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Elimination of Electrochemical Oxidation during Sample Ionization Using Liquid Sample Desorption Electrospray Ionization (DESI)Almowalad, Najah K., January 2016 (has links)
No description available.
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Development of atmospheric pressure ionization techniques for mass spectrometry of biomolecules. / CUHK electronic theses & dissertations collectionJanuary 2013 (has links)
Yeung, Hoi Sze. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 120-134). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts also in Chinese.
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ESI/MS studies of fragmentation of metallated phthalocyanines /Hashemi, Sara. January 2007 (has links)
Thesis (M.Sc.)--York University, 2007. Graduate Programme in Chemistry. / Typescript. Includes bibliographical references (leaves 71-75). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38780
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A novel tip design for electrospray mass spectrometry at nanoliter flowrate. / CUHK electronic theses & dissertations collectionJanuary 2001 (has links)
Fong Wai-Yin Karen. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2001 / Includes bibliographical references (p. 173-181). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
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Mass spectrometric analysis of the reactivity of trityl cationWei, Alan An Jung 29 April 2019 (has links)
Ever since its accidental discovery in the 70s, methylaluminoxane, MAO, has been a popular and widely used activator in olefin polymerization. Hydrolysis of primethylaluminum, Me3Al, produces MAO, an aluminum-, oxygen-, and methyl-containing oligomer. Polyolefins have become one of the most produced polymers, where MAO-activated single-site catalysts are responsible for the synthesis of polymers with highly defined structures.
The detailed structure of MAO however, remains a mystery. In order to thoroughly understand the reactivity of MAO, knowing more about it is essential. Electrospray ionization mass spectrometry (ESI-MS) has proven to be a useful technique for studying catalysts and their activation chemistry. It has been shown that MAO is best thought of as a source for the highly reactive and Lewis acidic dimethylaluminum cation, [Me2Al]+. Synthetically, this ion is accessible via the reaction between trityl tetrakis(pentafluorophenyl)borate, [Ph3C]+[B(C6F5)4]- and trimethylaluminum, and this reaction was investigated in detail. A new reaction, substitution of H for CH3 onto the phenyl ring of the trityl carbocation, [Ph3C]+, was detected and found to be general for all trialkylaluminums studied.
All instruments with detectors are prone to signal saturation at high concentration and mass spectrometers are no exception. Despite the advantages that ESI-MS offers, saturation can be one of the main obstacles in terms of the accurate quantification of species.
This thesis tackles saturation issues in ESI-MS explicitly, because relatively high concentrations were necessary in order to keep unwanted decomposition reactions to a minimum. By detuning various parameters that allows troubleshooting this issue, data that better reflects the reality and the corresponding quantification of species is obtained. With the optimal settings of parameters, quantitative studies and the reactivity regarding the addition of trimethylaluminum, Me3Al, to the trityl carbocation [Ph3C]+ can be better understood. / Graduate
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Molecular characterisation of organic aerosols using soft ionisation mass spectrometryGallimore, Peter James January 2015 (has links)
No description available.
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Enhanced electrospray ionization for mass spectrometry and ion mobility spectrometry /Zhou, Li, January 2006 (has links) (PDF)
Thesis (Ph. D.)--Brigham Young University. Dept. of Chemistry and Biochemistry, 2006. / Includes bibliographical references.
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Studies of sub-micron sized electrospray droplets in mass spectrometry /Lasater, Matt Alan, January 2001 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2001. / Vita. Includes bibliographical references. Available also in a digital version from Dissertation Abstracts.
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Applications and fundamental characterization of open air and acoustic-driven ionization methodsHampton, Christina Young. January 2009 (has links)
Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2010. / Committee Chair: Fernandez, Facundo M.; Committee Member: Bottonley, Lawrence A.; Committee Member: Kelly, Wendy L.; Committee Member: Merrill, Alfred; Committee Member: Orlando, Thomas; Committee Member: Sullards, Cameron. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Biopolymer analysis by electrospray ionization and tandem mass spectrometryKeller, Karin Mia 28 August 2008 (has links)
Not available / text
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