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Determination of semimetals in selected food samples
Gállová, Eva ; Vitoulová, Eva (oponent) ; Diviš, Pavel (vedoucí práce)
This diploma thesis deals with an optimization technique for the determination of semimetals in selected samples of food, which consists of sample digestion, preconcentration and detection of the elements. Preconcentration is usually chosen because these elements are contained in foods only in trace amounts, which are undetectable for some techniques. This work also made characteristics of semimetals, in terms of their functions in the body, of the occurrence in food and the consequences for the organism on their surplus or shortage. The chosen technique of preconcentration in this work was the preconcentration of titanium dioxide. When optimizing the techniques, however, was unlike the results published in literature, obtained low yield of elements sorbed on titanium dioxide, therefore the samples were measured by inductively coupled plasma mass spectrometry directly after their mineralization, wet digestion with low temperature. The results of this work indicate that the elements arsenic, boron and selenium are given technique detectable without preconcentration, whilst set germanium content in all samples failed, due to very low concentrations and therefore in these cases would be required preconcentration.
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Technology of fruity baby food and its monitoring
Gállová, Eva ; Babák, Libor (oponent) ; Vitoulová, Eva (vedoucí práce)
This bachelor thesis is showing technological procedure of fruit baby food production and its monitoring. It specifies the list of used fruits and ingredients for the production. It analyses particular pocedures of stuff processing and and production process from bringing the stuff to the factory to ready products delivery. It analyses toxic impacts and contamiators checkout as well, that may appear in fruit baby meals. There is a legislation part concerning manufacturing process of agricultural production and food inspection of Czech republic that showed defects on baby ready meals.
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Determination of semimetals in selected food samples
Gállová, Eva ; Vitoulová, Eva (oponent) ; Diviš, Pavel (vedoucí práce)
This diploma thesis deals with an optimization technique for the determination of semimetals in selected samples of food, which consists of sample digestion, preconcentration and detection of the elements. Preconcentration is usually chosen because these elements are contained in foods only in trace amounts, which are undetectable for some techniques. This work also made characteristics of semimetals, in terms of their functions in the body, of the occurrence in food and the consequences for the organism on their surplus or shortage. The chosen technique of preconcentration in this work was the preconcentration of titanium dioxide. When optimizing the techniques, however, was unlike the results published in literature, obtained low yield of elements sorbed on titanium dioxide, therefore the samples were measured by inductively coupled plasma mass spectrometry directly after their mineralization, wet digestion with low temperature. The results of this work indicate that the elements arsenic, boron and selenium are given technique detectable without preconcentration, whilst set germanium content in all samples failed, due to very low concentrations and therefore in these cases would be required preconcentration.
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Technology of fruity baby food and its monitoring
Gállová, Eva ; Babák, Libor (oponent) ; Vitoulová, Eva (vedoucí práce)
This bachelor thesis is showing technological procedure of fruit baby food production and its monitoring. It specifies the list of used fruits and ingredients for the production. It analyses particular pocedures of stuff processing and and production process from bringing the stuff to the factory to ready products delivery. It analyses toxic impacts and contamiators checkout as well, that may appear in fruit baby meals. There is a legislation part concerning manufacturing process of agricultural production and food inspection of Czech republic that showed defects on baby ready meals.
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