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91	Příspěvky ke generování těkavých sloučenin arsenu, stříbra a zlata pomocí reakce s tetrahydroboratem pro atomovou absorpční spektrometrii / Contributions to Volatile Compound Generation of Arsenic, Silver and Gold by Tetrahydroborate Reaction for Atomic Absorption Spectrometry Musil, Stanislav January 2011 (has links) (EN) The presented dissertation thesis summarizes the results contained in five original research papers that were published in prestigious international scientific journals in the field of analytical chemistry and atomic spectrometry. It is devoted to the method of generation of volatile compounds using a tetrahydroborate reaction and detection in a quartz multiatomizer by atomic absorption spectrometry. The thesis can be divided into two thematic parts - speciation analysis of arsenic based on hydride generation technique with collection and separation in a cryogenic trap and generation of volatile species of transition metals. In the first thematic part pre-reduction of pentavalent inorganic and methylated arsenicals has been studied. A simple setup for on-line pre-reduction employing thioglycolic acid as a fast pre-reductant has been developed, connected with a current hydride generator and applied/verified to oxidation state specific arsenic speciation analysis of human urine samples. In the same method the possibility of drying the gaseous phase from water vapor has been investigated to avoid incidental blocking the cryogenic trap by frozen water and to decrease fluctuations of signal baseline. Pronounced losses of methylated species have been discovered on Nafion tube dryer currently used in...
92	Syntheses and Electron Density Determination of Novel Polyimido Sulfur Ylides / Synthesen und Elektronendichtebestimmung an neuen Polyimido-Schwefelyliden Deuerlein, Stephan 31 October 2007 (has links) No description available. 540 Chemie Mathematics and Computer Science Schwefelylide Organolithiumchemie Ladungsdichte Bindung QTAIM ylidisch ylenisch Metallcomplexe Zinn Magnesium Arsen Schwefel Stickstoff Kohlenstoff Lithium Imide Januskopf-Ligand homobimetallische Komplexe Komplexchemie Polymorphie sulfur ylides organolithium chemistry charge density bonding QTAIM ylidic ylenic metal complexes tin magnesium arsenic sulfur nitrogen carbon lithium imides janus-head ligand homobimetallic complexes complex chemistry polymorphism 35.11 35.44 35.60 35.90 SP 000: Strukturchemie SOC 250: Metallkomplexe Chelate {Chemie: Verbindungstypen} STJ 250: Lithium {Anorganische Chemie} STO 270: Schwefeloxyde
93	To Make Iron of Iron : A Comprehensive Analytical Study of Spade Shaped Iron Bars Pappas Adlreburg, Nickolas January 2017 (has links) This thesis aims to provide adequate analytical information on the spade shaped iron bars of Norrland and central Sweden. While their significance has been thoroughly debated for decades, analytical research on them has been confined to cases of single artefacts or theoretical interpretations of their value, meaning and origin. In this study a comprehensive approach is taken into consideration. Based on X-Ray fluorescence (XRF), scanning electron microscopy (SEM) and metallographical analysis this thesis seeks to facilitate new interpretations on quality, production centres and usage based on analytical results. Aiming to settle some of the long lasting questions regarding the artefacts while producing results which can further the discussion by raising new questions, previously unasked. Archaeological Science Archaeometallurgy Spade Shaped Iron Bars X-Ray Fluorescence (XRF) Scanning Electron Microscopy (SEM) Metallography Swedish Archaeology Archaeology in Norrland Scandinavian Iron Age Nordic Iron Age Roman Iron Age Migration Period Vendel Period Prehistoric Metallurgy Slag Iron Bar Currency Bar Bloomery Bloom Iron Bog Iron Limonite Mineral Iron Ores Hematite Magnetite Phosphoric Iron/Steel Prehistoric Steel Ferrite Pearlite Nickel Cobalt Phosphorus Arsenic Magnesium Sulfur Manganese Norrland Middle Norrland Uppland Gästrikland Hälsingland Medelpad Jämtland Södermanland Helgö Torsåker Gåcksätter Alborga Offerdal Selånger Villberga Arbrå Laborativ Arkeologi Arkeometallurgi Spadformiga Ämnesjärn Röntgenfluorescens (XRF) Svepelektronmikroskop (SEM) Metallografi Svensk Arkeologi Norrländsk Arkeologi Förnnordisk Arkeologi Skandinavisk Järnålder Nordisk Järnålder Fornnordisk Järnålder Romersk Järnålder Folkvandringstiden Vendeltiden Forhistorisk Metallurgi Slaget Ämnesjärn Blästerugn Blästa Myrmalm Sjömalm Limonit Bergmalm Hematit Magnetit Fosforisk Järn/Stål Förhistorisk Stål Ferrit Pearlit Nickel Kobolt Fosfor Arsen Magnesium Svavel Mangan Norrland Mellannorrland Uppland Gästrikland Hälsingland Medelpad Jämtland Södermanland Helgö Torsåker Gåcksätter Alborga Offerdal Selånger Villberga Arbrå Archaeology Arkeologi

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