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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Non-silica based materials in drug analysis III.
 Jiřičková, Nina ; Kučera, Radim (advisor) ; Štěrbová, Petra (referee)
Non-silica based materials in the drug analysis III. Diploma thesis Nina Brejchová
 Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Drug Analysis Sample preparation prior to an essay plays a key role in the drug analysis. Example of a widely used sample preparation technique is a Solid Phase Extraction. This method is characterised by high selectivity, which is given by the type of used sorbent. The aim of this thesis is to study the application of a new sorbent in Solid phase extraction which is zirconium oxide modified by graphene. Graphene is an allotropic modification of carbon possessing a specific adsorptive properties. Therefore it can be used besides other areas in chemical analysis. This thesis focuses on the testing on adsorptive capability of this sorbent using a mixture of model basic drugs. The attention was also paid to pH of solution used for conditioning of the sorbent and type of eluents. After the extraction, the samples were analysed by high- performance liquid chromatography, using a gradient elution. The most appropriate extraction environment was aqueous environment. Extraction recoveries obtained with the prepared sorbent were compared to those obtained with silica gel. The highest recoveries were obtained by extraction of...
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Non-silica based materials in drug analysis III.
 Jiřičková, Nina ; Kučera, Radim (advisor) ; Štěrbová, Petra (referee)
Non-silica based materials in the drug analysis III. Diploma thesis Nina Brejchová
 Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Drug Analysis Sample preparation prior to an essay plays a key role in the drug analysis. Example of a widely used sample preparation technique is a Solid Phase Extraction. This method is characterised by high selectivity, which is given by the type of used sorbent. The aim of this thesis is to study the application of a new sorbent in Solid phase extraction which is zirconium oxide modified by graphene. Graphene is an allotropic modification of carbon possessing a specific adsorptive properties. Therefore it can be used besides other areas in chemical analysis. This thesis focuses on the testing on adsorptive capability of this sorbent using a mixture of model basic drugs. The attention was also paid to pH of solution used for conditioning of the sorbent and type of eluents. After the extraction, the samples were analysed by high- performance liquid chromatography, using a gradient elution. The most appropriate extraction environment was aqueous environment. Extraction recoveries obtained with the prepared sorbent were compared to those obtained with silica gel. The highest recoveries were obtained by extraction of...
Detailed record

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