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Relevant bibliographies by topics / Gas chromatograph / Dissertations / Theses

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Dissertations / Theses on the topic 'Gas chromatograph'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Noh, Hongseok "Moses." "Parylene Microcolumn for Miniature Gas Chromatograph." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4983.

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This research contributes to worldwide efforts to miniaturize one of the most powerful and versatile analytical tools, gas chromatography (GC). If a rapid, sensitive and selective hand-held GC system is realized, it would have a wide range of applications in many industries and research areas. As a part of developing a hand-held GC system, this research focuses on the separation column, which is the most important component of a GC system. This thesis describes the development of a miniature separation column that has low thermal mass and an embedded heating element for rapid thermal cycling.

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2

Osgood, Eric S. "Transient gas chromatograph analysis of biomass synthesis gas produced in a lab scale gasifier." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2600.

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3

Skinner, Michael A. "Hapsite® gas chromatograph-mass spectrometer (GC/MS) variability assessment /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/Skinner2005.pdf.

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4

Paster, Eli (Eli Travis). "Development of a miniature, continuous measurement, stochastic perturbation gas chromatograph." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92167.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 150-154).<br>Gas chromatography is one of the most widely used analytical chemistry techniques for separating and analyzing chemical compounds. Chromatographic methods are used to identify constituent species within a compound and determine the purity and relative concentrations of those species. Current gas chromatographs are heavy, bench top instruments that require large capital expenditures, kilowatt power

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5

Velugula, Hemakumar. "Impact of a prescribed forest burn on ambient hydrocarbon levels in Louisiana." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1175713579.

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6

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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7

Koch, David R. "Field and laboratory application of a gas chromatograph low thermal mass resistively heated column system in detecting traditional and non-traditional chemical warfare agents using solid phase micro-extraction /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/Koch2005.pdf.

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8

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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9

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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10

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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11

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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12

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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13

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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14

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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15

Akbar, Muhammad. "Chip-Scale Gas Chromatography." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56566.

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Instrument miniaturization is led by the desire to perform rapid diagnosis in remote areas with high throughput and low cost. In addition, miniaturized instruments hold the promise of consuming small sample volumes and are thus less prone to cross-contamination. Gas chromatography (GC) is the leading analytical instrument for the analysis of volatile organic compounds (VOCs). Due to its wide-ranging applications, it has received great attention both from industrial sectors and scientific communities. Recently, numerous research efforts have benefited from the advancements in micro-electromecha

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16

GUEDES, Carolina Arruda. "Efeitos subletais de deltametrina sobre o chamamento, composição e eficiência do feromônio sexual de Neoleucinodes elegantalis (Guenée, 1854) (Lepdoptera: Crambidae)." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5958.

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Submitted by (edna.saturno@ufrpe.br) on 2016-11-23T14:42:31Z No. of bitstreams: 1 Carolina Arruda Guedes.pdf: 366977 bytes, checksum: f52564e3d9d50d467b48ca37e9fee5cc (MD5)<br>Made available in DSpace on 2016-11-23T14:42:31Z (GMT). No. of bitstreams: 1 Carolina Arruda Guedes.pdf: 366977 bytes, checksum: f52564e3d9d50d467b48ca37e9fee5cc (MD5) Previous issue date: 2012-07-02<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The culture of tomato, Lycopersicon esculentum Mill., is of great socio-economic relevance to the world. Neoleucinodes elegantalis Guenée, kno

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17

Al-Othmany, Dheya Shuja'a. "Tritium enrichment by gas chromatography." Thesis, University of Aberdeen, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240675.

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In the studies related to trace analysis in meteorology, hydrology, medical and clinical research, the measurement and monitoring of tritium released from nuclear facilities and its health physics aspects on human and the environment are of growing importance. The techniques employed currently for the enrichment of tritium are carried out using large samples and require long periods of operation (7 days or more) to obtain the enriched tritium sample. In the present investigation, a laboratory scale chromatography based system was designed, constructed and commissioned successfully to collect e

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18

McGill, Robert Andrew. "Physicochemical measurements by gas chromatography." Thesis, University of Surrey, 1988. http://epubs.surrey.ac.uk/847792/.

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First the method of gas-liquid chromatography (GLC) has been used to obtain partition coefficients, K, at infinite dilution on polymeric and non-polymeric phases. About 30-40 solutes were studied per stationary phase. Secondly the method of gas-solid chromatography has been used to obtain adsorption isotherms for a series of adsorbents by the technique of elution by characteristic point (ECP). A single injection of a gas or vapour suffices to obtain the isotherm, and then the limiting Henry's law constant, Kh, for adsorption at low surface coverage. About 20-30 solutes were studied per adsorbe

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19

Wang, Anzi. "Microchip Thermal Gradient Gas Chromatography." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4300.

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Although the airbath oven is a reliable heating method for gas chromatography (GC), resistive heating is needed for higher analytical throughput and on-site chemical analysis because of size, heating rate and power requirements. In the last thirty years, a variety of resistive heating methods were developed and implemented for both benchtop and portable GC systems. Although fast heating rates and low power consumption have been achieved, losses in column efficiency and resolution, complex construction processes and difficulties experienced in recovering damaged columns have also become problem

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20

Lyne, P. M. "Heater displacement chromatography." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376927.

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21

Vilorio, Carlos R. "Gas Chromatography Micro-Chip with High Temperature Interface and Silk Screen Heaters." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8690.

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There has been substantial market demand for a portable Gas Chromatography (GC) system. Throughout the years, much progress has been made on fabricating a micro system that works as well as a benchtop system. Unfortunately, even though many substrates, channel types, channel widths, temperature control systems, and interface solutions have been attempted, existing versions of the micro-GC still fall short of the ideal. This thesis presents the design, fabrication, and testing of a silicon based micro-GC column that presents a solution for interfacing and heating of the chip. A polyimide resin

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22

Fuchs, Géraldine. "Étude du fractionnement d'énantiomères par chromatographie a l'échelle semi-industrielle." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL031N.

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Contrairement aux autres méthodes enantiosélectives comme la cristallisation ou la conversion enzymatique, les procédés chromatographiques tendent à se généraliser grâce au nombre croissant de phases disponibles sur le marché; parallèlement la chromatographie chirale est surtout utilisée à l'échelle analytique, du fait du cout très élevé de ces phases, de leur faible capacité, et aussi de leur diffusion commerciale limitée. Dans ce travail, nous présentons des résultats expérimentaux obtenus à l'échelle préparatoire par deux procédés classiques d'élution (phase supercritique, phase gazeuse), a

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23

Thewalim, Yasar. "Retention time predictions in Gas Chromatography." Doctoral thesis, Stockholm University, Department of Analytical Chemistry, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-55088.

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In gas chromatography, analytes are separated by differences in their partition between a mobile phase and a stationary phase. Temperature-program, column dimensions, stationary and mobile phases, and flow rate are all parameters that can affect the quality of the separation in gas chromatography. To achieve a good separation (in a short amount of time) it is necessary to optimize these parameters. This can often be quite a tedious task. Using computer simulations, it is possible to both gain a better understanding of how the different parameters govern retention and separation of a given set

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24

Hickling, Simon James. "Liquid crystal polymers for gas chromatography." Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760726.

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25

Ali, Syed Aftab. "Semi-Packed Micro Gas Chromatography Columns." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35201.

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Separation of complex gaseous mixtures using gas chromatography (GC) is an important step in analytical systems for environmental monitoring, medical diagnosis, and forensic science. Due to its high resolving power, analysis speed, and small sample size, GC, has become the premier technique for separation and analysis of volatile and semi-volatile organic compounds. Miniaturization of analytical systems has become a major trend which is mainly driven by advancements in microfabrication techniques and a need for portable lab-on-a-chip systems for onsite monitoring. Microfabricated columns have

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26

Contreras, Jesse Alberto. "Axial Temperature Gradients in Gas Chromatography." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2645.

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The easiest and most effective way to influence the separation process in gas chromatography (GC) is achieved by controlling the temperature of the chromatographic column. In conventional GC, the temperature along the length of the column is constant at any given time, T(t). In my research, I investigated the effects of temperature gradients on GC separations as a function of time and position, T(t,x), along the column. This separation mode is called thermal gradient GC (TGGC). The research reported in this dissertation highlights the fundamental principles of axial temperature gradients and t

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27

Haudebourg, Raphael. "Application of sputtering to micro gas chromatography : a novel collective stationary phase disposition technique for micro gas chromatography columns fabrication : feasibility, evaluations and oilfield applications." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2014. http://tel.archives-ouvertes.fr/tel-00987621.

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A totally new solid stationary phase deposition technique for micro machined gas chromatography (GC) columns fabrication was proposed: to overcome the limitations of conventional liquid (or occasionally solid) stationary phases in terms of very volatile compounds retention and/or clean room batch production, an approach consisting of the collective direct deposition of the adsorbent in micro columns channels by sputtering was performed. The process was fully compatible with clean room fabrication flow and industry-ready, with very good precision results. Silica, alumina, graphite and magnesia

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28

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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29

Richard, Charlotte. "Typicité aromatique des vins rosés de Provence : approches analytiques et sensorielles." Electronic Thesis or Diss., Université Côte d'Azur, 2025. http://www.theses.fr/2025COAZ5000.

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Le marché du vin rosé s'étend mondialement depuis les dernières décennies. Ce type de vin est désormais produit dans de plus en plus de régions viti-vinicoles. Dans ce contexte, la Provence, leader mondial de la production de vin rosé d'appellation d'origine protégée (AOP), cherche à approfondir les liens entre les perceptions sensorielles et la composition aromatique de ses vins afin d'étayer son positionnement sur le marché et de conserver la qualité aromatique de ses vins, reconnue internationalement. Les travaux de cette thèse portent sur : 1) L'optimisation et la comparaison de trois méth

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30

Doolan, K. P. "Pyrolysis gas chromatography mass spectrometry of paints." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269081.

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31

Bagheri, Habib. "Vapour-phase fluorescence detection in gas chromatography." Thesis, University of East Anglia, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280036.

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32

Chow, W. M. L. "Capilliary column gas chromatography in forensic science." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371945.

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33

McLaughlin, Paul John. "Temperature programmed, multiple probe, inverse gas chromatography." Thesis, Manchester Metropolitan University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393284.

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34

Perera, Ibon. "Characterisation of heterogeneous surfaces by gas chromatography." Thesis, Manchester Metropolitan University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431240.

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35

Bao, Jianxiong. "Negative Temperature Programming using Microwave Gas Chromatography." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33828.

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The microwave region of the electromagnetic spectrum lies between the infrared radiation and radio frequency region and corresponds to wavelengths of 1 cm to 1 m (frequencies of 30 GHz to 300 MHz respectively). Gaisford and Walters developed the microwave GC oven in 2000, which operated at 919 MHz. The microwave GC oven has been engineered to generate a uniform microwave field around an open tubular capillary column with elimination of cold spots which are common in a domestic microwave oven. Only the column is heated in a microwave GC oven. In microwave GC, ramp rates in excess of 6 degree/se

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36

Urias, Kari R. "Experimental Studies in Temperature Programmed Gas Chromatography." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/36026.

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Temperature programmed gas chromatography (TPGC) is commonly used for the analysis of complex samples with a wide range of boiling points. It is estimated that 80% of GC users implement TPGC on a regular basis. In 1962, John Calvin Giddings was the first to publish a simple model for TPGC. His theories concerning TPGC are still accepted as the benchmark for explaining the underlying theory. The purpose of this research was to investigate, as speculated by Giddings, if temperature programming rate (b) is the dominant contribution in determining fundamental chromatographic values, such as reten

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37

Hirtenstein, Daniel andre. "Surface Modifications for Gas Chromatography Micro Columns." W&M ScholarWorks, 2013. https://scholarworks.wm.edu/etd/1539626945.

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38

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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39

Lu, Yao. "Forensic Applications of Gas Chromatography-Differential Mobility Spectrometry, Gas Chromatography/Mass Spectrometry, and Ion Mobility Spectrometry with Chemometric Analysis." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1267816777.

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40

Heslop, Mark J. "Binary gas adsorption in molecular sieves." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/6861.

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This thesis is concerned with the development of sorption-effect chromatography as a rapid method for the determination of binary gas-mixture adsorption isotherms.There are many alternative non-chromatographic methods but these have inherent disadvantages the direct experimental methods require excessive equilibration times and the predictive methods require the respective pure-component isotherms and an ideal adsorbed phase. A computer simulation has shown that for an alternative chromatographic method, good results will only be obtained if both binary isotherms are close to linear. Sorption-

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41

Perera, S. P. "Gas chromatography and surface chemistry of porous polymers." Thesis, Brunel University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376652.

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42

Hunter, Maxwell Charles. "Analysis of atmospheric oxygenated hydrocarbons by gas chromatography." Thesis, University of Leeds, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399908.

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43

Dias, H. "Gas and liquid chromatography on porous graphitic carbon." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/13643.

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A new hydrophobic support material, Porous Graphitic (or Graphitised) Carbon (PGC) has been studied using both Liquid (LC) and Gas Chromatography (GC). The heat of adsorbtion (AH) of typical LC solvents determined on PGC, using GC, showed that AH increased with the molecular area (Ax) of solvents for well graphitised carbons, but that AH/Ax values were similar for all solvents studied. By definition, AH/Ax is a measure of eluotropic strength. The results reveal that a strong eluotropic series does not exist on carbon. A strong eluotropic series does exist on silica. In this case, AH/Ax values

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44

Webster, Caroline S. "Applications of coupled gas chromatography-atomic emission detection." Thesis, Sheffield Hallam University, 1995. http://shura.shu.ac.uk/20507/.

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This thesis describes the evaluation and application of the atomic emission detector as a detector for capillary gas chromatography. Chapter 1 is a general introduction to the technique, describing the development of the atomic emission detector, the theory of its operation, and some of its applications. This chapter also includes a detailed description of chromatography theory. Chapter 2 describes the experimental conditions used throughout the course of this work. Chapter 3 concentrates on compound independent calibration, beginning with a general introduction to the area and a discussion of

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45

Chan, Ryan. "Density Modulated Semi-Packed Micro Gas Chromatography Columns." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83448.

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With the continued evolution of MEMS-based gas chromatography, the drive to develop new standalone systems with lower power consumptions and higher portability has increased. However, with improvements come tradeoffs, and trying to reduce the pressure drop requirements of previously reported semi-packed columns causes a significant sacrifice in separation efficiency. This thesis covers the techniques for evaluating the separation column in a gas chromatography system as well as the important parameters that have the most effect on a column’s efficiency. Ionic liquids are introduced as a stable

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46

Turner, Kelly A. "Polyethylene glycol stationary phases for capillary gas chromatography." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/44090.

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The chromatographic properties of various silicone stationary phases for capillary gas chromatography have been extensively studied, yet the properties of nonsilicone phases have not been so well investigated. The most popular nonsilicone phases are the high molecular weight polyethylene glycols (HMW PEG) which are commercially available in a wide range of molecular weights, crossâ linkable and uncross-linkable (Carbowax 2OM and 4OM, the Superox series, etc.). Their most outstanding features are their unique polarity and selectivity; for this reason these phases are widely used in the analys

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47

Heng, Kien Chhiev. "Effect of column temperature on elution order in gas chromatography." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01312009-063555/.

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48

Snow, Nicholas Harrer. "Numerical extrapolations for retention time prediction in capillary gas chromatography." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-170350/.

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49

FRAZER, SCOTT RAYMOND. "INFORMATION EXTRACTION IN CHROMATOGRAPHY USING CORRELATION TECHNIQUES." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187978.

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While research into improving data quality from analytical instrumentation has gone on for decades, only recently has research been done to improve information extraction methods. One of these methods, correlation analysis, is based upon the shifting of one function relative to another and determining a correlation value for each displacement. The cross correlation algorithm allows one to compare two files and find the similarities that exist, the convolution operation combines two functions two dimensionally (e.g. any input into an analytical instrument convolves with that instrument response

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50

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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