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Fast methods for analysis of migrants from food-contact materials
Vavrouš, Adam ; Čabala, Radomír (advisor) ; Jelínek, Ivan (referee) ; Bajerová, Petra (referee)
(AJ) Food contact materials pose a risk to human health due to a variety of contaminants which they can release into food. These compounds, migrants, include aromatic hydrocarbons, dialkyl phthalates, bisphenols, printing ink photoinitiators, and perfluoroalkyl compounds. The determination of all these substances can be expensive and time-consuming since universally applicable analytical approaches are not available nowadays. This work attempted to develop methods for the simultaneous determination of migrants from all of the mentioned groups in paper-based food contact materials and fatty food. A total of 68 contaminants were studied in paper products using liquid chromatography and gas chromatography coupled with tandem mass spectrometry detection. All analytes were isolated simultaneously using the modified "QuEChERS" method. This method demonstrated acceptable recovery and repeatability for most analytes in the validation study; LOQs ranged from 1.3 to 220 µg/kg. Analysis of 132 real paper products confirmed the occurrence of almost all studied analytes, which were often present in complex mixtures and at concentrations up to 628 mg/kg. A total of 41 potential contaminants were monitored in fatty foods by liquid chromatography with tandem mass detection. Contamination of the mobile phase by...
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Fast methods for analysis of migrants from food-contact materials
Vavrouš, Adam ; Čabala, Radomír (advisor) ; Jelínek, Ivan (referee) ; Bajerová, Petra (referee)
(AJ) Food contact materials pose a risk to human health due to a variety of contaminants which they can release into food. These compounds, migrants, include aromatic hydrocarbons, dialkyl phthalates, bisphenols, printing ink photoinitiators, and perfluoroalkyl compounds. The determination of all these substances can be expensive and time-consuming since universally applicable analytical approaches are not available nowadays. This work attempted to develop methods for the simultaneous determination of migrants from all of the mentioned groups in paper-based food contact materials and fatty food. A total of 68 contaminants were studied in paper products using liquid chromatography and gas chromatography coupled with tandem mass spectrometry detection. All analytes were isolated simultaneously using the modified "QuEChERS" method. This method demonstrated acceptable recovery and repeatability for most analytes in the validation study; LOQs ranged from 1.3 to 220 µg/kg. Analysis of 132 real paper products confirmed the occurrence of almost all studied analytes, which were often present in complex mixtures and at concentrations up to 628 mg/kg. A total of 41 potential contaminants were monitored in fatty foods by liquid chromatography with tandem mass detection. Contamination of the mobile phase by...
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Strategic analysis of the company Farma Ptýrov
Bajerová, Petra ; Sieber, Patrik (advisor) ; Štamfestová, Petra (referee)
The aim of this Bachelor´s thesis is a Strategic analysis of the company EkoFarma Ptýrovec s.r.o. Current situation of the company and attractiveness of the field are evaluated according to the results of strategic analysis and then recommendations for the future development are made. This thesis is divided into theoretical and practical part. In the theoretical part there is described methodology of analyses. The practical part contains introduction of the company, analysis of the external and internal environment such as PESTLE analysis, analysis of the industry, maps of the competitive groups and Porter´s model of five competitive forces. The next steps are VRIO analysis, financial and SWOT analysis. The final part is focused on making recommendations and summarizing.
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