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 9 of 9 for “"mass spectrometer (MS)"”.
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Degradation Product Analysis of Bismaleimide Composite
… The use of on-line gas cell fourier transform IR spectrometer (FTIR) and mass spectrometer (MS) allows for the identification of decomposition products by evolved gas analysis. This combination of thermogravimetric analysis (TGA) and evolved gas analysis by FTIR and MS yields complementary …
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A Study of On-line Analysis of Hydrogen Chloride Evolution During Coal Combustion
… interfaced with a fourier transform infrared spectrometer (FTIR) and a mass spectrometer (MS) to determine the evolution of hydrogen chloride from coal during combustion as a function of the chlorine content and mesh size of the coal. It was determined that combined TG-FTIR and TG-MS systems …
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Velocity-difference induced focusing in capillary electrophoresis and preparative capillary electrophoresis
… obtained by using a photodiode array (PDA) and mass spectrometer (MS) for peak identification. Comparisons were made between the PDA detection and MS detection for aromatic amino acids with V-DIF using a dynamic pH junction. This V-DIF technique was then applied to non-aromatic amino acids with …
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Spatial and temporal analysis of pharmaceutical concentrations and chitobiase activity in the Upper Tennessee River
… with an electrospray ionization, tandem mass spectrometer (MS/MS). This method yielded reproducible quantitation at the low parts per trillion (ng/L) level for all 14 analytes (acetaminophen, caffeine, carbamazepine, sulfamethoxazole, trimethoprim, ranitidine, ciprofloxacin, levofloxacin, …
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New Mass Spectrometry Approaches to Investigate Proteins and Protein Interactions
Mass spectrometry (MS) is essential for understanding the composition, structures, and interactions of proteins. There are various forms of MS that can be used to obtain valuable information about proteins and protein interactions. In native MS, intact protein ions are generated from a solution …
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Determination of nicotine and its metabolites by capillary electrophoresis and mass spectrometry.
… attractive separating device for coupling with a mass spectrometer (MS). The overall aims of this work were to produce a sensitive, highly selective, and simple CE-sample stacking/MS assay for the measurement of nicotine and its metabolites in urine, to develop a highly sensitive transient …
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Dynamics and Kinetics of Singlet Oxygen Mediated Oxidation of Methionine in the Gas Phase, Hydrated Clusters and Solution
… ionization (ESI) guided-ion-beam tandem mass spectrometer (MS). The study started from probing the reaction dynamics between the isolated protonated/deprotonated methionine ions with <sup>1</sup>O<sub>2</sub> in the gas phase, transited through the same systems micro-solvated with …
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Micrometer-scale chemical analysis using heated AFM cantilever and mass spectrometer
… atomic force microscope(AFM) cantilever and mass spectrometer. Simulations investigate the underlying transport mechanisms within the system and the impact of various design parameters. The way to optimize the system is suggested based on the simulation results. A heated microcantilever is …
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The preparation of porous microcolumn arrays of silicon, and post-ionization of neutral particles from DIOS-MS
… work to detect low molecular weight compounds by mass spectrometry. Post-ionization of neutral particles is a promising alternative technique for improving parent ion yields, particularly if gaseous neutrals can be ionized using a single photon ionization (SPI) source. In this thesis the high …