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Speciation and fractionation analysis of metals in agricultural soils
Lepař, Petr ; Mládková, Zuzana (referee) ; Diviš, Pavel (advisor)
This bachelor thesis deals with the procedures and analytical techniques associated with speciation analysis and fractionation of metals in agricultural soils. The first part defines the basic concepts related to speciation, fractionation, soils and elements contained within it. The following chapters describe procedures of samples withdrawal and its adjustment including a description of some methods used for the purpose of extraction, fractionation and speciation analysis. The last chapter is devoted to listing of some separation techniques and instrumental methods used for the purposes of speciation and fractionation.
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Occurence of potential alergenic components with metal content in cosmetic preparations
Krakovková, Lenka ; Janoušková, Eva (referee) ; Zemanová, Jana (advisor)
The aim of the bachelor thesis is to summarize potential allergenic metals contained in cosmetics, make an overview of raw materials used for cosmetics, and describe types of allergenic reactions caused by potential allergenic metals. All the metals presented are divided into two groups, from which one contains established allergens and the other one contains potential allergens, which can have influence on inducing of an allergetic reaction. There is shown a possible allergenic reaction for each metal, and its possible occurence in raw materials for a production of cosmetics, which are discussed in this work as well. There are also shown methods for determining the amount of metals in cosmetics. In the conclusion, there are mentioned some reasons of monitoring potencial allergens from series of metals.
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Characterization of atmospheric particulate matter by diffusive gradient in thin film (DGT) technique
Gregušová, Michaela ; Dočekal, Bohumil
In this study, characteristics of heavy metal contamination in road dust collected from urban area with heavy traffic in Brno, Czech Republic was investigated. The DGT probes were exposed in aqueous suspensions of particulate matter for different time periods to monitor responses of the sample matter. The road dust and DGT sorption gels were decomposed by microwave assisted extraction and analyzed by inductively coupled plasma mass spectrometry for estimation of trace metals contents. The results revealed that the traffic appears to be responsible for the high levels of Cu, Pb, Ni and Sb and also that DGT technique, as alternative to conventional extraction procedures is a useful tool for characterization of metals mobility.
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