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Aydoğan C, Aslan H, Günyel Z, Demir N, Erdoğan İY, Alharthi S, El Rassi Z. Graphene oxide-octadecylsilane incorporated monolithic nano-columns with 50 μm id and 100 μm id for small molecule and protein separation by nano-liquid chromatography. Electrophoresis 2021; 42:2637-2646. [PMID: 34213776 DOI: 10.1002/elps.202100050] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 06/12/2021] [Accepted: 06/22/2021] [Indexed: 11/09/2022]
Abstract
In this study, graphene oxide-octadecylsilane incorporated monolithic nano-columns were developed for protein analysis by nano liquid chromatography (nano LC). The monolithic column with 100 μm id was first prepared by an in situ polymerization using ethylene dimethacrylate (EDMA), 3-chloro-2-hydroxypropylmethacrylate (HPMA-Cl), and methacryloyl graphene oxide nanoparticles (MGONPs). MGONPs were synthesized by the treatment of 3-(trimethoxysilyl)propylmethacrylate (TMSPM) and GO. Tetrahydrofuran (THF) and dodecanol were used as the porogenic solvent. The resulting column was functionalized by dimethyloctadecylch lorosilane (DODCS) for the enhancement of hydrophobicity. The functionalization greatly improved the baseline separation of hydrophobic compounds such as polyaromatic hydrocarbons (PAHs). The optimized monolith with respect to total polymerization mixture was characterized by using Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) X-ray diffraction (XRD) and chromatographic analyses. The blank monoliths without functionalization exhibited poor separation while a good separation performance of MGONPs functionalized monoliths was achieved. The monolith with 100 μm id was evaluated in protein separation in nano LC using RNase A, Cytochrome C, Lysozyme, Trypsin, and Ca isozyme II as the test proteins. It was shown that protein separation mechanism was based on large π-system of GO and hydrophobicity of the monolithic structure. Theoretical plates number up to 57 600 plates were achieved. The nano-column with 50 μm id was also prepared using the same polymerization mixture under the same chemical conditions. These nano-columns were employed for protein separation by nano LC, and the dependence of both nano-column performance on the internal diameter was also discussed.
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Affiliation(s)
- Cemil Aydoğan
- Food Analysis and Research Laboratory, Bingöl University, Bingöl, Turkey.,Department of Chemistry, Bingöl University, Bingöl, Turkey.,Department of Food Engineering, Bingöl University, Bingöl, Turkey
| | - Hakiye Aslan
- Food Analysis and Research Laboratory, Bingöl University, Bingöl, Turkey
| | - Zeynep Günyel
- Food Analysis and Research Laboratory, Bingöl University, Bingöl, Turkey
| | - Nurullah Demir
- Food Analysis and Research Laboratory, Bingöl University, Bingöl, Turkey
| | - İbrahim Y Erdoğan
- Department of Chemistry, Bingöl University, Bingöl, Turkey.,Faculty of Health Sciences, Bingöl University, Bingöl, Turkey
| | - Sarah Alharthi
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Ziad El Rassi
- Department of Chemistry Oklahoma State University, Stillwater, Oklahloma, USA
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Wu MF, Tsai HP, Hsieh CH, Lu YC, Pan LC, Yang H. Water-Soluble Chemical Vapor Detection Enabled by Doctor-Blade-Coated Macroporous Photonic Crystals. SENSORS 2020; 20:s20195503. [PMID: 32992878 PMCID: PMC7582252 DOI: 10.3390/s20195503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 11/17/2022]
Abstract
Water-soluble chemicals, involving a wide range of toxic chemicals in aqueous solutions, remain essential in both daily living or industrial uses. However, most toxicants are evaporated with water through their use and thus cause deleterious effects on the domestic environment and health in humans. Unfortunately, most current low-dose chemical vapor detection technologies are restricted by the use of sophisticated instruments and unable to promptly detect the quantity of diverse toxicants in a single analysis. To address these issues, this study reports the development of simple and fast chemical vapor detection using doctor-blade-coated macroporous poly(2-hydroxyethyl methacrylate)/poly(ethoxylated trimethylolpropane triacrylate) photonic crystals, in which the poly(2-hydroxyethyl methacrylate) has strong affinity to insecticide vapor owing to a favorable Gibbs free energy change for their mixing. The condensation of water-soluble chemical vapor therefore results in a significant reflection peak shift and an obvious color change. The visual colorimetric readout can be further improved by increasing the lattice spacing of the macroporous photonic crystals. Furthermore, the dependence of the reflection peak position on vapor pressure under actual conditions and the reproducibility of vapor detecting are also evaluated in this study.
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Affiliation(s)
- Min-Fang Wu
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (M.-F.W.); (C.-H.H.); (Y.-C.L.); (L.-C.P.)
| | - Hui-Ping Tsai
- Department of Civil Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan;
| | - Chia-Hua Hsieh
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (M.-F.W.); (C.-H.H.); (Y.-C.L.); (L.-C.P.)
| | - Yi-Cheng Lu
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (M.-F.W.); (C.-H.H.); (Y.-C.L.); (L.-C.P.)
| | - Liang-Cheng Pan
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (M.-F.W.); (C.-H.H.); (Y.-C.L.); (L.-C.P.)
| | - Hongta Yang
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan; (M.-F.W.); (C.-H.H.); (Y.-C.L.); (L.-C.P.)
- Correspondence:
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Zajickova Z, Nováková L, Svec F. Monolithic Poly(styrene-co-divinylbenzene) Columns for Supercritical Fluid Chromatography–Mass Spectrometry Analysis of Polypeptide. Anal Chem 2020; 92:11525-11529. [DOI: 10.1021/acs.analchem.0c02874] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zuzana Zajickova
- Department of Physical Sciences, Barry University, Miami Shores, Florida 33161, United States
| | - Lucie Nováková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
| | - Frantisek Svec
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic
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Alzahrani E. Organic Boronate Affinity Sorbent for Capture of cis-Diol Containing Compounds
Eman Alzahrani. ACTA ACUST UNITED AC 2019. [DOI: 10.14233/ajchem.2019.22108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Boronate affinity chromatography (BAC) is argued to be a critical tool in specific capture and separation of cis-diol containing compounds. In present study, organic boronate affinity monolith poly(3-acrylamido phenylboronic acid-co-ethylene dimethacrylate) (AAPBA-co-EDMA) is prepared through one-step in situ polymerization procedure within a micropipette through the application of a pre-polymerization mixture which contains functional monomer (3-acrylamido phenylboronic acid), cross-linker (ethylene dimethacrylate), porogenic solvent (methanol with poly ethylene glycol) and initiator (2,2-dimethoxy-2-phenyl-acetophenone). Following the optimization of time exposure to UV lamp with 365 nm, the macroporous organic boronate monolith was selected. Several approaches including SEM and BET analysis, FT-IR spectroscopy and measuring contact angle were applied in the characterization of the morphology of the monolith. Several cis-diol compounds that include catechol and galactose are applied in the assessment of the boronate affinity of the organic monolithic material. Additionally, the capture of glucose from urine sample is also conducted. The basic principle of the
approach is that boronic acid forms covalent bond with cis-diols in basic solutions whereas the ester bonds are dissociated under acidic media. By using the study results, monolith demonstrate good selectivity towards cis-diol containing compounds. Due to the hydrophilic property of monolith, the affinity chromatography monolith can be performed for several cis-diol compounds including glycoproteins and nucleosides. Also, fabrication of the organic boronate monolithic in microfluidic equipment is essential in facilitating the extraction of boronate affinity using small-volume samples.
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Affiliation(s)
- Eman Alzahrani
- Department of Chemistry, Faculty of Science, Taif University, Taif, Kingdom of Saudi Arabia
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