151
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Ide M, El-Roz M, De Canck E, Vicente A, Planckaert T, Bogaerts T, Van Driessche I, Lynen F, Van Speybroeck V, Thybault-Starzyk F, Van Der Voort P. Quantification of silanol sites for the most common mesoporous ordered silicas and organosilicas: total versus accessible silanols. Phys Chem Chem Phys 2013. [DOI: 10.1039/c2cp42811c] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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152
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Chromatographic Behavior of Aromatic Diamines in Hydro-Organic, Micellar and Submicellar Reversed Phase Liquid Chromatographic Modes. Chromatographia 2012. [DOI: 10.1007/s10337-012-2370-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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153
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Lopez JF, Pelaez GJ, Perez LD. Monitoring the formation of polystyrene/silica nanocomposites from vinyl triethoxysilane containing copolymers. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2842-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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154
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Poly-proline-based chiral stationary phases: A molecular dynamics study of triproline, tetraproline, pentaproline and hexaproline interfaces. J Chromatogr A 2012; 1265:70-87. [DOI: 10.1016/j.chroma.2012.09.075] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 09/14/2012] [Accepted: 09/17/2012] [Indexed: 11/22/2022]
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155
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Extension of the carotenoid test to superficially porous C18 bonded phases, aromatic ligand types and new classical C18 bonded phases. J Chromatogr A 2012; 1266:34-42. [DOI: 10.1016/j.chroma.2012.09.068] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 09/06/2012] [Accepted: 09/10/2012] [Indexed: 11/18/2022]
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156
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Marszałł MP, Sroka WD, Balinowska A, Mieszkowski D, Koba M, Kaliszan R. Ionic liquids as mobile phase additives for feasible assay of naphazoline in pharmaceutical formulation by HPTLC-UV-densitometric method. J Chromatogr Sci 2012; 51:560-5. [PMID: 23076785 DOI: 10.1093/chromsci/bms168] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A specific and reliable high-performance thin layer chromatography method with densitometry detection has been developed for the determination of naphazoline nitrate in nasal drops. The best separation of the basic analyte, without spot tailing, was achieved by using a mobile phase composed of acetonitrile-water (60:40, v/v), adding 1.5 % (v/v) imidazolium-class ionic liquid and covering the plates with a stationary phase based on RP-18 with F254S (10 × 20 cm). The presented results confirm that imidazolium tetrafluoroborate ionic liquids are efficient suppressors of free silanols, which are considered to be responsible for troublesome and irreproducible chromatographic determinations of basic compounds. The developed chromatographic system was found to be convenient in use and to provide a repeatable assay of naphazoline nitrate in nasal drops, which could not be obtained with the use of standard silanol suppressing mobile phase additives such as triethylamine or dimethyloctylamine.
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Affiliation(s)
- Michał Piotr Marszałł
- Department of Medicinal Chemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, Jurasza 2, 85-094 Bydgoszcz, Poland.
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157
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Fernández-Navarro J, Torres-Lapasió J, Ruiz-Ángel M, García-Álvarez-Coque M. 1-Hexyl-3-methyl imidazolium tetrafluoroborate: An efficient column enhancer for the separation of basic drugs by reversed-phase liquid chromatography. J Chromatogr A 2012; 1258:168-74. [DOI: 10.1016/j.chroma.2012.08.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 08/13/2012] [Accepted: 08/14/2012] [Indexed: 11/29/2022]
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158
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Kara D, Fisher A. Modified Silica Gels and Their Use for the Preconcentration of Trace Elements. SEPARATION AND PURIFICATION REVIEWS 2012. [DOI: 10.1080/15422119.2011.608765] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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159
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Benali M, Aillet T, Saleh K. Effect of operating conditions on the hydrophobisation of silica-based porous particles in a fluidised-bed reactor: Temperature effect. ADV POWDER TECHNOL 2012. [DOI: 10.1016/j.apt.2011.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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160
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Jayanthi S, Frydman V, Vega S. Dynamic Deuterium Magic Angle Spinning NMR of a Molecule Grafted at the Inner Surface of a Mesoporous Material. J Phys Chem B 2012; 116:10398-405. [DOI: 10.1021/jp3061152] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Jayanthi
- Department of Chemical
Physics, Weizmann Institute of Science, Rechovot, Israel 76100
| | - V. Frydman
- Department of Chemical
Physics, Weizmann Institute of Science, Rechovot, Israel 76100
| | - S. Vega
- Department of Chemical
Physics, Weizmann Institute of Science, Rechovot, Israel 76100
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161
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Bolivar JM, Nidetzky B. Positively charged mini-protein Zbasic2 as a highly efficient silica binding module: opportunities for enzyme immobilization on unmodified silica supports. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10040-10049. [PMID: 22668007 DOI: 10.1021/la3012348] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Silica is a highly attractive support material for protein immobilization in a wide range of biotechnological and biomedical-analytical applications. Without suitable derivatization, however, the silica surface is not generally usable for attachment of proteins. We show here that Z(basic2) (a three α-helix bundle mini-protein of 7 kDa size that exposes clustered positive charges from multiple arginine residues on one side) functions as highly efficient silica binding module (SBM), allowing chimeras of target protein with SBM to become very tightly attached to underivatized glass at physiological pH conditions. We used two enzymes, d-amino acid oxidase and sucrose phosphorylase, to demonstrate direct immobilization of Z(basic2) protein from complex biological samples with extremely high selectivity. Immobilized enzymes displayed full biological activity, suggesting that their binding to the glass surface had occurred in a preferred orientation via the SBM. We also show that charge complementarity was the main principle of affinity between SBM and glass surface, and Z(basic2) proteins were bound in a very strong, yet fully reversible manner, presumably through multipoint noncovalent interactions. Z(basic2) proteins were immobilized on porous glass in a loading of 30 mg protein/g support or higher, showing that attachment via the SBM combines excellent binding selectivity with a technically useful binding capacity. Therefore, Z(basic2) and silica constitute a fully orthogonal pair of binding module and insoluble support for oriented protein immobilization, and this opens up new opportunities for the application of silica-based materials in the development of supported heterogeneous biocatalysts.
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Affiliation(s)
- Juan M Bolivar
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Graz, Austria
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162
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Yu H, Jia C, Wu H, Song G, Jin Y, Ke Y, Liang X. Highly stable high performance liquid chromatography stationary phase based on direct chemical modification of organic bridges in hybrid silica. J Chromatogr A 2012; 1247:63-70. [DOI: 10.1016/j.chroma.2012.05.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 05/16/2012] [Accepted: 05/16/2012] [Indexed: 10/28/2022]
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163
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Bocian S, Buszewski B. Residual silanols at reversed-phase silica in HPLC - a contribution for a better understanding. J Sep Sci 2012; 35:1191-200. [DOI: 10.1002/jssc.201200055] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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164
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Fernández-Navarro JJ, Ruiz-Ángel MJ, García-Álvarez-Coque MC. Reversed-phase liquid chromatography without organic solvent for determination of tricyclic antidepressants. J Sep Sci 2012; 35:1303-9. [DOI: 10.1002/jssc.201101106] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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165
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Giovannoli C, Passini C, Baravalle P, Anfossi L, Giraudi G, Baggiani C. An innovative approach to molecularly imprinted capillaries for polar templates by grafting polymerization. J Mol Recognit 2012; 25:377-82. [DOI: 10.1002/jmr.2186] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Cristina Giovannoli
- Laboratory of Bioanalytical Chemistry, Department of Chemistry; University of Torino; 10125; Torino; Italy
| | - Cinzia Passini
- Laboratory of Bioanalytical Chemistry, Department of Chemistry; University of Torino; 10125; Torino; Italy
| | - Patrizia Baravalle
- Laboratory of Bioanalytical Chemistry, Department of Chemistry; University of Torino; 10125; Torino; Italy
| | - Laura Anfossi
- Laboratory of Bioanalytical Chemistry, Department of Chemistry; University of Torino; 10125; Torino; Italy
| | - Gianfranco Giraudi
- Laboratory of Bioanalytical Chemistry, Department of Chemistry; University of Torino; 10125; Torino; Italy
| | - Claudio Baggiani
- Laboratory of Bioanalytical Chemistry, Department of Chemistry; University of Torino; 10125; Torino; Italy
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166
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Vandeventer PE, Lin JS, Zwang TJ, Nadim A, Johal MS, Niemz A. Multiphasic DNA adsorption to silica surfaces under varying buffer, pH, and ionic strength conditions. J Phys Chem B 2012; 116:5661-70. [PMID: 22537288 DOI: 10.1021/jp3017776] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reversible interactions between DNA and silica are utilized in the solid phase extraction and purification of DNA from complex samples. Chaotropic salts commonly drive DNA binding to silica but inhibit DNA polymerase amplification. We studied DNA adsorption to silica using conditions with or without chaotropic salts through bulk depletion and quartz crystal microbalance (QCM) experiments. While more DNA adsorbed to silica using chaotropic salts, certain buffer conditions without chaotropic salts yielded a similar amount of eluted DNA. QCM results indicate that under stronger adsorbing conditions the adsorbed DNA layer is initially rigid but becomes viscoelastic within minutes. These results qualitatively agreed with a mathematical model for a multiphasic adsorption process. Buffer conditions that do not require chaotropic salts can simplify protocols for nucleic acid sample preparation. Understanding how DNA adsorbs to silica can help optimize nucleic acid sample preparation for clinical diagnostic and research applications.
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Affiliation(s)
- Peter E Vandeventer
- Keck Graduate Institute of Applied Life Sciences , 535 Watson Drive, Claremont, California 91711, United States
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167
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Evaluation of new mixed-mode UHPLC stationary phases and the importance of stationary phase choice when using low ionic-strength mobile phase additives. Talanta 2012; 93:99-105. [DOI: 10.1016/j.talanta.2012.01.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 01/19/2012] [Accepted: 01/29/2012] [Indexed: 11/23/2022]
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168
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Ashu-Arrah BA, Glennon JD, Albert K. Preparation and characterization of bonded silica hydride intermediate from triethoxysilane and dimethylmethoxysilane using supercritical carbon dioxide and dioxane as reaction medium. J Chromatogr A 2012; 1236:42-50. [DOI: 10.1016/j.chroma.2012.02.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 02/18/2012] [Accepted: 02/20/2012] [Indexed: 11/24/2022]
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169
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Buszewski B, Bocian S, Rychlicki G, Matyska M, Pesek J. Determination of accessible silanols groups on silica gel surfaces using microcalorimetric measurements. J Chromatogr A 2012; 1232:43-6. [DOI: 10.1016/j.chroma.2011.08.094] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 08/18/2011] [Accepted: 08/31/2011] [Indexed: 11/25/2022]
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170
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Fernández-Navarro J, Torres-Lapasió J, Ruiz-Ángel M, García-Álvarez-Coque M. Silanol suppressing potency of alkyl-imidazolium ionic liquids on C18 stationary phases. J Chromatogr A 2012; 1232:166-75. [DOI: 10.1016/j.chroma.2011.11.054] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 11/22/2011] [Accepted: 11/23/2011] [Indexed: 11/28/2022]
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171
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Preparation and characterization of a poly(methyloctadecylsiloxane) thermally immobilized onto zirconized silica stationary phase for high-performance liquid chromatography. J Chromatogr A 2012; 1232:248-56. [DOI: 10.1016/j.chroma.2011.12.073] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 12/06/2011] [Accepted: 12/21/2011] [Indexed: 11/22/2022]
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172
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Hall K, Ashtari M, Cann NM. On simulations of complex interfaces: Molecular dynamics simulations of stationary phases. J Chem Phys 2012; 136:114705. [DOI: 10.1063/1.3693516] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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173
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Heaton J, Gray N, Cowan DA, Plumb RS, Legido-Quigley C, Smith NW. Comparison of reversed-phase and hydrophilic interaction liquid chromatography for the separation of ephedrines. J Chromatogr A 2012; 1228:329-37. [DOI: 10.1016/j.chroma.2011.09.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/09/2011] [Accepted: 09/12/2011] [Indexed: 11/26/2022]
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174
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Petruczynik A. Effect of Ionic Liquid Additives to Mobile Phase on Separation and System Efficiency for HPLC of Selected Alkaloids on Different Stationary Phases. J Chromatogr Sci 2012; 50:287-93. [DOI: 10.1093/chromsci/bms004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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175
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Sousa J, Alves G, Fortuna A, Falcão A. Analytical methods for determination of new fluoroquinolones in biological matrices and pharmaceutical formulations by liquid chromatography: a review. Anal Bioanal Chem 2012; 403:93-129. [DOI: 10.1007/s00216-011-5706-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 12/24/2011] [Accepted: 12/29/2011] [Indexed: 11/25/2022]
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176
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Bi W, Zhou J, Row KH. Preparation and Application of Ionic Liquid-Modified Stationary Phases in High Performance Liquid Chromatography. SEP SCI TECHNOL 2012. [DOI: 10.1080/01496395.2011.608402] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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177
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Kawahara K, Tachibana H, Hagiwara Y, Kuroda K. A spherosilicate oligomer with eight stable silanol groups as a building block of hybrid materials. NEW J CHEM 2012. [DOI: 10.1039/c2nj20953e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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178
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179
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Bair MD, Dorsey JG. Effect of trimethylsilane pre-capping on monomeric C18 stationary phases made from high-purity type-B silica substrates: Efficiency, retention, and stability. J Chromatogr A 2012; 1220:35-43. [DOI: 10.1016/j.chroma.2011.11.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2011] [Revised: 11/17/2011] [Accepted: 11/18/2011] [Indexed: 11/27/2022]
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180
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Effect of pH on monolayer properties of colloidal silica particles at the air/water interface. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2553-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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181
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Mello R, Martínez-Ferrer J, Alcalde-Aragonés A, Varea T, Acerete R, González-Núñez ME, Asensio G. Reactions at Interfaces: Oxygenation of n-Butyl Ligands Anchored on Silica Surfaces with Methyl(trifluoromethyl)dioxirane. J Org Chem 2011; 76:10129-39. [DOI: 10.1021/jo2019703] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rossella Mello
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
| | - Jaime Martínez-Ferrer
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
| | - Ana Alcalde-Aragonés
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
| | - Teresa Varea
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
| | - Rafael Acerete
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
| | - María Elena González-Núñez
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
| | - Gregorio Asensio
- Departamento de Química Orgánica,
Facultad
de Farmacia, Universidad de Valencia, Avda.
Vicente Andrés Estellés s.n., 46100-Burjassot, Valencia,
Spain
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182
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Flieger J, Czajkowska-Żelazko A. IONIC LIQUIDS AS MOBILE PHASE ADDITIVES IN REVERSED-PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.587220] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- J. Flieger
- a Department of Chemistry , Medical University of Lublin , Lublin, Poland
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183
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Contributions to reversed-phase column selectivity. II. Cation exchange. J Chromatogr A 2011; 1218:7110-29. [DOI: 10.1016/j.chroma.2011.07.085] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/18/2011] [Accepted: 07/26/2011] [Indexed: 11/19/2022]
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184
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The retention behaviour of polar compounds on zirconia based stationary phases under hydrophilic interaction liquid chromatography conditions. J Chromatogr A 2011; 1218:6981-6. [DOI: 10.1016/j.chroma.2011.07.100] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 07/19/2011] [Accepted: 07/26/2011] [Indexed: 11/24/2022]
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185
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Ikeda T, Kuroda A. Why does the silica-binding protein “Si-tag” bind strongly to silica surfaces? Implications of conformational adaptation of the intrinsically disordered polypeptide to solid surfaces. Colloids Surf B Biointerfaces 2011; 86:359-63. [DOI: 10.1016/j.colsurfb.2011.04.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Revised: 03/15/2011] [Accepted: 04/12/2011] [Indexed: 10/18/2022]
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186
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Ashtari M, Cann N. Proline-based chiral stationary phases: A molecular dynamics study of the interfacial structure. J Chromatogr A 2011; 1218:6331-47. [DOI: 10.1016/j.chroma.2011.06.096] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 06/24/2011] [Accepted: 06/27/2011] [Indexed: 10/18/2022]
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187
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Zhang Y, Luo H, Carr PW. Silica-based, hyper-crosslinked acid stable stationary phases for high performance liquid chromatography. J Chromatogr A 2011; 1228:110-24. [PMID: 21906745 DOI: 10.1016/j.chroma.2011.07.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 07/26/2011] [Accepted: 07/29/2011] [Indexed: 10/17/2022]
Abstract
A new family of hyper-crosslinked (HC) phases for use under very aggressive acid conditions including those encountered in ultra-fast, high temperature two-dimensional liquid chromatography (2DLC) has been recently introduced. This type of stationary phase shows significantly enhanced acid and thermal stability compared to the most acid stable, commercial RPLC phases. In addition, the use of "orthogonal" chemistry to make surface-confined polymer networks ensures good reproducibility and high efficiency. One of the most interesting features of the HC phases is the ability to derivatize the surface aromatic groups with various functional groups. This has led to the development of a family of hyper-crosslinked phases possessing a wide variety of chromatographic selectivities by attaching hydrophobic (e.g. -C₈), ionizable (e.g. -COOH, -SO₃H), aromatic (e.g. -toluene) or polar (e.g. -OH) species to the aromatic polymer network. HC reversed phases with various degrees of hydrophobicity and mixed-mode HC phases with added strong and weak cation exchange sites have been synthesized, characterized and applied. These silica-based acid-stable HC phases, with their attractive chromatographic properties, should be very useful in the separation of bases or biological analytes in acidic media, especially at elevated temperatures. This work reviews prior research on HC phases and introduces a novel HC phase made by alternative chemistry.
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Affiliation(s)
- Yu Zhang
- Department of Chemistry, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455, USA
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188
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Wiest LA, Jensen DS, Hung CH, Olsen RE, Davis RC, Vail MA, Dadson AE, Nesterenko PN, Linford MR. Pellicular Particles with Spherical Carbon Cores and Porous Nanodiamond/Polymer Shells for Reversed-Phase HPLC. Anal Chem 2011; 83:5488-501. [DOI: 10.1021/ac200436a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Pavel N. Nesterenko
- Australian Centre for Research on Separation Science (ACROSS), School of Chemistry, University of Tasmania, Hobart 7001, Australia
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189
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Lopez JF, Perez LD, Lopez BL. Effect of silica modification on the chemical interactions in NBR-based composites. J Appl Polym Sci 2011. [DOI: 10.1002/app.34296] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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190
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Newby JJ, Legg MA, Rogers B, Wirth MJ. Annealing of silica to reduce the concentration of isolated silanols and peak tailing in reverse phase liquid chromatography. J Chromatogr A 2011; 1218:5131-5. [PMID: 21705003 DOI: 10.1016/j.chroma.2011.05.080] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 05/19/2011] [Accepted: 05/23/2011] [Indexed: 11/16/2022]
Abstract
Non-porous, colloidal silica particles were annealed at three different temperatures, 800, 900 and 1050 °C. The adsorption of lysozyme, a probe of surface roughness, was consistent with progressively reduced surface roughness as temperature increased. The heat treated silica particles were rehydroxylated and then used to pack UHPLC columns. The cationic protein lysozyme was used to probe silanol activity, which exhibited progressively less tailing as the annealing temperature increased. FTIR spectroscopy confirmed that the abundance of isolated silanols on the surface was reduced by annealing at 900 °C or 1050 °C. FTIR also revealed that there was markedly increased hydrogen bonding of the isolated silanols to neighbors after rehydroxylation. These results combine to support the hypothesis that (a) isolated silanols on silica cause tailing in RP-LC and (b) nonplanar topography gives rise to isolated silanols.
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Affiliation(s)
- Josh J Newby
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA
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191
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Platinum catalysts supported on silicas: effect of silica characteristics on their catalytic activity in carbon monoxide oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2011. [DOI: 10.1007/s11144-011-0324-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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192
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Mekhaev AV, Pestov AV, Molochnikov LS, Kovaleva EG, Yatluk YG, Grigor’ev IA, Kirilyuk IA. Investigation of the structure of chitosan hybrid systems by pH-sensitive nitroxyl radical. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2011. [DOI: 10.1134/s0036024411060239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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193
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Ahmed S, Atia NN, Mohamed NA. Dual separation mode for simultaneous determination of antihypertensive drug combinations by high-performance liquid chromatography. Talanta 2011; 84:666-72. [DOI: 10.1016/j.talanta.2011.01.066] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 01/22/2011] [Accepted: 01/26/2011] [Indexed: 11/25/2022]
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194
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Borges EM, Collins CH. Chromatographic evaluation using basic solutes of the silanol activity of stationary phases based on poly(methyloctylsiloxane) immobilized onto silica. J Sep Sci 2011; 34:1141-8. [DOI: 10.1002/jssc.201000700] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 02/22/2011] [Accepted: 02/24/2011] [Indexed: 11/07/2022]
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195
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Edström L, Samuelsson J, Fornstedt T. Deformations of overloaded bands under pH-stable conditions in reversed phase chromatography. J Chromatogr A 2011; 1218:1966-73. [DOI: 10.1016/j.chroma.2010.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 08/25/2010] [Accepted: 09/01/2010] [Indexed: 11/29/2022]
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196
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Scully N, Ashu-Arrah B, Nagle A, Omamogho J, O'Sullivan G, Friebolin V, Dietrich B, Albert K, Glennon J. Silica hydride intermediate for octadecylsilica and phenyl bonded phase preparation via heterogeneous hydrosilation in supercritical carbon dioxide. J Chromatogr A 2011; 1218:1974-82. [DOI: 10.1016/j.chroma.2010.11.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/17/2010] [Accepted: 11/22/2010] [Indexed: 10/18/2022]
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197
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Li R, Yuan Q, Zhang Y, Ling J, Han T. HYDROPHILIC INTERACTION CHROMATOGRAPHIC DETERMINATION OF OXYTETRACYCLINE IN THE ENVIRONMENTAL WATER USING SILICA COLUMN. J LIQ CHROMATOGR R T 2011. [DOI: 10.1080/10826076.2011.556971] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ruiping Li
- a Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University , Yichang, China
| | - Qin Yuan
- a Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University , Yichang, China
| | - Yi Zhang
- a Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University , Yichang, China
| | - Jing Ling
- a Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University , Yichang, China
| | - Tiantian Han
- a Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University , Yichang, China
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198
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Buszewski B, Bocian S, Rychlicki G. Investigation of silanol activity on the modified silica surfaces using microcalorimetric measurements. J Sep Sci 2011; 34:773-9. [DOI: 10.1002/jssc.201000736] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 12/22/2010] [Accepted: 01/22/2011] [Indexed: 11/11/2022]
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199
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Stationary and mobile phases in hydrophilic interaction chromatography: a review. Anal Chim Acta 2011; 692:1-25. [PMID: 21501708 DOI: 10.1016/j.aca.2011.02.047] [Citation(s) in RCA: 489] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 02/14/2011] [Accepted: 02/18/2011] [Indexed: 11/22/2022]
Abstract
Hydrophilic interaction chromatography (HILIC) is valuable alternative to reversed-phase liquid chromatography separations of polar, weakly acidic or basic samples. In principle, this separation mode can be characterized as normal-phase chromatography on polar columns in aqueous-organic mobile phases rich in organic solvents (usually acetonitrile). Highly organic HILIC mobile phases usually enhance ionization in the electrospray ion source of a mass spectrometer, in comparison to mobile phases with higher concentrations of water generally used in reversed-phase (RP) LC separations of polar or ionic compounds, which is another reason for increasing popularity of this technique. Various columns can be used in the HILIC mode for separations of peptides, proteins, oligosaccharides, drugs, metabolites and various natural compounds: bare silica gel, silica-based amino-, amido-, cyano-, carbamate-, diol-, polyol-, zwitterionic sulfobetaine, or poly(2-sulphoethyl aspartamide) and other polar stationary phases chemically bonded on silica gel support, but also ion exchangers or zwitterionic materials showing combined HILIC-ion interaction retention mechanism. Some stationary phases are designed to enhance the mixed-mode retention character. Many polar columns show some contributions of reversed phase (hydrophobic) separation mechanism, depending on the composition of the mobile phase, which can be tuned to suit specific separation problems. Because the separation selectivity in the HILIC mode is complementary to that in reversed-phase and other modes, combinations of the HILIC, RP and other systems are attractive for two-dimensional applications. This review deals with recent advances in the development of HILIC phase separation systems with special attention to the properties of stationary phases. The effects of the mobile phase, of sample structure and of temperature on separation are addressed, too.
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200
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Maeno K, Hirayama A, Sakuma K, Miyazawa K. An activated medium with high durability and low nonspecific adsorption: Application to protein A chromatography. Anal Biochem 2011; 409:123-9. [DOI: 10.1016/j.ab.2010.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Revised: 09/28/2010] [Accepted: 10/04/2010] [Indexed: 11/27/2022]
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