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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sakeye, Motolani Wiedmer, Susanne K. Riekkola, Marja-Liisa Baños-Pérez, Clara D'Orazio, Giovanni Ruiz-Jiménez, José Smått, Jan-Henrik Kivilompolo, Maarit Kopperi, Matias Fanali, Salvatore Bourdin, Delphine |
| Description | Country affiliation: Finland Author Affiliation: Wiedmer SK ( Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, Helsinki, Finland.) |
| Abstract | The need for novel packing materials in both capillary electrochromatography (CEC) and capillary liquid chromatography (CLC) is apparent and the development towards more selective, application-oriented chromatographic phases is under progress world-wide. In this study we have synthesized new polyethyleneimine (PEI) functionalized Mn(2)O(3), SiO(2), SnO(2), and ZrO(2) particles for the fabrication of packed capillary columns for CEC and CLC. The nanocasting approach was successful for the preparation of functionalized metal oxide materials with a controlled porosity and morphology. PEI functionalization was done using ethyleneimine monomers to create particles which are positively charged in aqueous solution below pH 9. This functionalization allowed the possibility to have both hydrophobic (due to its alkyl chain) and ionic interactions (due to positively charged amino groups) with selected compounds. For comparison aminopropyl-functionalized silica was also synthesized and tested. Both slurry pressure and electrokinetic packing procedures used gave similar results, but fast sedimentation of the material caused some problems during the packing. The high stability and wide pH range of PEI-functionalized SiO(2) material, with potential for hydrophobic and electrostatic interactions, proved to be useful for the CEC and CLC separation of some model acidic and neutral compounds. |
| ISSN | 00219673 |
| Issue Number | 30 |
| Volume Number | 1218 |
| e-ISSN | 18733778 |
| Journal | Journal of Chromatography A |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-07-29 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Capillary Electrochromatography Instrumentation Chromatography, Liquid Oxides Chemistry Polyethyleneimine Benzoates Hydrogen-ion Concentration Hydrophobic And Hydrophilic Interactions Magnesium Oxide Osmolar Concentration Particle Size Silicon Dioxide Tin Compounds Zirconium Journal Article Research Support, Non-u.s. Gov't Discipline Analytical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Medicine Analytical Chemistry Biochemistry |
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