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Determination of the chemical composition of a brass sample by X-ray fluorescence method
Tomanová, Michaela ; Čudek, Pavel (referee) ; Vaněk, Jiří (advisor)
The fluorescence spectroscopy method is used to distinguish components in gas, liquid, or solid samples. The study is based on the parameters of secondary radiation, which is emitted by each element and allows them to be identified. The distinction between each radiation is analogous to a fingerprint. Apart from quantitative and qualitative analyses, the method can be used to determine the thickness of metal layers and alloys. Laboratory analysis has a broader range of application than portable devices, which are also available. In the laboratory, two methods of measurement are available: wavelength dispersive fluorescence spectroscopy – WDXRF and energo dispersive fluorescence spectroscopy – EDXRF. A brass sample with lead additive was analyzed using EDXRF in the practical part of this diploma thesis. An X-ray apparatus from the Leybold company was employed for the analysis, which will be used for education of lower grades at the university. A measurement station and a laboratory assignment were developed as part of the thesis, the aim of which will be to determine the chemical composition of a brass sample using the X-ray fluorescence method.
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Determination of the chemical composition of a brass sample by X-ray fluorescence method
Tomanová, Michaela ; Čudek, Pavel (referee) ; Vaněk, Jiří (advisor)
The fluorescence spectroscopy method is used to distinguish components in gas, liquid, or solid samples. The study is based on the parameters of secondary radiation, which is emitted by each element and allows them to be identified. The distinction between each radiation is analogous to a fingerprint. Apart from quantitative and qualitative analyses, the method can be used to determine the thickness of metal layers and alloys. Laboratory analysis has a broader range of application than portable devices, which are also available. In the laboratory, two methods of measurement are available: wavelength dispersive fluorescence spectroscopy – WDXRF and energo dispersive fluorescence spectroscopy – EDXRF. A brass sample with lead additive was analyzed using EDXRF in the practical part of this diploma thesis. An X-ray apparatus from the Leybold company was employed for the analysis, which will be used for education of lower grades at the university. A measurement station and a laboratory assignment were developed as part of the thesis, the aim of which will be to determine the chemical composition of a brass sample using the X-ray fluorescence method.
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Měření obsahu hliníku v potravinářkých obalech
Vopálenská, Ludmila
The diploma thesis deals with aluminum food packaging. At first was made a literature recherche relating to this subject. In the next part was realized market analysis of food products, in which is usually used aluminum or aluminum composite in the Czech Republic. After the market analysis we were measuring the samples. We choosed dairy products packaging, for example packaging of the yoghurt (different sizes), the packaging from a curd, from a blue cheese and thermized cheese (Lučina). In selected types of dairy products packaging was set qualitative weight distribution of aluminum-containing composite materials and with the X-ray fluorescence spectrometry was made the qualitative measurement of the aluminum content in these obtained samples. The aluminium content in the metal parts of my samples was between 46,9% and 99,1%.
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Analýza prvkového složení vybraného elektroodpadu
Polická, Jana
This diploma thesis is focused on the issue of Analysis of the elemental composition of selected electrical waste (Waste Electrical and Electronic Equipment). The main goal is to determine amount of rare metals contained in central processing unit (CPU). The literature search was formed from available literature with the purpose to characterize the legislative framework for waste electrical and electronic equipment and the issue of collection of the selected e-waste in the European Union, particularly in the Czech Republic. In the practical part was analyzed selected samples of central processing units produced in 2000-2009. With the help of X-ray fluorescence spectrometry method was found to vary the amount of each element during the development of these units. Based on the results of completed survey we can conclude that the investigated samples con-tain economically usable elements. In the conclusion was evaluated the method which was used to determine the elemental composition and results was compared with other authors. This serves to see whether rare metals of processor that could be potentially economically exploited.
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