Hydrophilic interaction liquid chromatography is in the present time very often used for separation of polar compounds which are complicated separated in reverse phase HPLC or they are not sufficiently retained. Various stationary phases suitable for HILIC are commercially available and new stationary phases are still developing. In this work bare silica and isopropyl cyclofructan modified silica stationary phases were compared. Chromatographic behavior of sets of four pentapeptides and five nonapeptides was tested in detail under hydrophilic interaction liquid chromatography. Additionally, mobile phase composition changes the types of interaction and their strengths were studied using linear free energy relationship method. Obtained results denoted that the main role in the retention mechanism on the isopropyl cyclofructan stationary phases play hydrogen bond acidity and dipolarity/polarizibility, while dispersion interactions are preferred in the mobile phase. On the other hand, bare silica stationary phase provides only one interaction type - hydrogen bond acidity. Key words: peptides, cyclofructan, LFER, HILIC
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:323782 |
| Date | January 2013 |
| Creators | Šímová, Veronika |
| Contributors | Kalíková, Květa, Janečková, Lucie |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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