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National Repository of Grey Literature

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Determination of calcium in food supplements Hubčuková, Karmelita ; Hraníček, Jakub (advisor) ; Sobotníková, Jana (referee) Tato bakalářská práce byla zaměřena na stanovení vápníku ve vybraných potravinových doplňcích s využitím plamenové atomové absorpční spektrometrie. Nejdříve byla prováděna optimalizace podmínek s využitím plamene acetylen-vzduch a následně s využitím plamene acetylen-oxid dusný. Optimalizovanými parametry byla výška paprsku nad hranou hořáku, horizontální poloha hořáku, šířka absorpčního prostředí, průtoková rychlost acetylenu a oxidu dusného. Byla sestrojena kalibrační závislost stanovení vápenatých iontů a odpovídající meze detekce a stanovitelnosti. Následně byly vybrané vzorky potravinových doplňků několika způsoby převedeny do roztoku. Vyzkoušeno bylo rozpouštění v deionizované vodě, rozpouštění v koncentrované kyselině dusičné a rozklad pomocí mikrovlnného tlakového zařízení. Experimentálně bylo stanoveno množství vápníku v potravinových doplňcích, které bylo porovnáváno s údaji uvedenými od výrobce. Správnost měření byla ověřena analýzou referenčního materiálu. Detailed record

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