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Identifier uch.chemistry.msc//2006chryssou
Title Ανάπτυξη μεθόδων φασματομετρίας μάζας επαγωγικά συζευγμένου πλάσματος (ICP-MS) για τον προσδιορισμό και την ειδοταυτοποίηση του αντιμονίου σε υδατικά περιβαλλοντικά δείγματα
Alternative Title High performance liquid chromatography-hydride generation-inductively coupled plasma-mass spectrometry detection for the determination of antimony in water samples
Creator Chryssou, Andromachi
Abstract Antimony (Sb) is present at relative low levels in unpolluted seawater (less than 1μg l-1). Its appearance in seawater is due to weathering of rocks and related soil runoff, runoff from mining or smelting areas, or local emission from for instance power-stations. Hence, local hot-spots with elevated Sb concentrations may occur in seawater. In small doses, Sb causes headache, dizziness and depression. Larger doses cause violent and frequent vomiting, and may lead to death in few days. In this study we have developed two ultra sensitive analytical methods for the determination of Sb in seawater using inductively coupled mass spectrometry (ICP-MS) detection. Seawater comprises a complex matrix for analysis by ICP-MS due to its high salt and chloride content. By introducing a hydride generation (HG) system prior to the ICP-MS, suppression of signals due to the complex matrix of the seawater samples was overcome. The limit of detection for Sb and Sb(V), Sb(III) were 0.006 μg/l, 0.013 μg/l and 0.005 μg/l respectively and the optimum conditions are presented. As the geo-chemistry, bio-chemistry and toxicity of Sb are very species specific, methods were developed for the speciation of Sb. High performance liquid chromatography (HPLC) was coupled to the HG-ICP-MS and the conditions were optimized for the separation of Sb-species using a strong anion-exchange column (Hamilton PRP-X100). For separation of antimony species (Sb(V)/Sb(III)) a complexating agent (ethylenediaminetetraacetic acid (EDTA)) was used in the mobile phase. Data for quality assurance will be presented together with results of measurements on water samples collected around Greece.
Subject HG-ICP-MS,antimony,seawater
Issue date 2006-11-01
Date available 2007-05-08
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
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