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Variation of isotopic composition in selected natural and archeological samples, methodical approach
Venhauerová, Petra ; Trubač, Jakub (advisor) ; Magna, Tomáš (referee)
This thesis is focused on elaboration of the methodical approaches for determination silver isotope ratios by multicollector inductively coupled plasma mass spectrometry (MC-ICP- MS) from Centrum of stable and radiogenic isotopes on Science Faculty on Charles University. Therefore, this thesis describes in detail methodology of chromatographic separation and conditions of further measurement. For analysis of isotopic ratios 107 Ag/109 Ag in individual samples are used natural samples of various silver and gold deposits in Czech Republic and Poland. Also, archeological findings of fractures of silver coins from our country. The aim of this work is to find out if there is a variability among this two types of samples. Measured values are further correlated with already published works specialized on similar types of natural and archeological samples. The obtained values could be used for an interpretation of geological processes (e. g. physicochemical fractionation during ore forming processes) or as an identification source of the origin of coins and other archeological findings (e. g. silver ornaments). Gained knowledge of this work will help improve contemporary methodology in measurement of silver isotopes, such as standard calibration and tuning the stability of a signal. Key words: isotopes of...

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