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Al-Harbi SA, Almulaiky YQ. Copper-based metal-organic frameworks (BDC-Cu MOFs) as supporters for α-amylase: Stability, reusability, and antioxidant potential. Heliyon 2024; 10:e28396. [PMID: 38560692 PMCID: PMC10979214 DOI: 10.1016/j.heliyon.2024.e28396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/04/2024] Open
Abstract
Copper-based metal-organic frameworks (BDC-Cu MOFs) were synthesized via a casting approach using 1,4-benzene dicarboxylic (BDC) as organic ligand and their properties characterized. The obtained materials were then utilized to immobilize the α-amylase enzyme. The chemical composition and functional components of the synthesized support (BDC-Cu MOFs) were investigated with Fourier transform infrared spectroscopy (FTIR), the surface morphology was determined with scanning electron microscopy (SEM), and the elemental composition was established with energy dispersive X-ray (EDX) analyses. X-ray diffraction (XRD) was employed to analyze the crystallinity of the synthesized DBC-Cu MOFs. The zeta potentials of DBC-Cu MOFs and DBC-Cu MOFs@α-amylase were determined. The immobilized α-amylase demonstrated improved catalytic activity and reusability compared to the free form. Covalent attachment of the α-amylase to BDC-Cu provided an immobilization yield (IY%) of 81% and an activity yield (AY%) of 89%. The immobilized α-amylase showed high catalytic activity and 81% retention even after ten cycles. Storage at 4 °C for eight weeks resulted in a 78% activity retention rate for DBC-Cu MOFs@α-amylase and 49% retention for the free α-amylase. The optimum activity occurred at 60 °C for the immobilized form, whereas the free form showed optimal activity at 50 °C. The free and immobilized α-amylase demonstrated peak catalytic activities at pH 6.0. The maximum reaction velocities (Vmax) values were 0.61 U/mg of protein for free α-amylase and 0.37 U/mg of protein for BDC-Cu MOFs@α-amylase, while the Michaelis‒Menten affinity constants (Km) value was lower for the immobilized form (5.46 mM) than for the free form (11.67 mM). Treatments of maize flour and finger millet samples with free and immobilized α-amylase resulted in increased total phenolic contents. The enhanced antioxidant activities of the treated samples were demonstrated with decreased IC50 values in ABTS and DPPH assays. Overall, immobilization of α-amylase on BDC-Cu MOFs provided improved stability and catalytic activity and enhanced the antioxidant potentials of maize flour and finger millet.
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Affiliation(s)
- Sami A Al-Harbi
- Department of Chemistry, University College in Al-Jamoum, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Yaaser Q Almulaiky
- Department of Chemistry, Collage of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Applied Science, Taiz University, Taiz, Yemen
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2
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Li Z, Liao Z, Ding X, Hu J, Chen Z. Facile room-temperature synthesis of a spherical mesoporous covalent organic framework for capillary electrochromatography. J Chromatogr A 2024; 1716:464626. [PMID: 38232637 DOI: 10.1016/j.chroma.2023.464626] [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: 11/15/2023] [Revised: 12/10/2023] [Accepted: 12/29/2023] [Indexed: 01/19/2024]
Abstract
Herein, a spherical covalent organic framework COF TAPB-DMTP was facilely synthesized from 2,5-dimethoxyterephthalaldehyde (DMTP) and 1,3,5-tri-(4-aminophenyl)benzene (TAPB) as monomers. COF TAPB-DMTP with regular mesoporous and excellent mass transfer ability was first introduced into the capillary and immobilized on the inner wall of the capillary through a simple in situ growth method. Through various characterization results, COF TAPB-DMTP was successfully prepared and modified onto the capillary inner wall. The separation performance and potential of COF TAPB-DMTP modified capillary column was explored. The new developed COF modified column achieved a highly efficiency and selective separation between analytes with different properties, including halogeno benzenes, alkylbenzenes, phenols and sulfonamides. Satisfactory stability and reproducibility were observed on COF TAPB-DMTP modified columns. The intraday, interday and three batch columns relative standard deviations were all less than 1.85 % for the retention time. The separation performance of prepared column has no significant change after 90 continuous runs. Additionally, the COF TAPB-DMTP modified capillary column was successfully used for separation and detection of triazole antifungal drugs in human plasma, and the recoveries of three antifungal drugs (fluconazole, isavuconazole and posaconazole) in spiked samples were in the range of 98.6-100.8 %, 92.4-102.1 % and 99.9-107.5 %, respectively. This self-made column showed excellent application potential in chromatography separation science.
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Affiliation(s)
- Zhentao Li
- Department of Pharmacy, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China; School of Pharmaceutical Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhengzheng Liao
- Department of Pharmacy, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China
| | - Xiaoru Ding
- Department of Pharmacy, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China
| | - Jinfang Hu
- Department of Pharmacy, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi 330006, People's Republic of China.
| | - Zilin Chen
- School of Pharmaceutical Sciences, Wuhan University, Wuhan 430072, People's Republic of China.
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3
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Schena T, von Mühlen C. Chromatographic speed classification for liquid chromatography using average theoretical peak time (ATPT). Anal Chim Acta 2024; 1287:342092. [PMID: 38182344 DOI: 10.1016/j.aca.2023.342092] [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: 09/04/2023] [Revised: 11/19/2023] [Accepted: 11/29/2023] [Indexed: 01/07/2024]
Abstract
BACKGROUND The development of analytical techniques in the field of liquid chromatography has brought new frontiers in performance and analytical speed for the technique. The proper evaluation of the analytical boundaries achieved with those developments was not addressed in the literature, since different liquid chromatography (LC) techniques have not yet received any classification regarding their chromatographic speed. Defining chromatographic analysis speed based simply on analysis time is an outdated concept since it is sample and analyte-dependent. In this context, the application of the Average Theoretical Peak Time concept (ATPT) is proposed as a unified metric for chromatographic speed classification. RESULTS This metric was evaluated using PCA analysis in a group of more than 50 publications, which generated the classification of LC methods in normal, high, hyper, and ultra-high-speed separations using ATPT. Normal speed (ATPT values greater than 18000 ms/peak) was found in HPLC, nano-LC, SFC, and CEC methods. Therefore, high-speed methods (ATPT values between 4000 and 18000 ms/peak) were found in UHPLC techniques, while LC × LC methods presented higher ATPT values between 1000 and 4000 ms/peak being classified as hyper-speed separations. ATPT can also be used as an optimization parameter, since older methods show higher ATPT values, while recent published papers show lower values of this metric. This behavior is justified due to the improvement of the LC methods over the years. SIGNIFICANCE This work fulfills the gap in chromatographic definitions and metrics, regarding analytical speed in one-dimensional and multidimensional liquid chromatographic techniques and shows that ATPT metrics is a robust parameter that can be used to classify the separation speed as well as a metric to evaluate the LC Method optimization. It also corrects the historical application of separation time as a metric for chromatographic speed.
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Affiliation(s)
- Tiago Schena
- Faculty of Technology, Universidade Estadual do Rio de Janeiro (UERJ), Presidente Dutra highway, km 298, Resende, (RJ), 27537-000, Brazil; LECO Instruments, Av. Das Nações Unidas, 12399 - Cj121B, São Paulo, (SP), 04578-000, Brazil.
| | - Carin von Mühlen
- Faculty of Technology, Universidade Estadual do Rio de Janeiro (UERJ), Presidente Dutra highway, km 298, Resende, (RJ), 27537-000, Brazil.
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Ahmed MA, Ghiasvand A, Quirino JP. Dynamic in situ growth of bonded-phase silica nanospheres on silica capillary inner walls for open-tubular liquid chromatography. Anal Bioanal Chem 2023; 415:4923-4934. [PMID: 37351669 PMCID: PMC10386930 DOI: 10.1007/s00216-023-04798-1] [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: 03/16/2023] [Revised: 06/07/2023] [Accepted: 06/09/2023] [Indexed: 06/24/2023]
Abstract
Silica nanospheres (SNS) were grown on the inner walls of silica capillaries through a dynamic in situ nucleation process to prepare a highly porous and large accessible surface area substrate. The SNS were then functionalized with octadecyl (C18), 3-aminopropyltriethoxysilane (APTES), beta-cyclodextrin (β-CD), and amino groups to develop robust and efficient chromatographic stationary phases. The modified silica capillaries were exploited for open-tubular liquid chromatography (OT-LC) and open-tubular capillary electrochromatography (OT-CEC) applications. The prepared stationary phases were compared to conventional capillaries in terms of separation performance. The synthesis process was optimized, and the bonded-phase stationary phases were characterized by the electron microscopy technique. The effects of different solvents, additives, and functional groups on the geometry and chromatographic resolving power of the SNS were envisaged. The capillaries modified with octadecyl groups were evaluated for the separation of non-steroidal anti-inflammatory drugs, phenones, alkenylbenzenes, and enantiomers of chlorophenoxy herbicides. As an application instance, an SNS-C18-coated capillary was utilized for the separation of alkenylbenzenes from clove extract and protein digest medium, through OT-LC and OT-CEC techniques, respectively. The β-CD functionalized capillary was applied for the OT-CEC separation of a dichlorprop racemic mixture.
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Affiliation(s)
- Mohamed Adel Ahmed
- Australian Centre for Research On Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, TAS, 7001, Australia
| | - Alireza Ghiasvand
- Australian Centre for Research On Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, TAS, 7001, Australia.
- Department of Analytical Chemistry, Lorestan University, Khoramabad, Iran.
| | - Joselito P Quirino
- Australian Centre for Research On Separation Science (ACROSS), School of Natural Sciences, University of Tasmania, Hobart, TAS, 7001, Australia.
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In situ growth of imine-based covalent organic framework as stationary phase for high-efficiency electrochromatographic separation. J Chromatogr A 2023; 1694:463905. [PMID: 36881971 DOI: 10.1016/j.chroma.2023.463905] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/24/2023] [Accepted: 02/26/2023] [Indexed: 03/04/2023]
Abstract
Design of the smart stationary phases, which can improve the separation efficiency is an essential work in the capillary electrochromatography (CEC). Owing to good excellent properties, covalent organic frameworks (COFs) have showed promising potential in the area of separation science. Here, a micro- and mesoporous COF TAPB-BTCA with adequate available interaction sites and outstanding mass transfer performance was first exploited as a stationary phase for high-efficiency in capillary electrochromatography. Through in situ growth approach, the COF TAPB-BTCA coated capillary column was facilely prepared at room temperature. The separation ability of the COF TAPB-BTCA coated capillary column was studied. The fabricated column showed high efficiency for the separation of six types of small molecular compounds, including alkylbenzenes, chlorobenzenes, phenols, parabens, vanillin and related phenolic compounds, and non-steroidal anti-inflammatory drugs (NSAIDs). The maximum theoretical plates reached up to 293,363 N/m for phloroglucinol, showing significantly improved column efficiency in comparison to previous reported COFs-based columns. In addition, the mass loadability for methylbenzene was achieved to 1.44 mg/mL. Also, excellent reproducibility and stability were obtained on the COF TAPB-BTCA coated columns. The relative standard deviations of intra-day (n = 3), inter-day (n = 3) and three batch tubes were all less than 2%, and no obvious change was presented in separation performance after the column was used 120 runs. This COF TAPB-BTCA-based stationary phase would be a promising candidate for high-efficiency chromatographic separation.
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Miao P, Gan J, Zhang J, Ma M, Li X, Du Y, Feng Z, Zhang L. Carboxymethyl-β-cyclodextrin and histidine-zeolitic imidazolate framework-8 used for enantioseparation of three basic drugs in open-tubular capillary electrochromatography. Chirality 2022; 34:1209-1218. [PMID: 35678370 DOI: 10.1002/chir.23480] [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: 04/09/2022] [Revised: 05/18/2022] [Accepted: 05/25/2022] [Indexed: 11/09/2022]
Abstract
Metal organic frameworks (MOFs) have drawn broad attention as a novel stationary phase due to their highly porous structure, modifiable pores, large specific surface areas, and satisfactory stability. In this paper, histidine-zeolitic imidazolate framework-8 (His-ZIF-8) synthesized at room temperature was physically coated to the internal surface of the capillary column and the carboxymethyl-β-cyclodextrin (CM-β-CD) as the chiral selector was chemically bonded to the His-ZIF-8@capillary column. The prepared CM-β-CD@His-ZIF-8@capillary column was used for the enantioseparation of amlodipine, propranolol, and atenolol in capillary electrochromatography. In contrast to the CM-β-CD@capillary column without His-ZIF-8, the CM-β-CD@His-ZIF-8@capillary column reveals significantly improved enantiodiscrimination performance for amlodipine (Rs : 0 → 2.29), propranolol (Rs : 0 → 1.69), and atenolol (Rs : 0 → 0.79). His-ZIF-8 concentration, buffer pH, buffer concentration, and the proportion of organic modifier were evaluated in detail with enantiomerically separating chiral molecules. The repeatability of intraday, day-to-day, and column-to-column have been discussed; the result was preferable, and the relative standard deviation (RSD) of separation parameters was <6.7%.
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Affiliation(s)
- Pandeng Miao
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Jie Gan
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Jian Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Mingxuan Ma
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Xiaoqi Li
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yingxiang Du
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Zijie Feng
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Liu Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
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7
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Li Q, Li Z, Fu Y, Hu C, Chen Z. Synthesis of crystalline covalent organic framework as stationary phase for capillary electrochromatography. J Chromatogr A 2022; 1673:463070. [DOI: 10.1016/j.chroma.2022.463070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/05/2022] [Accepted: 04/14/2022] [Indexed: 01/04/2023]
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8
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Zhong Z, Zhu M, Chu Z, Ren X, Tu B, Zhang W, Zhang L. Preparation and evaluation of ultra-long open-tubular capillary columns modified with Zeolitic Imidazolate Framework-8 incorporated polymeric porous layer for liquid chromatography. J Chromatogr A 2022; 1668:462880. [DOI: 10.1016/j.chroma.2022.462880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/24/2022] [Accepted: 02/03/2022] [Indexed: 10/19/2022]
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9
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Wang T, Yang L, Cheng Y, Zhang Y, Ye J, Chu Q, Cheng G. Evaluation of homochiral zeolitic imidazolate framework-8 supported open-tubular column by miniaturized capillary electrochromatography with amperometric detection. Mikrochim Acta 2021; 188:375. [PMID: 34635945 DOI: 10.1007/s00604-021-05030-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/15/2021] [Indexed: 12/21/2022]
Abstract
A novel kind of chiral open-tubular (OT) column was established with homochiral zeolitic imidazolate framework-8 nanomaterials using L-histidine as the chiral carbon center (L-His-ZIF-8). The morphologies of L-His-ZIF-8 nanoparticles and chiral OT column were characterized by scanning electron microscopy. The effects of L-His-ZIF-8 concentrations, pH values, and concentrations of the running buffer on the resolution of the selected chiral compounds were investigated based on miniaturized capillary electrochromatography with amperometric detection system (mini-CEC-AD), respectively. The separation performances of the prepared L-His-ZIF-8@OT chiral columns were explored under the optimal conditions, and the RSDs of run-to-run, day-to-day, and column-to-column reproducibility were less than 6.7% using salbutamol raceme as the model enantiomers. The prepared chiral OT columns have been successfully applied to the enantioseparation of one pair of amino acid enantiomers, two pairs of racemic drugs, and three pairs of neurotransmitter enantiomers. Under the optimum conditions, the prepared OT columns were applied to real-world sample analysis of salbutamol aerosol. The limits of detection of salbutamol raceme were 0.90 μg·mL-1 (S/N = 3), and the recovery was 80.4-82.7%. The assay results indicated that this kind of chiral OT column modified with homochiral L-His-ZIF-8 possesses good reproducibility and stability. This developed mini-OT-CEC-AD system has some attractive characteristics of sensitivity and low cost, providing a potential way for the separation of chiral compounds.
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Affiliation(s)
- Tingting Wang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Li Yang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Yuhuan Cheng
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Yulian Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Jiannong Ye
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Qingcui Chu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.
| | - Guifang Cheng
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
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Li Z, Guo Z, Zhang T, Li Q, Chen J, Ji W, Liu C, Wei Y. Fabrication of in situ ZIF-67 grown on alginate hydrogels and its application for enhancing Cu (II) adsorption from aqueous solutions. Colloids Surf B Biointerfaces 2021; 207:112036. [PMID: 34416440 DOI: 10.1016/j.colsurfb.2021.112036] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 08/02/2021] [Accepted: 08/12/2021] [Indexed: 10/20/2022]
Abstract
Synthesizing high uniform metal-organic frameworks grown on natural biomass such as sodium alginate (ALG), which can efficiently remove metal ions from aqueous solution, is a challenging project. A simple and eco-friendly method of preparing ALG@ZIF-67 hydrogels by in situ synthesis of ZIF-67 onto ALG hydrogels was established. Combining the virtues of ALG with abundant hydroxyl and carboxyl groups and ZIF-67 with excellent porous structure, the obtained ALG@ZIF-67 hydrogels have excellent adsorption for Cu2+ (153.63 mg/g), which was much higher than that of pure ALG hydrogels (111.79 mg/g). The methodology showed that the adsorption process was in accord with the Langmuir isotherm adsorption model (R2 = 0.9972) and pseudo-second-order kinetic model (R2 = 0.9822). The thermodynamic experiments demonstrated that Cu (II) was absorbed by hydrogel with an endothermic and spontaneous process. The competitive adsorption experiment results of ALG@ZIF-67 hydrogel indicated that the absorption capacity of Cu (II) was higher than that of Cd (II), Ni (II), Zn (II) and Mn (II). Moreover, the ALG@ZIF-67 hydrogels still had excellent reusability after five adsorption-desorption cycles. The results indicated that the ALG@ZIF-67 hydrogels had the advantages of low cost, easy preparation, and environment friendly.
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Affiliation(s)
- Zhiyue Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 3rd North East Road, Chaoyang District, Beijing 100029, China
| | - Zhiwei Guo
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 3rd North East Road, Chaoyang District, Beijing 100029, China
| | - Taoyi Zhang
- Sinopec Beijing Research Institute of Chemical Industry, 14 North Third Ring Road East, Chaoyang District, Beijing 100014, China
| | - Quan Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 3rd North East Road, Chaoyang District, Beijing 100029, China
| | - Jing Chen
- Sinopec Beijing Research Institute of Chemical Industry, 14 North Third Ring Road East, Chaoyang District, Beijing 100014, China
| | - Wenxi Ji
- Sinopec Beijing Research Institute of Chemical Industry, 14 North Third Ring Road East, Chaoyang District, Beijing 100014, China
| | - Cong Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 3rd North East Road, Chaoyang District, Beijing 100029, China
| | - Yun Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 3rd North East Road, Chaoyang District, Beijing 100029, China.
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11
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Synthesis of metal-organic framework-5@chitosan material for the analysis of microcystins and nodularin based on ultra-performance liquid chromatography-tandem mass spectrometry. J Chromatogr A 2020; 1623:461198. [PMID: 32505287 DOI: 10.1016/j.chroma.2020.461198] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 04/29/2020] [Accepted: 05/01/2020] [Indexed: 12/31/2022]
Abstract
Microcystins (MCs) and nodularin (NOD) are tumor promoters produced by cyanobacteria and present in surface water. In this work, a novel mesoporous metal-organic framework-5@chitosan (MOF-5@CS) material was synthesized and applied for the enrichment of MCs and NOD in water and fish samples. The mesoporous MOF-5@CS material was firstly synthesized via a one-step hydrothermal method, and the chitosan was combined with MOF-5 via chemical bonding assembly. As a new adsorbent, the as-synthesized material was found having a large specific surface area and good thermal stability. Under the optimized conditions, MCs and NOD were enriched by the MOF-5@CS material and detected by ultra-performance liquid chromatography-tandem mass spectrometry. The limit of detection of the new method for MCs and NOD were in the range of 0.0018-0.077 ng/mL. The value of relative standard deviation for repeatability were 2.69-6.30%, and the recovery of the analytes ranged from 84.36% to 118.51%. Compared with other reported method for MCs and NOD detection in complex matrices, better adsorption performance for MCs and NOD were obtained by our new method, and the sensitivity of MCs-RR and NOD were improved nearly 20 times and 30 times, respectively.
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12
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Wang T, Wang Y, Zhang Y, Cheng Y, Ye J, Chu Q, Cheng G. Rapid preparation and evaluation of chiral open-tubular columns supported with bovine serum album and zeolite imidazolate framework-8 for mini-capillary electrochromatography. J Chromatogr A 2020; 1625:461284. [PMID: 32709334 DOI: 10.1016/j.chroma.2020.461284] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/24/2020] [Accepted: 05/27/2020] [Indexed: 11/28/2022]
Abstract
In this work, a class of novel and eco-friendly open-tubular (OT) chiral column was presented for the first time by one step preparation with zeolite imidazolate framework-8 (ZIF-8) and bovine serum album (BSA) based on electrostatic adsorption and adsorption affinity. This stationary phase materials combined the features of large surface areas and adsorption affinity of ZIF-8, and also the multiple chiral binding sites of BSA, which contributes to the π-interaction and hydrophobic interaction with the analytes. The separation performance of BSA@ZIF-8-OT chiral columns was evaluated with a miniaturized capillary electrochromatography and amperometric detection (mini-CEC-AD) system; in particular, nine groups of model molecules, including homologues, structural isomers, and chiral compounds, were baseline separated under the certain optimum conditions. The RSDs of run-to-run, day-to-day, column-to-column, and batch-to-batch reproducibility were less than 13.8 %. Furthermore, the prepared OT columns were successfully applied to fast analysis of ephedrine isomers in Chinese herb ephedra, and the LODs achieved 1.5-2.0 ng mL-1 (S/N=3) by an electrophoretic stacking technique of moving chemical reaction boundary. This mini-CEC-AD system with BSA@ZIF-8-OT chiral columns provides a promising potential in pharmaceutical analysis due to its fast, sensitive, enantioselective, and low-cost characteristics.
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Affiliation(s)
- Tingting Wang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Ying Wang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yulian Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yuhuan Cheng
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Jiannong Ye
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Qingcui Chu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China.
| | - Guifang Cheng
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
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Zhao L, Lv W, Niu X, Pan C, Chen H, Chen X. An azine-linked covalent organic framework as stationary phase for separation of environmental endocrine disruptors by open-tubular capillary electrochromatography. J Chromatogr A 2020; 1615:460722. [DOI: 10.1016/j.chroma.2019.460722] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/06/2019] [Accepted: 11/16/2019] [Indexed: 01/02/2023]
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14
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Kartsova LA, Kravchenko AV, Kolobova EA. Covalent Coatings of Quartz Capillaries for the Electrophoretic Determination of Biologically Active Analytes. JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1134/s1061934819080100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Ahmed MA, Felisilda BMB, Quirino JP. Recent advancements in open-tubular liquid chromatography and capillary electrochromatography during 2014-2018. Anal Chim Acta 2019; 1088:20-34. [PMID: 31623713 DOI: 10.1016/j.aca.2019.08.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/28/2019] [Accepted: 08/07/2019] [Indexed: 12/20/2022]
Abstract
This review critically discusses the developments on open-tubular liquid chromatography (OT-LC) and open-tubular capillary electrochromatography (OT-CEC) during 2014-2018. An appropriate Scopus search revealed 5 reviews, 4 theoretical papers on open-tubular format chromatography, 29 OT-LC articles, 68 OT-CEC articles and 4 OT-LC/OT-CEC articles, indicating a sustained interest in these areas. The open-tubular format typically uses a capillary column with inner walls that are coated with an ample layer or coating of solid stationary phase material. The ratio between the capillary internal diameter and coating thickness (CID/CT) is ideally ≤ 100 for appropriate chromatographic retention. We, therefore, approximated the CID/CT ratios and found that 22 OT-LC papers have CID/CT ratios ≤100. The other 7 OT-LC papers have CID/CT ratio >100 but have clearly demonstrated chromatographic retention. These 29 papers utilised reversed phase or ion exchange mechanisms using known or innovative solid stationary phase materials (e.g. metal organic frameworks), stationary pseudophases from ionic surfactants or porous supports. On the other hand, we found that 68 OT-CEC papers, 7 OT-LC papers and 4 OT-LC & OT-CEC papers have CID/CT ratios >100. Notably, 44 papers (42 OT-CEC and 2 OT-LC & OT-CEC) did not report the retention factor and/or effective electrophoretic mobility of analytes. Considering all covered papers, the most popular activity was on the development of new chromatographic materials as coatings. However, we encourage OT-CEC researchers to not only characterise changes in the electroosmotic flow but also verify the interaction of the analytes with the coating. In addition, the articles reported were largely driven by stationary phase or support development and not by practical applications.
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Affiliation(s)
- Mohamed Adel Ahmed
- Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, Chemistry, University of Tasmania, Hobart, 7001, Australia
| | - Bren Mark B Felisilda
- Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, Chemistry, University of Tasmania, Hobart, 7001, Australia
| | - Joselito P Quirino
- Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences, Chemistry, University of Tasmania, Hobart, 7001, Australia.
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16
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Wang PL, Xie LH, Joseph EA, Li JR, Su XO, Zhou HC. Metal-Organic Frameworks for Food Safety. Chem Rev 2019; 119:10638-10690. [PMID: 31361477 DOI: 10.1021/acs.chemrev.9b00257] [Citation(s) in RCA: 272] [Impact Index Per Article: 54.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Food safety is a prevalent concern around the world. As such, detection, removal, and control of risks and hazardous substances present from harvest to consumption will always be necessary. Metal-organic frameworks (MOFs), a class of functional materials, possess unique physical and chemical properties, demonstrating promise in food safety applications. In this review, the synthesis and porosity of MOFs are first introduced by some representative examples that pertain to the field of food safety. Following that, the application of MOFs and MOF-based materials in food safety monitoring, food processing, covering preservation, sanitation, and packaging is overviewed. Future perspectives, as well as potential opportunities and challenges faced by MOFs in this field will also be discussed. This review aims to promote the development and progress of MOF chemistry and application research in the field of food safety, potentially leading to novel solutions.
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Affiliation(s)
- Pei-Long Wang
- Institute of Quality Standards and Testing Technology for Agro-products , Chinese Academy of Agricultural Sciences , Beijing 100081 , P. R. China.,Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China
| | - Lin-Hua Xie
- Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China
| | - Elizabeth A Joseph
- Department of Chemistry , Texas A&M University , P.O. Box 30012, College Station , Texas 77842-3012 , United States
| | - Jian-Rong Li
- Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China
| | - Xiao-Ou Su
- Institute of Quality Standards and Testing Technology for Agro-products , Chinese Academy of Agricultural Sciences , Beijing 100081 , P. R. China
| | - Hong-Cai Zhou
- Department of Chemistry , Texas A&M University , P.O. Box 30012, College Station , Texas 77842-3012 , United States
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17
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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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18
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Zhang J, Chen J, Peng S, Peng S, Zhang Z, Tong Y, Miller PW, Yan XP. Emerging porous materials in confined spaces: from chromatographic applications to flow chemistry. Chem Soc Rev 2019; 48:2566-2595. [DOI: 10.1039/c8cs00657a] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Porous materials confined within capillary columns/microfluidic devices are discussed, and progress in chromatographic and membrane separations and catalysis is reviewed.
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Affiliation(s)
- Jianyong Zhang
- Sun Yat-Sen University
- MOE Laboratory of Polymeric Composite and Functional Materials
- Guangzhou 510275
- China
| | - Junxing Chen
- Sun Yat-Sen University
- MOE Laboratory of Polymeric Composite and Functional Materials
- Guangzhou 510275
- China
| | - Sheng Peng
- Sun Yat-Sen University
- MOE Laboratory of Polymeric Composite and Functional Materials
- Guangzhou 510275
- China
| | - Shuyin Peng
- Sun Yat-Sen University
- MOE Laboratory of Polymeric Composite and Functional Materials
- Guangzhou 510275
- China
| | - Zizhe Zhang
- Sun Yat-Sen University
- MOE Laboratory of Polymeric Composite and Functional Materials
- Guangzhou 510275
- China
| | - Yexiang Tong
- Sun Yat-Sen University
- MOE Laboratory of Polymeric Composite and Functional Materials
- Guangzhou 510275
- China
| | | | - Xiu-Ping Yan
- State Key Laboratory of Food Science and Technology
- International Joint Laboratory on Food Safety
- School of Food Science and Technology
- Jiangnan University
- Wuxi 214122
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19
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Mao Z, Bao T, Li Z, Chen Z. Ionic liquid-copolymerized monolith incorporated with zeolitic imidazolate framework-8 as stationary phases for enhancing reversed phase selectivity in capillary electrochromatography. J Chromatogr A 2018; 1578:99-105. [PMID: 30337168 DOI: 10.1016/j.chroma.2018.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 10/05/2018] [Accepted: 10/09/2018] [Indexed: 12/31/2022]
Abstract
A novel ionic liquid (1-allyl-methylimidazolium chloride, AlMeIm+Cl-) polymer monolith poly(ionic liquid-co-ethylene dimethacrylate) incorporated with zeolitic imidazolate framework-8 (ZIF-8-poly(IL-co-EDMA)) was firstly synthesized as stationary phases of monolithic column for capillary electrochromatography by one-step copolymerization. Incorporation of ZIF-8 into ionic liquid polymer monolith evidently enhanced the separation selectivity for four alkylbenzenes in reversed phase capillary electrochromatography (CEC), due to the synergistic effect derived from the same imidazole ring structure of ionic liquid and organic ligands of ZIF-8. Meanwhile, electroosmotic flow (EOF) was generated by ionic liquid in a wide range of pH values from 2.0 to 12.0. The resultant monolithic columns were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR). The results indicated that the prepared monolithic columns had good permeability and mechanism stability. The resultant monolithic columns were applied for the separation of neutral compounds, anilines and phenols. The highest column efficiency was 2.07 × 105 plates m-1 (theoretical plates, N) for toluene. Under optimal conditions, reproducibility was obtained with relative standard deviations (RSDs) of the retention time for run-to-run, day-to-day, column-to-column and batch-to-batch were in the range of 1.58 - 3.19%, 1.92 - 3.87%, 3.84 - 4.96% and 2.63 - 4.33%, respectively. Incorporation ZIF-8 into ionic liquid polymer monolith was a promising way for the application of new materials in the fabrication of novel monolithic columns.
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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
| | - Tao Bao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China
| | - Zhentao Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China.
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20
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Wang X, Ye N, Hu X, Liu Q, Li J, Peng L, Ma X. Open-tubular capillary electrochromatographic determination of ten sulfonamides in tap water and milk by a metal-organic framework-coated capillary column. Electrophoresis 2018; 39:2236-2245. [PMID: 29799133 DOI: 10.1002/elps.201800047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/22/2018] [Accepted: 05/19/2018] [Indexed: 01/24/2023]
Abstract
In this study, a metal-organic framework (MOF), [Mn(cam)(bpy)], was synthesized and characterized by thermogravimetric analysis, scanning electron microscopy, and Fourier transform infrared spectrometry. An open-tubular capillary column was fabricated from [Mn(cam)(bpy)] via the amide coupling method. Ten types of sulfonamides were separated through the fabricated capillary column, which showed a good limits of detection (<0.07 μg/mL) and linear ranges (1-100 or 5-100 μg/mL) with a high correlation coefficients (R2 > 0.9987). The intra-day, inter-day and column-to-column relative standard deviations (RSDs) in the migration times ranged from 0.44 to 4.87%, and the peak area RSDs ranged from 0.80 to 7.28%. The developed capillary electrochromatography method can be successfully utilized for the determination of sulfonamides in tap water and milk samples.
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Affiliation(s)
- Xuan Wang
- Department of Chemistry, Capital Normal University, Beijing, P. R. China
| | - Nengsheng Ye
- Department of Chemistry, Capital Normal University, Beijing, P. R. China
| | - Xiaoyu Hu
- Department of Chemistry, Capital Normal University, Beijing, P. R. China
| | - Qingye Liu
- Department of Chemistry, Capital Normal University, Beijing, P. R. China
| | - Jian Li
- Beijing Institute of Veterinary Drugs Control, Beijing, P. R. China
| | - Lin Peng
- Department of Chemistry, Capital Normal University, Beijing, P. R. China
| | - Xiaotong Ma
- Department of Chemistry, Capital Normal University, Beijing, P. R. China
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21
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Chen K, Zhang L, Zhang W. Preparation and evaluation of open-tubular capillary column combining a metal-organic framework and a brush-shaped polymer for liquid chromatography. J Sep Sci 2018; 41:2347-2353. [DOI: 10.1002/jssc.201800121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/02/2018] [Accepted: 03/07/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Kai Chen
- Shanghai Key Laboratory of Functional Materials Chemistry; Department of Chemistry and Molecular Engineering; East China University of Science and Technology; Shanghai China
| | - Lingyi Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry; Department of Chemistry and Molecular Engineering; East China University of Science and Technology; Shanghai China
| | - Weibing Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry; Department of Chemistry and Molecular Engineering; East China University of Science and Technology; Shanghai China
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22
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Liu X, Sun S, Nie R, Ma J, Qu Q, Yang L. Highly uniform porous silica layer open-tubular capillary columns produced via in-situ biphasic sol–Gel processing for open-tubular capillary electrochromatography. J Chromatogr A 2018; 1538:86-93. [DOI: 10.1016/j.chroma.2018.01.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 12/23/2022]
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23
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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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24
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Zhang J, Chen Z. Metal-organic frameworks as stationary phase for application in chromatographic separation. J Chromatogr A 2017; 1530:1-18. [DOI: 10.1016/j.chroma.2017.10.065] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 10/24/2017] [Accepted: 10/26/2017] [Indexed: 12/15/2022]
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25
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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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26
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Tarongoy FM, Haddad PR, Quirino JP. Recent developments in open tubular capillary electrochromatography from 2016 to 2017. Electrophoresis 2017; 39:34-52. [PMID: 28815745 DOI: 10.1002/elps.201700280] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 11/11/2022]
Abstract
Interest in open-tubular capillary electrochromatography (OT-CEC) continues to thrive because of the inherent advantage of OT-CEC combining the high efficiency of capillary electrophoresis and the high selectivity of high performance liquid chromatography. For the period 2016 to 2017, novel materials have been developed as first-time stationary phases for OT-CEC and are grouped in this review as polymer-based materials, frameworks, nanoparticles, graphene-based materials, and biomaterials. Coating and fabrication methods mostly rely on covalent coating strategies while non-covalent immobilisation strategies like electrostatic assembly are notably still being employed. The concern of overcoming phase ratio challenges in OT-CEC coatings have also generated adoption of combined coating strategies including multi-layering, layer-by-layer self-assembly and methods adapted from nanofilm fabrications like epitaxial growth, liquid phase deposition, or nucleation of crystal growth. The emergence of non-conventional coating characterisation methods such as transmission electron microscopy, X-ray diffraction or X-ray photoelectron spectroscopy is also discussed.
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Affiliation(s)
- Faustino M Tarongoy
- Australian Centre for Research on Separation Science, School of Physical Sciences-Chemistry, University of Tasmania, Hobart, Tasmania, Australia.,Chemistry Department, College of Arts and Sciences, Xavier University-Ateneo de Cagayan, Cagayan de Oro, Misamis Oriental, Philippines
| | - Paul R Haddad
- Australian Centre for Research on Separation Science, School of Physical Sciences-Chemistry, University of Tasmania, Hobart, Tasmania, Australia
| | - Joselito P Quirino
- Australian Centre for Research on Separation Science, School of Physical Sciences-Chemistry, University of Tasmania, Hobart, Tasmania, Australia
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