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National Repository of Grey Literature

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Comparison of various approaches to determination of antimony by atomic fluorescence spectrometry Adámková, Dominika ; Červený, Václav (advisor) ; Hraníček, Jakub (referee) Bakalářská práce se zabývá porovnáním tří způsobů generování těkavých sloučenin pro stanovení antimonitých a antimoničných iontů pomocí atomové fluorescenční spektrometrie. Pro porovnání jednotlivých stanovení byly vždy nejprve nalezeny nejvhodnější experimentální podmínky. Protože je chemické generování považováno za nejúčinnější v porovnání s ostatními typy generování a je také nejčastěji používáno, bylo charakterizováno jako první. Bylo dosaženo limitu detekce 0,12 ppb pro Sb3+ a 0,28 ppb pro Sb5+ . Ovšem nejvyšší citlivosti a nejnižšího limitu detekce bylo dosaženo pro elektrochemické generování hydridu antimonu. Metoda EcHG byla přibližně 4×citlivější než technika CHG. Dosaženo bylo limitu detekce 9 ppt pro Sb3+ a 45 ppt pro Sb5+ . Nejnižší citlivost byla získána podle předpokladu při UV - fotochemickém generování, a to přibližně 9×nižší oproti elektrochemickému generování. Celkově stanovení antimonitých iontů bylo nejméně 4×citlivější než stanovení antimoničných iontů. Podle tvaru píku usuzuji, že tvorba těkavé sloučeniny probíhala u všech způsobů generování v případě Sb5+ pomaleji než u Sb3+ . Klíčová slova Atomová fluorescenční spektrometrie, antimon, generování těkavých sloučenin, chemické generování těkavých sloučenin, UV - fotochemické generování těkavých sloučenin, elektrochemické... Detailed record

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