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Determination of bismuth using chemical generation volatile compounds technique with AAS detection
Petreňová, Štěpánka ; Hraníček, Jakub (advisor) ; Rychlovský, Petr (referee)
EN This bachelor thesis is focused on the optimization method of determination of bismuth using chemical generation volatile compound coupled with AAS detection with quartz tube. As a part of this task carrier gas flow rate, the flow rate of working solutions, the concentration of the working solution and the temperature of the atomizer were optimized. After this, the calibration dependence was measured for samples of bismuth in hydrochloric acid and samples of bismuth in deionized water and the basic characteristics of the methods were established. Last part of this thesis was aimed to study of different interfering elements and compounds such as arsenic, lead, copper, iron, sodium, calcium, sulphate and chloride. Key words Chemical generation, atomic absorption spectrometry, bismuth, flow injection analysis, interferences
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Arsenic speciation analysis by hydride generation - cryotrapping - gas chromatography - atomic absorption spectrometry
Petreňová, Štěpánka ; Svoboda, Milan (advisor) ; Šucmanová, Marcela (referee)
EN The thesis is focused on a speciation analysis of arsenic with use of the hydride generation - cryotrapping - gas chromatography - atomic absorption spectrometry. The aim of this project was the development of a method and instrumentation of the speciation analysis of arsenic based on combination of selective generation of substituted hydrides with a detection by atomic absorption spectrometry and with use of the cryotrapping of generated arsenic species and their separation by the gas chromatography. In the first part of this work the effects of individual parameters which influence the separation in the gas chromatograph were studied. Especially, time of injection from the cryotrap into GC, temperature program, carrier gas flow and carrier gas flow through a "deanswitch". Optimization of these parameters is an attempt to achieve a satisfactory resolution of the individual peaks of arsenic species separated by gas chromatography. Furthermore, an adequate sensitivity of this method is required to be achieved in comparison to other methods that use AAS detection such as a combination of hydride generation with cryotrapping. For this reason, the detection limits and the quantification of arsenic species were important to be determined as well. A sampling coil was replaced by a sampling tip...
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Determination of bismuth using chemical generation volatile compounds technique with AAS detection
Petreňová, Štěpánka ; Hraníček, Jakub (advisor) ; Rychlovský, Petr (referee)
EN This bachelor thesis is focused on the optimization method of determination of bismuth using chemical generation volatile compound coupled with AAS detection with quartz tube. As a part of this task carrier gas flow rate, the flow rate of working solutions, the concentration of the working solution and the temperature of the atomizer were optimized. After this, the calibration dependence was measured for samples of bismuth in hydrochloric acid and samples of bismuth in deionized water and the basic characteristics of the methods were established. Last part of this thesis was aimed to study of different interfering elements and compounds such as arsenic, lead, copper, iron, sodium, calcium, sulphate and chloride. Key words Chemical generation, atomic absorption spectrometry, bismuth, flow injection analysis, interferences
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