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Applications of monolithic columns in capillary liquid chromatography
Holdšvendová, Petra ; Coufal, Pavel (advisor) ; Pacáková, Věra (referee) ; Cvačka, Josef (referee)
INTRODUCTION From the nineties of the twent5r's century [l], when appeared the first references about the new type ofthe stationary phases designated for HPLC called monoliths, these became to be the object of interest of several scientific groups [2-4]. Their uncontested advantage in comparison with classical columns is their high stability in pH range from 2 to 12 where there is no possibility to use the classical columns. other advantages are their easy and cheap preparation and the absence of frits on the ends of the separating medium because the monolith is covalently bound to the inner side of the capillary [5]. On the other hand, their disadvantage remains to be worse in reproducibility of the stationary phase preparation than in case of classical columns. This PhD Thesis is focused on monoliths based on organic polymers, mainly the methacrylate monoliths. For the first time, this ýpe of monoliths was shown by Peters et al. [6] and since then there have been made several monolithic phases based on different separating features 17_101. Methacrylate monoliths are convenient for separation of the low molecular substances L7l as well as the high molecular substances like the proteins, oligonucleotides or saccharides n0-121.
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Optimization of experimental conditions for measurements of perfluorinated organic acids by GC
Ston, Martin ; Čabala, Radomír (advisor) ; Coufal, Pavel (referee)
Commercial software Pro ezGC was used for calculation of optimal temperature program for analysis of isobutylesters of perfluorinated organic acids (C6 - C12) by gas chromatography with flame ionization detector. Optimization was done with respect to the complete resolution of all peaks of analytes. The calculated temperature program was also applied to the analysis of substances of interest on GC-MS. The calculated and measured values have been compared. The measured resolutions were higher than the calculated ones in all cases. Keywords: perfluorinated organic acids, isobutylesters, peak resolution Subject words: gas chromatography, numerical optimization
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The Titrimetric determination with thermometric detection.
Nohavová, Ivana ; Opekar, František (advisor) ; Coufal, Pavel (referee)
Thermometric detection is one of the less usual methods for the objective titration end- point detection. The temperature change at the reaction between an analyte and a titration reagent is monitored by a thermistor. Break-response to the volume of an added titrant indicates reaching the end point of the titration. Subject of this work is to develop a method for the titrimetric determination of acids and bases with this detection method.
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