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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Enantioselektivní potenciál sulfobutylether-β-cyklodextrinové chirální stacionární fáze / Enantioselective potential of sulfobutylether-β-cyclodextrin based chiral stationary phase

Folprechtová, Denisa January 2018 (has links)
The aim of this diploma thesis was to prepare two new chiral stationary phases by dynamic coating of sulphobutylether-β-cyclodextrin (SBE-β-CD) with varying degrees of substitution onto strong anion-exchange stationary phases. The enantioselective potential and stability of the newly prepared chiral stationary phases were tested using a set of chiral analytes. The set contained structurally diverse analytes, i.e. benzodiazepines (oxazepam, lorazepam), phenothiazines (thioridazine, promethazine), β-blockers (labetalol, pindolol, propranolol, alprenolol), profens (carprofen, fenoprofen, flurbiprofen, indoprofen), flavanones (6-hydroxyflavanone, 7-hydroxyflavanone), DL-tryptophan and its derivatives (5-OH-DL-tryptophan, 5-F-DL-tryptophan, DL-tryptophan butylester and blocked aminoacid (t-Boc-DL-tryptophan)), dipeptides (glycyl-DL-phenylalanine, glycyl-DL-tryptophan) and Troger's base. Measurements were carried out in reversed-phase high-performance liquid chromatography. Mobile phases consisted of methanol/formic acid (pH 2.10) and methanol/10mmol l-1 ammonium acetate buffer (pH 4.00) in various volume ratios. The chiral stationary phase containing hexasubstituted SBE-β-CD was suitable for enantioseparation of eleven analytes. Four of them were baseline enantioresolved and seven partially. The chiral...

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