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Dissertations / Theses on the topic 'Chromatographic Gas'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Prazen, Bryan J. "Development of high speed hyphenated chromatographic analyzers and second order data analysis techniques /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/11550.

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2

Michelsen, Peter J. "Relationship between chromatographic retention and donor and acceptor numbers /." Online version of thesis, 1990. http://hdl.handle.net/1850/10688.

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3

Ash, Peter William. "Studies of tin oxide gas sensors for gas chromatographic detection." Thesis, University of Plymouth, 1990. http://hdl.handle.net/10026.1/2066.

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Gas sensitive semiconductors have been known for many years and applied in static gas alarm systems for the monitoring of hazardous gases, however, their application has been limited by a lack of selectivity. In this work a semiconducting gas sensor has been configured for use as a gas chromatographic detector thus combining the sensitivity of semiconductor sensors with the selectivity of gas chromatography. The study has been confined to tin oxide devices, more specifically the Taguchi gas sensor (TGS) . The majority of this work has concentrated on the TGS 813 although the use of other TGS i

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4

McBrady, Adam Dewey. "Microfabricated chromatographic instrumentation for micro total analysis systems /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/8570.

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5

Prichodko, Aleksandra. "Microextraction and gas chromatographic determination of parabens." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090310-29342.

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Parabens are effective antibacterial and anti-fungal agents and are used extensively as preservatives in cosmetics, food and pharmaceutical products. Because of the presence of parabens in the environment and their negative effects on human health, there is an increasing interest in their trace analysis. Since the concentration of parabens in the environment are rather low and cosmetics present rather complex matrices for the analysis, it is necessary to apply a preconcentration or isolation step prior to the chromatographic analysis. The aim of this work was to develop liquid-phase microextra

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6

Al-Sayegh, A. J. "Determination of mixtures of sulfonamides by pyrolysis-gas chromatography following thin-layer chromatographic separation." Thesis, University of Kent, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379714.

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7

Silwal, Indira K. C. "Characterization of Unknown Chemicals Using Gas Chromatography/Fourier Transform Ion Cyclotron Resonance Mass Spectrometry and AB-Initio Calculations." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/SilwalIKC2008.pdf.

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8

Reiner, George Allen. "An explosive vapor generator based on capillary gas chromatography." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/39761.

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9

Rees, G. J. "Interfacial adsorption in a gas-liquid chromatographic system." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638636.

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Chromatographic retention due to adsorption at the liquid/gas and liquid/solid interfaces is possible in gas-liquid chromatographic (GLC) systems, especially with polar solutes from a non-polar stationary phase. The variation of retention volumes with sample size at 60<SUP>o</SUP>C on several series of columns, using different support materials, was studied for di iso-propyl ether (DIPE), a polar solute, on squalane, a non-polar stationary phase. Isolation of the total adsorption contributions to retention was then performed using a semi-empirical curve fitting procedure devised by Mathiasson

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10

Christofides, A. "Pyrolysis gas chromatographic analysis of quaternary ammonium compounds." Thesis, Cardiff University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304009.

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11

Johnson, Kevin J. "Strategies for chemometric analysis of gas chromatographic data /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/8513.

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12

Mangel, Astrid. "Gas adsorption and neutron scattering studies of chromatographic supports." Thesis, University of Exeter, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239391.

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13

Chihara, Kazuyuki, Yosuke Kaneko, Takuya Terakado, and Hisashi Mizuochi. "Diffusion in multicomponent gas adsorption on MSC5A, chromatographic study." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194787.

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14

Chihara, Kazuyuki, Yosuke Kaneko, Takuya Terakado, and Hisashi Mizuochi. "Diffusion in multicomponent gas adsorption on MSC5A, chromatographic study." Diffusion fundamentals 3 (2015) 16, S. 1-4, 2005. https://ul.qucosa.de/id/qucosa%3A14304.

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15

Chihara, Kazuyuki, Hidenori Nakamura, and Yosuke Kaneko. "Diffusion study of multi-component gas adsorption in MSC5A by chromatographic method: Diffusion study of multi-component gas adsorption in MSC5Aby chromatographic method." Diffusion fundamentals 6 (2007) 57, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14236.

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16

Foster, Austin Richard. "Thermal Gradient Characterization and Control in Micro-Fabricated Gas Chromatography Systems." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7481.

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In order to make gas chromatography (GC) more widely accessible, considerable effort has been made in developing miniaturized GC systems. Thermal gradient gas chromatograpy (TGGC), one of the heating methods used in GC, has recieved attention over the years due to it's ability to enhance analyte focusing. The present work seeks to develop high performance miniaturized GC systems by combining miniaturized GC technology with thermal gradient control methods, creating miniaturized thermal gradient gas chromatography (µTGGC) systems. To aid in this development a thermal control system was develope

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17

Chappell, Colin Graham. "Multidimensional liquid and gas chromatographic methods for veterinary drug analysis." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357971.

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18

Huang, Degui. "Development of a capacitively coupled plasma as a gas chromatographic detector." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29879.

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This work has two objectives: first, to develop an atmospheric pressure radio frequency capacitively coupled plasma (CCP) as a detector for gas chromatography (GC) and, secondly, to understand the excitation process in the CCP from a fundamental point of view. In the process of developing the CCP as a gas chromatographic detector, the design of a CCP torch useful as an atomic emission detector for GC has involved several stages of evolution. Initially, two plasma torches, a cylindrical one with concentric electrodes and a rectangular one with two parallel electrodes, were designed and their p

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19

Chihara, Kazuyuki, Hidenori Nakamura, Yuki Teramura, and Yousuke Kaneko. "Study of multi-component gas adsorption by chromatographic method and simulation." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189459.

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20

Chihara, Kazuyuki, Hidenori Nakamura, Yuki Teramura, and Yousuke Kaneko. "Study of multi-component gas adsorption by chromatographic method and simulation." Diffusion fundamentals 11 (2009) 23, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A13962.

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21

Shagena, Elizabeth C. "Comparison of packed and wide-bore, open-tubular gas chromatographic columns." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45896.

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<p>Wide-bore, fused-silica capillary columns can be an excellent replacement for packed columns in many cases. They can provide higher surface inertness and thermal stability, as well as higher efficiency or speed of analysis. Wide-bore, open-tubular (WBOT) columns with thick films have higher sample capacities than conventional narrow-bore capillary columns and can be used in unmodified packed-column gas chromatographs.</p><p> The majority of gas chromatographic analyses are still performed using packed columns. Many chromatographers associate open-tubular columns exclusively with sp

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22

Kubiszewski, Jolanta. "Deconvolution of overlapped gas chromatographic peaks with EXCEL : application to three component mixtures /." View abstract, 1998. http://library.ctstateu.edu/ccsu%5Ftheses/1530.html.

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Thesis (M.S.)--Central Connecticut State University, 1998.<br>Thesis advisor: James V. Arena. " ... in partial fulfillment of the requirements for the degree of Master of Science in Chemistry." Includes bibliographical references (leaf 29).

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23

Lin, Zhong-Ping. "Gas-phase luminescence of aromatic carbonyl compounds and the design and use of a gas chromatographic detector." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ36559.pdf.

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24

Kouremenos, Konstantinos A., Mikael Johansson, and Philip J. Marriott. "Advances in gas chromatographic methods for the identification of biomarkers in cancer." Umeå universitet, Institutionen för molekylärbiologi (Medicinska fakulteten), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-61275.

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Screening complex biological specimens such as exhaled air, tissue, blood and urine to identify biomarkers in different forms of cancer has become increasingly popular over the last decade, mainly due to new instruments and improved bioinformatics. However, despite some progress, the identification of biomarkers has shown to be a difficult task with few new biomarkers (excluding recent genetic markers) being considered for introduction to clinical analysis. This review describes recent advances in gas chromatographic methods for the identification of biomarkers in the detection, diagnosis and

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25

Chihara, Kazuyuki, Hidenori Nakamura, and Yosuke Kaneko. "Diffusion study of multi-component gas adsorption in MSC5A by chromatographic method." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193932.

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26

Humphrey, Julie L. "The separation and characterisation of sorbitan esters using gas and liquid chromatographic techniques." Thesis, University of Hull, 2007. http://hydra.hull.ac.uk/resources/hull:1600.

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The aim of the work carried out was to develop an analytical method for characterising sorbitan ester surfactants, which could be used to monitor their manufacture and establish structure activity relationships. HPLC was the first analytical technique used, however despite evaluating various stationary and mobile phases a repeatable method could not be found. High temperature GC with splitless injection was then tried. A range of single polyol esters of varying fatty acid chain lengths were prepared and analysed to establish the ester species that would elute from the column. Using optimised c

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27

Pierce, Karisa M. "Objectively obtaining information from gas chromatographic separations of complex samples using novel data processing and chemometric techniques /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8575.

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28

Smith, Ian Derek. "Gas chromatographic studies into the stereoselective interactions of a modified cyclodextrin with enantiomeric substances." Thesis, Birkbeck (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287877.

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29

Cozzani, Enrico <1977&gt. "Modeling, design and experimental characterization of Micro-Electro-Mechanical-Systems for gas chromatographic applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3669/1/cozzani_enrico_tesi.pdf.

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Design parameters, process flows, electro-thermal-fluidic simulations and experimental characterizations of Micro-Electro-Mechanical-Systems (MEMS) suited for gas-chromatographic (GC) applications are presented and thoroughly described in this thesis, whose topic belongs to the research activities the Institute for Microelectronics and Microsystems (IMM)-Bologna is involved since several years, i.e. the development of micro-systems for chemical analysis, based on silicon micro-machining techniques and able to perform analysis of complex gaseous mixtures, especially in the field of environmenta

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30

Cozzani, Enrico <1977&gt. "Modeling, design and experimental characterization of Micro-Electro-Mechanical-Systems for gas chromatographic applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3669/.

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Design parameters, process flows, electro-thermal-fluidic simulations and experimental characterizations of Micro-Electro-Mechanical-Systems (MEMS) suited for gas-chromatographic (GC) applications are presented and thoroughly described in this thesis, whose topic belongs to the research activities the Institute for Microelectronics and Microsystems (IMM)-Bologna is involved since several years, i.e. the development of micro-systems for chemical analysis, based on silicon micro-machining techniques and able to perform analysis of complex gaseous mixtures, especially in the field of environmenta

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31

Hernandez, Baez Diana Margarita. "Establishing the maximum carbon number for reliable quantitative gas chromatographic analysis of heavy ends hydrocarbons." Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2674.

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This Thesis investigates the two main limitations of high temperature gas chromatography (HTGC) in the analysis of heavy n-alkanes: pyrolysis inside the GC column and incomplete elution. The former is studied by developing and reducing a radical pyrolysis model (7055 reactions) into a molecular pyrolysis model (127 reactions) capable of predicting low conversions of (nC14H30-nC80H162) at temperatures up to 430°C. Validation of predicted conversion with literature data for nC14H30, nC16H34 and nC25H52 yielded an error lower than 5.4%. The latter is addressed by developing an analytical model wh

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32

Levkin, Pavel. "Practice and theory of gas chromatographic enantioseparation on single- and binary-selector chiral stationary phases." [S.l. : s.n.], 2007.

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33

Trigg, Sheena-Ann. "Development of gas and liquid chromatographic methods for the separation and quantification of 11 cannabinoids." Thesis, Trigg, Sheena-Ann (2017) Development of gas and liquid chromatographic methods for the separation and quantification of 11 cannabinoids. Honours thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/40074/.

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New research into the medicinal properties of compounds within Cannabis is changing the way this convert plant material is used, both in Western Australia and around the world. The abuse of Cannabis as an illicit and recreational drug has been the focus of research for many decades, however this focus is shifting towards potential therapeutic benefits, such as pain relief and anti-seizure applications. Cannabis contains many compounds of pharmacological relevance, but the group of most interest is the cannabinoids. These include the main psychoactive component of Cannabis, Δ 9 tetrahydrocannab

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34

Mitheo, Yannick K. "Determination of Solute Descriptors for Illicit Drugs Using Gas Chromatographic Retention Data and Abraham Solvation Model." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804935/.

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In this experiment, more than one hundred volatile organic compounds were analyzed with the gas chromatograph. Six capillary columns ZB wax plus, ZB 35, TR1MS, TR5, TG5MS and TG1301MS with different polarities have been used for separation of compounds and illicit drugs. The Abraham solvation model has five solute descriptors. The solute descriptors are E, S, A, B, L (or V). Based on the six stationary phases, six equations were constructed as a training set for each of the six columns. The six equations served to calculate the solute descriptors for a set of illicit drugs. Drugs studied are

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35

Thigpen, Ashley Lauren Clark C. Randall. "Chromatographic and mass spectral studies on mass equivalent substituted phenethlamines related to MDEA, MDMMA and MBDB." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Theses/THIGPEN_ASHLEY_11.pdf.

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36

Tollbäck, Petter. "Large Volume Injection and Hyphenated Techniques for Gas Chromatographic Determination of PBDEs and Carbazoles in Air." Doctoral thesis, Stockholm University, Department of Analytical Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-367.

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<p>This thesis is based on studies in which the suitability of various gas chromatography (GC) injection techniques was examined for the determination of polybrominated diphenyl ethers (PBDEs) and carbazoles, two groups of compounds that are thermally labile and/or have high boiling-points. For such substances, it is essential to introduce the samples into the GC system in an appropriate way to avoid degradation and other potential problems. In addition, different types of gas chromatographic column system and mass spectrometric detectors were evaluated for the determination of PBDEs.</p><p>Co

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37

Tollbäck, Petter. "Large volume injection and hyphenated techniques for gas chromatographic determination of PBDEs and carbazoles in air /." Stockholm : Department of Analytical Chemistry, Stockholm University, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-367.

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38

Zapata, Angela Maria. "Development and performance enhancement of a capillary microwave induced plasma mass spectrometer for gas chromatographic detection /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2000.

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Thesis (Ph.D.)--Tufts University, 2000.<br>Adviser: Albert Robbat, Jr. Submitted to the Dept. of Chemistry. Includes bibliographical references (leaves 71-75). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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39

PAWLECKI-VONDERHEIDE, ANNE MARIE. "ELEMENTAL SPECIATION BY CHROMATOGRAPHIC SEPARATIONS INTERFACED TO INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1054751575.

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40

Lamoureux, Burton Richard. "Charge injection device array detection for atomic spectroscopy with applications in gas chromatography." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185261.

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Very early in the history of atomic emission spectroscopy (AES) it was understood to be a powerful analytical tool. Until the 1930's the usefulness of atomic spectroscopy was not utilized very extensively even though its fundamental power was understood. The breakthrough that placed it in the standard chemistry laboratory was the discovery and implementation of the photoelectric effect. Since this discovery there has been a revolution in atomic spectroscopy which has brought it from the role of a humble servant used for primary elemental screening to an outstanding leader in applications of el

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41

Datta, Seema. "Computer-aided technique for blending wine : application of simplex optimization to headspace gas chromatographic profiles of wine." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/28972.

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An objective method to blend wines for standardizing flavor quality was developed. Aroma volatiles of varietal and white stock wines were analyzed at 6°C and 37°C by headspace gas chromatography with cryofocussing. Pattern similarity constants of the chromatographic profiles were entered into the simplex optimization program which determined the best blending ratios of wines to simulate the target wine. Thirteen and 23 vertices were required to give the optimum response for trials 1 and 2, respectively. For both trials the computer optimized blends could not be differentiated from the target w

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42

Kalluri, Usha. "Gas chromatographic-mass spectrometry analysis of volatile organic compounds from cancer cell cultures - The effect of hypoxia." Thesis, Federation University Australia, 2018. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/166534.

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Early diagnosis of lung cancer improves patient outcomes which has led to a search for non-invasive diagnostic tests suitable for population screening. Volatile organic compounds (VOCs) in exhaled breath have shown potential, however, confirmation of the metabolic origins and disease specificity of candidate markers is required. Cell culture metabolomics can identify disease biomarkers and their origins. To date VOC profiles from in vitro cultured cancer cells have little similarity to cancer breath VOC profiles. In vivo, cancer cells experience hypoxia whereas in vitro cells are cultured unde

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43

Venter, Andre. "Comprehensive two-dimensional supercritical fluid and gas chromatography (SFCxGC)." Thesis, Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-03132003-161136.

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44

Jiang, Chengliang. "Germania-based Sol-gel Coatings and Core-shell Particles in Chromatographic Separations." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7683.

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Chapter one reviewed the development of sol-gel stationary phase for gas chromatograph (GC). Inorganic sol-gel precursor creates the substrate support for stationary phase bind to silica surface through the condensation of silanol groups, the rough surface with enhanced surface area enlarger the capacity of the sol-gel stationary phase, the porosity of sol-gel structure decreases the mass transferring coefficient, the term C in Van Deemter equation, which makes sol-gel stationary phase thicker coating up to 1 um but keeps the high resolution for gas chromatography. Chemical bound stationary ph

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45

Bi, Maohua. "The potential of solid phase microextraction (spme) for the recovery of explosives followed by gas and liquid chromatographic analysis." FIU Digital Commons, 1998. http://digitalcommons.fiu.edu/etd/1647.

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The potential of solid phase microextraction (SPME) in the analysis of explosives is demonstrated. A sensitive, rapid, solventless and inexpensive method for the analysis of explosives and explosive odors from solid and liquid samples has been optimized using SPME followed by HPLC and GC/ECD. SPME involves the extraction of the organic components in debris samples into sorbent-coated silica fibers, which can be transferred directly to the injector of a gas chromatograph. SPME/HPLC requires a special desorption apparatus to elute the extracted analyte onto the column at high pressure. Re suits

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46

Zethelius, Thea. "Development of headspace solid phase microextraction gas chromatography mass spectrometry method for analysis of volatile organic compounds in board samples : Correlation study between chromatographic data and flavor properties." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84941.

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The purpose of this thesis work was to develop a headspace solid phase microextraction gas chromatography mass spectrometry (HS-SPME-GC-MS) method to detect volatile organic compounds (VOCs) in board samples and to statistically investigate potential correlation between chromatographic data and flavor data obtained from a trained panel. The developed method would hopefully serve as a complement to the already established routine analyses at Stora Enso and gain an increased understanding of which VOCs in the board influence its flavor properties. The impact of incubation time and adsorption tim

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47

Burian, Cosmin. "Improvement of ms based e-nose performances by incorporation of chromatographic retention time as a new data dimension." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/8482.

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Mejora del rendimiento de la nariz electrónica basada en espectrometría de masas mediante la incorporación del tiempo de retención cromatografico como una nueva dimensión de datos<br/><br/>La importancia del sentido de olor en la naturaleza y en la sociedad humana queda latente con el gran interés que se muestra en el análisis del olor y el gusto en la industria alimentaria. Aunque las aéreas mas interesadas son las de la alimentación y bebida, también se ha mostrado la necesitad para esta tecnología en otros campos como en el de la cosmética. Lamentablemente, el uso de los paneles sensoriales

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48

Ogden, Michael Wayne. "Deactivation and preparation of fused silica open tubular columns for gas and supercritical fluid chromatography." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/76470.

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The activity and wettability of raw fused silica capillary tubing was found to be widely variable which places severe limitations on the reproducibility of column deactivation and inertness. Hydrothermal treatment of the raw fused silica with nitric acid was proven to be very effective for cleaning and maximizing the degree of silanol coverage of the surface. The capillary rise method was used to obtain contact angle data for untreated fused silica and fused silica treated with a variety of deactivating reagents. This contact angle data was used in the construction of Zisman plots which allowe

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49

Wood, Jennifer. "A study of the development of the adrenal gland in very low birthweight babies by gas chromatographic analysis of urinary steroid profiles." Thesis, The University of Sydney, 1995. https://hdl.handle.net/2123/26836.

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The adrenal development in a group of very low birthweight (VLBW) neonates was studied over the first few months of life by using gas chromatographic and gas chromatographic-mass spectrometric urinary steroid profiling. The extraction method used was developed for use on neonatal urine which contains several unique and highly polar steroids. At birth two zones are present in the human adrenal cortex, an inner zone (the fetal adrenal zone), and an outer zone (the definitive adrenal cortex). Postnatally, over the first few months the fetal zone involutes, leaving the definitive zone which pr

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50

Kawabe, Iwao, Yukiko Nagaoka, Tomio Harada, Atsushi Sawada, and Tetsuo Minagawa. "On the CO_2-bubbling extraction of dissolved He, Ne, H_2, Ar, N_2 and CH_4 in waters for their gas chromatographic determinations." Dept. of Earth and Planetary Sciences, Nagoya University, 1996. http://hdl.handle.net/2237/2828.

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