Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Organolead"”.
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Organolead Compounds in Natural Systems
Most organolead compounds with alkyl groups attached to a central lead atom are many times more toxic than inorganic lead compounds. The widespread use of tetraethyllead and tetramethyllead as antiknock agents in gasoline, and consequently their emission or discharge into the environment, is …
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Reactions of Organolead Compounds Under Natural Conditions
… available on the concentration and properties of organolead compounds in the environment, and the information which is available is concerned mainly with the concentration of tetra-alkyl lead compounds in the atmosphere. This dissertation seeks to establish the fate of organolead compounds washed …
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Biogeochemistry of Organotin and Organolead compounds in a Forested Catchment in NE-Bavaria, Germany
Organotin-compunds (OTC) and Trimethyllead (TML) have a higher toxicity than their corresponding inorganic forms and may affect the functioning of ecosystems. Little is known about their behaviour and fate in the terrestrial environment. The goal of this thesis was to investigate the …
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Interfacing High Performance Liquid Chromatography with Inductively Coupled Plasma Mass Spectrometry for Speciation Studies
… been used for the speciation of organotin and organolead compounds in environmental samples, and to investigate the speciation of metals in tea liquors. It was found that although the apparatus proved beneficial for both the determination of organotins and the identification of metal containing …
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A Study of Lead Alkylation in Natural Systems
… solution, with lead metal or its salts to yield organolead compounds. Although aquatic organisms are known to concentrate alkyllead compounds, it is suggested that the environmental methylation processes outlined here do not present a danger to public health.
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Environmental speciation of tin and lead by HPLC-ICP-MS
… developed for the determination of organotin and organolead compounds in environmental samples. Several high performance liquid chromatographic separations of organotin compounds have been tested and the best system (cation-exchange chromatography with methanol and a citrate buffer) employed for …
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Field sampling and flow injection strategies for trace analysis and element speciation.
… to confirm a transmethyllation reaction between organolead and inorganic mercury.A further application for microcolumns, in the context of speciation measurement, is their use as external calibrants and certified reference materials (CRMs) and this is discussed in the penultimate chapter. Key …
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AN INVESTIGATION OF THE FEASIBILITY OF BIOMETHYLATION FOR GROUP IV METALS AND COMPOUNDS
… industrial use in recent years. Use of lead and organolead chemicals has declined but tin and organotin chemicals production has been increasing. Their methyl derivatives are of comparable toxicity but long terra toxicological studies for tin do not exist. Possible methylation of trimethyllead …
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Vapour-based growth of inorganic compounds for next-generation, stable photovoltaics
… are achieved. Incorporation into p-i-n organolead halide perovskite devices gives a champion efficiency of 16.6 %, which is comparable to the best devices using solution- and vacuum- based NiOx processing techniques. An annealing strategy to reduce the defect concentration in NiOx films …