOI: 10.2174/1573411014666180912125155] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Liquid chromatography is the workhorse of analytical laboratories of pharmaceutical
companies for analysis of bulk drug materials, intermediates, drug products, impurities and
degradation products. This efficient technique is impeded by its long and tedious analysis procedures.
Continuous efforts of scientists to reduce the analysis time resulted in the development of three different
approaches namely, HTLC, chromatography using monolithic columns and UHPLC.
Methods:
Modern column technology and advances in chromatographic stationary phase including
silica-based monolithic columns and reduction in particle and column size (UHPLC) have not only
revolutionized the separation power of chromatographic analysis but also have remarkably reduced the
analysis time. Automated ultra high-performance chromatographic systems equipped with state-ofthe-
art software and detection systems have now spawned a new field of analysis, termed as Fast Liquid
Chromatography (FLC). The chromatographic approaches that can be included in FLC are hightemperature
liquid chromatography, chromatography using monolithic column, and ultrahigh performance
liquid chromatography.
Results:
This review summarizes the progress of FLC in pharmaceutical analysis during the period
from year 2008 to 2017 focusing on detecting pharmaceutical drugs in various matrices, characterizing
active compounds of natural products, and drug metabolites. High temperature, change in the mobile
phase, use of monolithic columns, new non-porous, semi-porous and fully porous reduced particle size
of/less than 3μm packed columns technology with high-pressure pumps have been extensively studied
and successively applied to real samples. These factors revolutionized the fast high-performance separations.
Conclusion:
Taking into account the recent development in fast liquid chromatography approaches,
future trends can be clearly predicated. UHPLC must be the most popular approach followed by the
use of monolithic columns. Use of high temperatures during analysis is not a feasible approach especially
for pharmaceutical analysis due to thermosensitive nature of analytes.
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Affiliation(s)
- Najma Memon
- National Centre of Excellence in Analytical Chemistry, Univeristy of Sindh, Jamshoro, Sindh, Pakistan
| | - Tahira Qureshi
- National Centre of Excellence in Analytical Chemistry, Univeristy of Sindh, Jamshoro, Sindh, Pakistan
| | - Muhammad Iqbal Bhanger
- H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi-75270, Pakistan
| | - Muhammad Imran Malik
- H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi-75270, Pakistan
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10
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Mao Z, Chen Z. Advances in capillary electro-chromatography. J Pharm Anal 2019; 9:227-237. [PMID: 31452960 PMCID: PMC6702421 DOI: 10.1016/j.jpha.2019.05.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/01/2019] [Accepted: 05/07/2019] [Indexed: 11/24/2022] Open
Abstract
Capillary electrochromatography (CEC) is a micro-scale separation technique which is a hybrid between capillary electrophoresis (CE) and liquid chromatography (LC). CEC can be performed in packed, monolithic and open-tubular columns. In recent three years (from 2016 to 2018), enormous attention for CEC has been the development of novel stationary phases. This review mainly covers the development of novel stationary phases for open-tubular and monolithic columns. In particular, some biomaterials attracted increasing interest. There are no significant breakthroughs in technology and principles in CEC. The typical CEC applications, especially chiral separations are described.
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Affiliation(s)
- Zhenkun Mao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China
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11
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Zhang M, Gong L, Liu G, Kang J. Preparation of a monolithic column with a mixed-mode stationary phase of reversed-phase/hydrophilic interaction for capillary liquid chromatography. J Sep Sci 2019; 42:662-669. [DOI: 10.1002/jssc.201800826] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/02/2018] [Accepted: 11/02/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Meng Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Shanghai P. R. China
- School of physical science and technology; ShanghaiTech University; Shanghai P. R. China
| | - Li Gong
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Shanghai P. R. China
| | - Guizhen Liu
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Shanghai P. R. China
- School of physical science and technology; ShanghaiTech University; Shanghai P. R. China
| | - Jingwu Kang
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Shanghai P. R. China
- School of physical science and technology; ShanghaiTech University; Shanghai P. R. China
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12
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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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13
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Monolithic column with polymeric deep eutectic solvent as stationary phase for capillary electrochromatography. J Chromatogr A 2018; 1577:66-71. [DOI: 10.1016/j.chroma.2018.09.046] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 09/18/2018] [Accepted: 09/23/2018] [Indexed: 12/17/2022]
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14
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Mao Z, Qin X, Chen Z. Monolithic column functionalized with quinine derivative for anion‐exchange capillary electrochromatography. Electrophoresis 2018; 39:3006-3012. [DOI: 10.1002/elps.201800253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Zhenkun Mao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of EducationWuhan University School of Pharmaceutical Sciences Wuhan P. R. China
| | - Xiaoning Qin
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of EducationWuhan University School of Pharmaceutical Sciences Wuhan P. R. China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of EducationWuhan University School of Pharmaceutical Sciences Wuhan P. R. China
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15
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Critical review of reports on impurity and degradation product profiling in the last decade. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.09.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Liu Y, Wang W, Jia M, Liu R, Liu Q, Xiao H, Li J, Xue Y, Wang Y, Yan C. Recent advances in microscale separation. Electrophoresis 2017; 39:8-33. [DOI: 10.1002/elps.201700271] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Yuanyuan Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Weiwei Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Mengqi Jia
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Rangdong Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Qing Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Han Xiao
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Jing Li
- Unimicro (shanghai) Technologies Co., Ltd.; Shanghai P. R. China
| | - Yun Xue
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Yan Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Chao Yan
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
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17
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Murauer A, Bakry R, Schottenberger H, Huck C, Ganzera M. An innovative monolithic zwitterionic stationary phase for the separation of phenolic acids in coffee bean extracts by capillary electrochromatography. Anal Chim Acta 2017; 963:136-142. [PMID: 28335967 PMCID: PMC5388181 DOI: 10.1016/j.aca.2017.01.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/11/2017] [Accepted: 01/24/2017] [Indexed: 12/30/2022]
Abstract
A methacrylate based monolith, containing the innovative zwitterionic monomer (3-allyl-1-imidazol)propane sulfonate, was prepared in 100 μm I.D. silica capillaries by UV initiated photo-polymerization. Composition of the porogen, i.e. a mixture of 1-propanol, 1,4 butanediol and water, was of great importance to obtain a homogeneous monolith with satisfactory permeability and good electrochromatographic performance. Morphology of the stationary phase was studied in Scanning Electron Microscopy and IR experiments, which revealed a good attachment to the capillary wall, flowthrough-pores in the range of 0.5-2 μm, and a continuous monolithic structure. The developed material was well suited for the analysis of six common phenolic acids (salicylic, cinnamic, syringic, rosmarinic, caffeic and chlorogenic acid) by CEC. Their separation was possible in less than 8 min with a mobile phase comprising a 12 mM aqueous ammonium acetate solution with pH 8.5 and acetonitrile, at an applied voltage of - 20 kV. The developed method was validated (R2 ≥ 0.995; LOD ≤ 3.9 μg mL-1, except for salicylic acid; recovery rates from 94 to 104%) and successfully used for the determination of phenolic acids in Coffea arabica samples. All of them contained cinnamic, syringic and caffeic acid, however only in unroasted coffee beans chlorogenic acid (0.06%) was found. The quantitative results were in good agreement to reported literature data.
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Affiliation(s)
- Adele Murauer
- Institute of Pharmacy, Pharmacognosy, University of Innsbruck, Innsbruck, Austria
| | - Rania Bakry
- Institute for Analytical Chemistry and Radiochemistry, University of Innsbruck, Innsbruck, Austria
| | - Herwig Schottenberger
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Austria
| | - Christian Huck
- Institute for Analytical Chemistry and Radiochemistry, University of Innsbruck, Innsbruck, Austria
| | - Markus Ganzera
- Institute of Pharmacy, Pharmacognosy, University of Innsbruck, Innsbruck, Austria.
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18
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Preparation of a Sulfoalkylbetaine-Based Zwitterionic Monolith with Enhanced Hydrophilicity for Capillary Electrochromatography Separation Applications. Chromatographia 2017. [DOI: 10.1007/s10337-017-3303-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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19
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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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Khadka S, El Rassi Z. Postpolymerization modification of a hydroxy monolith precursor. Part I. Epoxy alkane and octadecyl isocyanate modified poly (hydroxyethyl methacrylate-co-pentaerythritol triacrylate) monolithic capillary columns for reversed-phase capillary electrochroma. Electrophoresis 2016; 37:3160-3171. [DOI: 10.1002/elps.201600321] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 08/31/2016] [Accepted: 09/02/2016] [Indexed: 11/11/2022]
Affiliation(s)
| | - Ziad El Rassi
- Department of Chemistry; Oklahoma State University; Stillwater OK USA
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