Relevant bibliographies by topics / Gas chromatography

Academic literature on the topic 'Gas chromatography'

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Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Gas chromatography"

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Arzu Ibragimova, Arzu Ibragimova. "BENEFITS OF USING A FID TO MEASURE THE MULTICOMPONENT GAS MIXTURES." PIRETC-Proceeding of The International Research Education & Training Centre 27, no. 06 (August 25, 2023): 131–39. http://dx.doi.org/10.36962/piretc27062023-131.

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The development of the oil and gas complex is one of the priority areas of the Azerbaijan economy. Oil and gas are among the most competitive Azerbaijan goods and are in high and stable demand from global consumers. Therefore, increased attention is paid to product quality. One of the methods for quality control of petroleum products is gas chromatography. Today it is a widely used physical and chemical research method. The capabilities of a gas chromatography are mainly determined by the enormous separating power of the chromatographic columns and the characteristics of the detectors. If the chromatographic column is sometimes called the heart of the chromatograph, then the detector can be called the brain of the chromatograph [1,2]. Effective development of an analysis technique, its successful implementation, troubleshooting of a chromatograph, and metrological certification are impossible without the ability to make the right choice of a detector, operate it competently, and correctly interpret the detector signal. About 50 detectors have been proposed for gas chromatography, but only a few of them are used in practice. The most used are the flame ionization detector and the thermal conductivity detector. The article shows the advantage of using a flame ionization detector to measure important physical and chemical properties, such as density, caloric content, the ratio of the number of carbon atoms to the number of hydrogen atoms C/H. Keywords: Chromatography, gas-mixture, density, hydrocarbon, heat of combustion, calorific value, flame ionization detector, number of carbon atoms, sensitivity, quality.
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Meng, Xin Xin, and Shu Lin Yang. "Comparison of Gas Chromatography and Liquid Chromatogram Detecting Pesticide Residue." Applied Mechanics and Materials 539 (July 2014): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amm.539.113.

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The existing methods of detecting pesticide residue include gas chromatography, high performance liquid chromatography, gas chromatograph-mass, liquid chromatograph-mass, capillary electrophoresis, radioimmunoassay, biosensor and rapid detection on the spot. The paper analyzes the comparison of gas chromatography and liquid chromatogram detecting pesticide residue, for achieving the development tendency and the future goal of analyzing pesticide residue.
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Tong, Daixin, Keith D. Bartle, Anthony A. Clifford, and Robert E. Robinson. "Unified chromatograph for gas chromatography, supercritical fluid chromatography and micro-liquid chromatography." Analyst 120, no. 10 (1995): 2461. http://dx.doi.org/10.1039/an9952002461.

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Ogierman, Leonard. "Gas Chromatography of Uracil Herbicides by On-Column Methylation with Trimethylanilinium Hydroxide." Journal of AOAC INTERNATIONAL 69, no. 5 (September 1, 1986): 912–14. http://dx.doi.org/10.1093/jaoac/69.5.912.

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Abstract Substituted uracil herbicides injected into a gas chromatograph react with trimethylanilinium hydroxide to give iV-methyl derivatives with good gas chromatographic properties. Maximum methylation is obtained when the molar ratio of methylating reagent to herbicide is ca 4:1. This technique for preparing derivatives provides rapid qualitative and quantitative chromatography of the substances examined. Chromatographic response was linear with increased concentration for the synthetic standard and the on-column product of uracil herbicide. The proposed derivatization method was used to analyze herbicides in formulations. The methyl derivatives were identified spectroscopically
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TSUBOUCHI, Kenjiro. "Gas Chromatography." Journal of the Japan Society of Colour Material 63, no. 9 (1990): 550–61. http://dx.doi.org/10.4011/shikizai1937.63.550.

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KOMORI, Kyoichi. "Gas Chromatography." Journal of the Japan Society of Colour Material 78, no. 8 (2005): 377–83. http://dx.doi.org/10.4011/shikizai1937.78.377.

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Dorman, Frank L., Joshua J. Whiting, Jack W. Cochran, and Jorge Gardea-Torresdey. "Gas Chromatography." Analytical Chemistry 82, no. 12 (June 15, 2010): 4775–85. http://dx.doi.org/10.1021/ac101156h.

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Eiceman, Gary A., Jorge Gardea-Torresdey, Ed Overton, Ken Carney, and Frank Dorman. "Gas Chromatography." Analytical Chemistry 76, no. 12 (June 2004): 3387–94. http://dx.doi.org/10.1021/ac0400663.

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Clement, Ray E., Francis I. Onuska, Gary A. Eiceman, and Herbert H. Hill. "Gas chromatography." Analytical Chemistry 62, no. 12 (June 15, 1990): 414–22. http://dx.doi.org/10.1021/ac00211a028.

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Willett, J. E., and Roger M. Smith. "Gas chromatography." Analytica Chimica Acta 202 (1987): 260–61. http://dx.doi.org/10.1016/s0003-2670(00)85929-2.

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Dissertations / Theses on the topic "Gas chromatography"

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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-electromechanical system (MEMS) and nanotechnology based solutions to miniaturize the key components of GC instrument (pre-concentrator/injector, separation column, valves, pumps, and the detector). The purpose of this dissertation is to address the critical need of developing a micro GC system for various field- applications. The uniqueness of this work is to emphasize on the importance of integrating the basic components of μGC (including sampling/injection, separation and detection) on a single platform. This integration leads to overall improved performance as well as reducing the manufacturing cost of this technology. In this regard, the implementation of micro helium discharge photoionization detector (μDPID) in silicon-glass architecture served as a major accomplishment enabling its monolithic integration with the micro separation column (μSC). For the first time, the operation of a monolithic integrated module under temperature and flow programming conditions has been demonstrated to achieve rapid chromatographic analysis of a complex sample. Furthermore, an innovative sample injection mechanism has been incorporated in the integrated module to present the idea of a chip-scale μGC system. The possibility of using μGC technology in practical applications such as breath analysis and water monitoring is also demonstrated. Moreover, a nanotechnology based scheme for enhancing the adsorption capacity of the microfabricated pre-concentrator is also described.
Ph. D.
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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 enriched tritiated water samples which were then counted to determine the levels of activity. The total time taken to conduct the complete enrichment procedure and counting of the collected samples was less than one working day. This system also showed the capability of enriching quantities of water samples as small as 20 ml. This was about ten times less than required in the conventional enrichment techniques. Extensive efforts were made to attain optimum operational, reproducible and efficient measurements of tritium enrichment for quantitative analysis. The developed experimental technique involved injecting a known volume of water into a preheated furnace to react with magnesium turnings, in the presence of a carrier gas, to produce the hydrogen isotopes. These isotopes were separated using the principles of chromatography. Liquid scintillation counting method was employed to determine the activity of the collected samples. Two gases, nitrogen and helium, were utilized as the carrier gases during this investigation. Best values of enrichment were obtained with the use of nitrogen as a carrier gas, but the samples collected were difficult to count due to the formation of ammonia with consequent chemical complications.
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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 adsorbent. Experiments were carried out at several levels of relative humidity (RH) 0%, 31% and 53%. The solute compounds used were chosen so as to have a wide range of properties such as polarity (pi*2), hydrogen-bond acidity (alpha[H]2), and hydrogen-bond basicity (beta[H]2). The results as log partition coefficients or -log Henry's constants were analysed by multiple linear regression analysis using equations such as: -LogK[H] or LogK = SPo + s.pi* 2 + a.alpha[H]2 + b.beta[H]2 + 1. LogL[18] where L[18] is the solute Ostwald absorption coefficient on n-hexadecane. In this way, the selectivity of the liquid polymeric phase or solid adsorbent towards classes of compound was investigated and equations for the prediction of further values of LogK or LogK[H] formulated. In parallel with the measurement of partition coefficients on liquid polymeric phases by GLC in this work, partition coefficients for the polymers have been determined using surface acoustic wave (SAW) devices by coworkers at the Naval Research Laboratory, Washington. The results for a series of 8-9 solutes in six polymeric phases show that partition coefficients and patterns of responses predicted through GLC experiments are the same as those found experimentally using coated SAW devices. Hence GLC can be used to evaluate possible coating materials, and by the technique of multiple linear regression analysis, to predict SAW responses for a multitude of vapours.
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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 problematic for routine use of resistively heated columns. To solve these problems, a new resistively heated column technique, which uses metal columns and self-insulated heating wires, was developed for capillary gas chromatography. With this method, the total thermal mass was significantly less than in commercial column assemblies. Temperature-programming using resistive heating was at least 10 times faster than with a conventional oven, while only consuming 1—5% of the power that an oven would use. Cooling a column from 350 °C to 25 °C with an air fan only required 1.5 min. Losses in column efficiency and peak capacity were negligible when compared to oven heating. The major trade-off was slightly worse run-to-run retention time deviations, which were still acceptable for most GC analyses. The resistively heated column bundle is highly suitable for fast GC separations and portable GC instruments. Fabrication technologies for microelectromechanical systems (MEMS) allow miniaturization of conventional benchtop GC to portable, microfabricated GC (µGC) devices, which have great potential for on-site chemical analysis and remote sensing. The separation performance of µGC systems, however, has not been on par with conventional GC. Column efficiency, peak symmetry and resolution are often compromised by column defects and non-ideal injections. The relatively low performance of µGC devices has impeded their further commercialization and broader application. This problem can be resolved by incorporating thermal gradient GC (TGGC) into microcolumns. Negative thermal gradients reduce the on-column peak width when compared to temperature-programmed GC (TPGC) separations. This unique focusing effect can overcome many of the shortcomings inherent in µGC analyses. In this dissertation research, the separation performance of µGC columns was improved by using thermal gradient heating with simple set-ups. The analysis time was ~20% shorter for TGGC separations than for TPGC when wide injections were performed. Up to 50% reduction in peak tailing was observed for polar analytes, which significantly improved their resolution. The signal-to-noise ratios (S/N) of late-eluting peaks were increased by 3 to 4 fold. These results indicate that TGGC is a useful tool for bridging the performance gap between µGC and benchtop GC.
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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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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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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 of analytes, and to optimize the parameters within minutes. In the research presented here, this was achieved by taking a thermodynamic approach that used the two parameters ΔH (enthalpy change) and ΔS (entropy change) to predict retention times for gas chromatography. By determining these compound partition parameters, it was possible to predict retention times for analytes in temperature-programmed runs. This was achieved through the measurement of the retention times of n-alkanes, PAHs, alcohols, amines and compounds in the Grob calibration mixture in isothermal runs. The isothermally obtained partition coefficients, together with the column dimensions and specifications, were then used for computer simulation using in-house software. The two-parameter model was found to be both robust and precise and could be a useful tool for the prediction of retention times. It was shown that it is possible to calculate retention times with good precision and accuracy using this model. The relative differences between the predicted and experimental retention times for different compound groups were generally less than 1%. The scientific studies (Papers I-IV) are summarized and discussed in the main text of this thesis.
At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.
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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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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 been explored for applications in analytical processes like GC in several research studies. These microGC columns typically have open rectangular or open circular cross sections which is a result of the etching process utilized in the fabrication. This work reports the fabrication and performance of a new generation of silicon-on-glass micro-electro-mechanical systems (MEMS) based GC columns with microposts namely â semi-packed.â These columns can be fabricated on a 2 cm2-die for a 1 m-long channel or a 1 cm2-die for a 25 cm-long channel. The semi-packed columns have a higher sample capacity as the overall surface area is larger than that of open rectangular columns of the same dimensions. The separation efficiency of these columns is also superior to that of open columns due to the presence of the microposts. As compared to conventional packed columns, the semi-packed columns show lower pressure drops and a more uniform flow profile, both of which contribute to, performance in terms of separation efficiency.
Master of Science
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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 the separation potential of the TGGC technique. These goals were achieved through the development of mathematical models and instrumentation that allowed study of the effects of axial temperature gradients. The use of mathematical models and computer simulation facilitated evaluation of different gradient profiles and separation strategies prior to development of the instrumentation, providing theoretical proof of concept. Three instruments capable of generating axial temperature gradients, based on convective cooling and resistive heating, were developed and evaluated. Unique axial temperature gradients, such as nonlinear and moving sawtooth temperature gradients with custom profiles were generated and evaluated. The results showed that moving sawtooth temperature gradients allowed continuous analysis and were well-suited for comprehensive GCxGC separations. The use of custom temperature profiles allowed unique control over the separation power of the system, improving separations, as well as selectively increasing the peak capacity and signal-to-noise. A direct comparison of TGGC with conventional GC methods showed that TGGC produces equivalent separations to temperature programmed GC. This technology holds great promise for performing smart separations in which the column volume is most efficiently utilized and optimum separations can be quickly achieved. Moreover, precise control of the elution of compounds can be used to greatly reduce method development time in GC. This feature can be automated using feedback to develop efficient separations with minimum user intervention. This technology is of special interest in micro-GC systems, which allows relatively easy incorporation of resistive heating elements in the micro-column design.
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Books on the topic "Gas chromatography"

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Poole, C. F. Gas chromatography. Amsterdam: Elsevier, 2012.

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1933-, Miller James M., ed. Basic gas chromatography. New York: Wiley, 1998.

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1933-, Miller James M., ed. Basic gas chromatography. 2nd ed. Hoboken, N.J: John Wiley & Sons, 2009.

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D, Kealey, and ACOL (Project), eds. Gas chromatography. Chichester [West Sussex]: Wiley, 1987.

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Kolb, Bruno. Static Headspace-Gas Chromatography. New York: John Wiley & Sons, Ltd., 2006.

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1957-, Tebbett I., ed. Gas chromatography in forensic science. New York: E. Horwood, 1992.

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Lloyd, Douglas R., Thomas Carl Ward, Henry P. Schreiber, and Clara C. Pizaña, eds. Inverse Gas Chromatography. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0391.

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Leland, Jane V., Peter Schieberle, Andrea Buettner, and Terry E. Acree, eds. Gas Chromatography-Olfactometry. Washington, DC: American Chemical Society, 2001. http://dx.doi.org/10.1021/bk-2001-0782.

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Kaiser, Rudolf. Gas Phase Chromatography. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4684-8294-2.

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Dettmer-Wilde, Katja, and Werner Engewald, eds. Practical Gas Chromatography. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54640-2.

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Book chapters on the topic "Gas chromatography"

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Yang, Rui. "Gas Chromatography and Inverse Gas Chromatography." In Analytical Methods for Polymer Characterization, 1–24. Boca Raton : CRC Press, 2018.: CRC Press, 2018. http://dx.doi.org/10.1201/9781351213158-1.

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Nielsen, S. Suzanne. "Gas Chromatography." In Instructor’s Manual for Food Analysis: Second Edition, 120–24. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5439-4_33.

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Armitage, Ruth Ann. "Gas Chromatography." In Encyclopedia of Geoarchaeology, 287–92. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-1-4020-4409-0_16.

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Bakajin, Olgica. "Gas Chromatography." In Encyclopedia of Microfluidics and Nanofluidics, 1265–69. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_611.

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Qian, Michael C. "Gas Chromatography." In Food Analysis Laboratory Manual, 155–64. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-1463-7_19.

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Qian, Michael C., Devin G. Peterson, and Gary A. Reineccius. "Gas Chromatography." In Food Science Texts Series, 513–37. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-1478-1_29.

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Gordon, M. H., and R. Macrae. "Gas chromatography." In Instrumental Analysis in the Biological Sciences, 41–66. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-1521-6_3.

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Stern, Jennifer C. "Gas Chromatography." In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_621-3.

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Stern, Jennifer C. "Gas Chromatography." In Encyclopedia of Astrobiology, 921–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_621.

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Qian, Michael. "Gas Chromatography." In Food Analysis Laboratory Manual, 129–37. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4757-5250-2_18.

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Conference papers on the topic "Gas chromatography"

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Fan, Xudong. "Smart multi-dimensional gas chromatography." In 2013 IEEE Sensors. IEEE, 2013. http://dx.doi.org/10.1109/icsens.2013.6688123.

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Stadler, M. P., M. D. Deo, and F. M. Orr. "Crude Oil Characterization Using Gas Chromatography and Supercritical Fluid Chromatography." In SPE International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/25191-ms.

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He, Zilan, Baiquan Chen, Daopin Chen, Jianneng Zhang, Pengjiang Xu, and Sixiang Chen. "Research progress on gas chromatography columns." In 3rd International Conference on Precision Instruments and Optical Engineering (PIOE 2023), edited by Wei Tao, Hailang Pan, and Baoli Yao. SPIE, 2023. http://dx.doi.org/10.1117/12.3011043.

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Bulbul, Ashrafuzzaman, and Hanseup Kim. "PPB level gas quantification by bubble chromatography." In 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS). IEEE, 2017. http://dx.doi.org/10.1109/transducers.2017.7994135.

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Hsieh, Hao-Chieh, and Hanseup Kim. "Miniature circulatory column system for gas chromatography." In 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2014. http://dx.doi.org/10.1109/memsys.2014.6765814.

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GUMMA, SASIDHAR, and ORHAN TALU. "INFINITE DILUTION SELECTIVITY MEASUREMENTS BY GAS CHROMATOGRAPHY." In Proceedings of the Third Pacific Basin Conference. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704320_0019.

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Labreche, S., O. Cabrol, F. Loubet, H. Amine, Matteo Pardo, and Giorgio Sberveglieri. "Gas chromatography instrumental variation and drift compensation." In OLFACTION AND ELECTRONIC NOSE: Proceedings of the 13th International Symposium on Olfaction and Electronic Nose. AIP, 2009. http://dx.doi.org/10.1063/1.3156624.

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Liu Jingke, Shanbai Xiong, Zhang Yuzong, Siming Zhao, and Zhao Wei. "The analysis of odor character of cooked silver carp muscles using gas chromatography-mass spectrometry and gas chromatography-olfactometry." In 2011 International Conference on New Technology of Agricultural Engineering (ICAE). IEEE, 2011. http://dx.doi.org/10.1109/icae.2011.5943925.

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Miricioiu, Marius. "CRITICAL ASPECTS IN GAS CHROMATOGRAPHY: LOW LEVEL DETECTION OF GAS IMPURITIES." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b52/s20.017.

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Arcamone, J., A. Niel, V. Gouttenoire, M. Petitjean, N. David, R. Barattin, M. Matheron, et al. "VLSI silicon multi-gas analyzer coupling gas chromatography and NEMS detectors." In 2011 IEEE International Electron Devices Meeting (IEDM). IEEE, 2011. http://dx.doi.org/10.1109/iedm.2011.6131637.

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Reports on the topic "Gas chromatography"

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Laub, R. J. Inverse Gas Chromatography. Fort Belvoir, VA: Defense Technical Information Center, September 1990. http://dx.doi.org/10.21236/ada227677.

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Bora. PR-004-14604-R01 Miniaturized Gas Chromatography and Gas Quality Sensor. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 2015. http://dx.doi.org/10.55274/r0010869.

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The natural gas industry currently relies on gas chromatography to evaluate the composition of natural gas including alkanes, carbon dioxide, nitrogen, and oxygen. The higher and lower heating values, Wobbe Index, Hydrocarbon Dewpoint, Methane Number, and viscosity are all calculated from the gas composition. The need to understand the composition of fuel gas and to monitor its components is crucial to the natural gas industry. Monitoring the composition of the fuel gas provides the industry with the capability of protecting valuable underground assets, delivering gas that meets end-usage requirements, and tracking of constituents for both billing purposes and to ensure compliance with tariff agreements. As with any technology, there are limitations to gas chromatography. Limitations can include high cost, time delay, inability to sample at high pressure, and selectiveness of gas chromatography detectors. This project consisted of a technology assessment of currently available and emerging technologies including micro gas chromatographs, optical spectrometers, and mass spectrometers for their ability to determine gas composition compared to current GC technology. Technologies were investigated and assessed by their analytical characteristics (what components they could analyze and detection limits), their sampling characteristics (sampling pressure limits, scan time, and emissions), and their operational characteristics (availability, cost, consumables, maintenance, and packaging). Recommendations for further testing were made on the technologies whose characteristics showed the most promise for analysis of natural gas at custody transfer points.
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Sklarew, D. S., J. C. Evans, and K. B. Olsen. Multielement detector for gas chromatography. Office of Scientific and Technical Information (OSTI), November 1988. http://dx.doi.org/10.2172/6806223.

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4

Varma, A., J. F. Danovich, and C. R. Oprandi. Monitoring Nitrogen Purity by Gas Chromatography. Fort Belvoir, VA: Defense Technical Information Center, July 1987. http://dx.doi.org/10.21236/ada213577.

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5

Fowler, M. G., P. W. Brooks, and L. R. Snowdon. Gas Chromatography and Gas Chromatography - Mass Spectrometry Data of Some Jeanne D'arc Basin Oil Saturate Fractions. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/130688.

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Hall and Brown. PR-343-14607-R01 Miniaturized Gas Chromatography and Gas Quality Sensor. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), February 2015. http://dx.doi.org/10.55274/r0010558.

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In natural gas transmission and distribution, many metering stations utilize gas chromatography to ensure the gas complies with the pipeline�s gas quality tariff provisions and to determine the chemical energy content of the gas for billing purposes. It is also used as a check on the operation of gas ultrasonic flowmeters through a calculation of the speed of sound in the gas. Because of limitations on existing gas chromatographs (GC�s), including high installed cost, analysis time, carrier gas consumption and others, there is a desire to consider alternate technologies for natural gas analysis. PRCI has sponsored a study of technologies that utilize the variation in absorption/scattering of optical wavelengths by different molecules. The purpose of this study is to extend that study to the use of additional technologies, such as MEMS (Micro-Electro-Mechanical Systems). This is not a new approach, but recent advancements offer a greater possibility of achievement of the desired goals than in the past. This study reviewed and evaluated work in process with MEMS technology to provide a smaller, less ex-pensive, lower-power and faster GC that can be utilized in a Class 1 Division 2 area. Developments at both commercial firms and in university MEMS research programs have been included. Since there have been several programs to evaluate �energy meters� that attempt to measure gas quality by calculating the BTU content of a gas sample, this study focused on micro-GC�s that can make a much more precise measurement of gas quality.
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Romero, Louis Anthony, and Michael L. Parks. On the two-domain equations for gas chromatography. Office of Scientific and Technical Information (OSTI), January 2009. http://dx.doi.org/10.2172/978912.

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Coulombe, S., G. Jean, P. Chantal, and S. Kaliaguine. Characterization of products from the upgrading of sorbitol using gas chromatography/mass spectrometry and gas chromatography/Fourier transform infrared spectrometry. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302617.

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Strasburg, R. Peak analysis in gas chromatography and the development of new stationary phases for anion chromatography. Office of Scientific and Technical Information (OSTI), July 1990. http://dx.doi.org/10.2172/7022719.

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Patterson, Phillip, and William Lum. Determining the Exempt Solvent Content of Coatings Using Gas Chromatography. Fort Belvoir, VA: Defense Technical Information Center, December 2002. http://dx.doi.org/10.21236/ada409477.

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