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Utilizing of Electron Microscopy for Nanoparticle Detection in Selected Food
 Boriková, Natália ; Hrabalová, Vendula (referee) ; Dzurická, Lucia (advisor)
This bachelor thesis deals with the detection of nanoparticles in selected food products using electron microscopy. Specifically, silver pearls, silver powder and food grade whiteness were selected for this purpose. Nanoparticles themselves can have a negative effect on the human body in high concentrations. They need to meet certain legislative standards. The main focus of this bachelor thesis is how nanoparticles could be detected in food. The theoretical part provides an insight into the properties of nanoparticles, their applications and describes methods for their determination, primarily with an emphasis on electron microscopy. In the practical part, solvents with artificially added nanoparticles were prepared and served as standards. Two samples were prepared from selected foods – with and without the addition of nanoparticles. They were analysed using low-energy electron microscope of LVEM 25E type along with elemental analysis using energy dispersive spectroscopy (EDS). The results provide the compositions of the foodstuffs in question and information on the presence of nanoparticles on their own. This research contributes to a better understanding of their characteristics and safety.
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