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Journal articles on the topic 'Gas chromatography'

To see the other types of publications on this topic, follow the link: Gas chromatography.

Author: Grafiati

Published: 4 June 2021

Last updated: 30 July 2024

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Clement, Ray E., Francis I. Onuska, Gary A. Eiceman, and Herbert H. Hill. "Gas chromatography." Analytical Chemistry 60, no. 12 (June 15, 1988): 279–94. http://dx.doi.org/10.1021/ac00163a020.

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12

Eiceman, Gary A., Herbert H. Hill, and Jorge Gardea-Torresdey. "Gas Chromatography." Analytical Chemistry 72, no. 12 (June 2000): 137–44. http://dx.doi.org/10.1021/a10000054.

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13

Eiceman, Gary A., Herbert H. Hill, Behnam Davani, and Jorge Gardea-Torresday. "Gas Chromatography." Analytical Chemistry 68, no. 12 (January 1996): 291–308. http://dx.doi.org/10.1021/a1960013d.

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14

Eiceman, Gary A., Herbert H. Hill, and Jorge Gardea-Torresdey. "Gas Chromatography." Analytical Chemistry 70, no. 12 (June 1998): 321–40. http://dx.doi.org/10.1021/a1980016l.

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15

Eiceman, Gary A., Jorge Gardea-Torresdey, Frank Dorman, Ed Overton, A. Bhushan, and H. P. Dharmasena. "Gas Chromatography." Analytical Chemistry 78, no. 12 (June 2006): 3985–96. http://dx.doi.org/10.1021/ac060638e.

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16

Eiceman, Gary A., R. E. Clement, and Herbert H. Hill. "Gas chromatography." Analytical Chemistry 64, no. 12 (June 15, 1992): 170–80. http://dx.doi.org/10.1021/ac00036a010.

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17

Eiceman, Gary A., Jorge Gardea-Torresdey, Ed Overton, Kenneth Carney, and Frank Dorman. "Gas Chromatography." Analytical Chemistry 74, no. 12 (June 2002): 2771–80. http://dx.doi.org/10.1021/ac020210p.

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18

Janak, Jaroslav. "Gas chromatography." Journal of Chromatography A 404 (January 1987): 292–94. http://dx.doi.org/10.1016/s0021-9673(01)86864-3.

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19

Eiceman, Gary A., Herbert H. Hill, and Behnam Davani. "Gas Chromatography." Analytical Chemistry 66, no. 12 (June 1994): 621–33. http://dx.doi.org/10.1021/ac00084a023.

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20

Clement, Ray E., Francis I. Onuska, Frank J. Yang, Gary A. Eiceman, and Herbert H. Hill. "Gas chromatography." Analytical Chemistry 58, no. 5 (April 1986): 321–35. http://dx.doi.org/10.1021/ac00296a022.

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21

Dorman, Frank L., Edward B. Overton, Joshua J. Whiting, Jack W. Cochran, and Jorge Gardea-Torresdey. "Gas Chromatography." Analytical Chemistry 80, no. 12 (June 2008): 4487–97. http://dx.doi.org/10.1021/ac800714x.

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22

Guiochon, Georges, and Claude L. Guillemin. "Gas chromatography." Review of Scientific Instruments 61, no. 11 (November 1990): 3317–39. http://dx.doi.org/10.1063/1.1141631.

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23

Wu, Naijun, Juan Carlos Medina, and Milton L. Lee. "Fast gas chromatography: packed column solvating gas chromatography versus open tubular column gas chromatography." Journal of Chromatography A 892, no. 1-2 (September 2000): 3–13. http://dx.doi.org/10.1016/s0021-9673(00)00152-7.

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24

Denisov, I. S., V. V. Korotkov, and D. S. Smirnov. "Gaschromatographic monitoring of volatile pollutants of urban air: optimizing analysis and concentrating." Sanitarnyj vrač (Sanitary Doctor), no. 10 (October 1, 2020): 70–76. http://dx.doi.org/10.33920/med-08-2010-08.

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For determining 22 volatile organic compounds in the atmospheric air, the operating modes of the gas chromatographic complexes «chromatography-mass spectrometer — two-stage thermodesorber» and «gas chromatograph with 2 FID — static headspace analysis sampler» are optimized. The modes provide the values of the separation coefficients of the chromatographic peaks in the range of 1.5 ÷ 21. It has been experimentally established that the highest desorption efficiency of volatile organic compounds is registered when the sample is concentrated into Tenax TA sorption tubes.

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25

Grob, Konrad, and Zhangwan Li. "Damage to gas chromatographic columns caused by peroxides in liquid chromatographic eluents for coupled liquid chromatography-gas chromatography." Journal of Chromatography A 455 (January 1988): 297–300. http://dx.doi.org/10.1016/s0021-9673(01)82128-2.

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26

White, M. A., M. D. Simmons, A. Bishop, and H. A. Chandler. "Microbial identification by gas chromatography." Journal of The Royal Naval Medical Service 74, no. 3 (December 1988): 141–46. http://dx.doi.org/10.1136/jrnms-74-141.

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AbstractGas chromatography is rapidly being accepted as a valuable technique for the identification of microrganisms, as the speed of identification can be significantly greater than current biochemical techniques. The Health Department of the Institute of Naval Medicine has recently installed a fully automated gas chromatograph dedicated to rapid bacterial analysis particularly in the area of clinical microbiology. This paper describes the preparative and anlytical methods employed by the system and the results of preliminary studies.

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27

Domínguez, José Antonio García, and José Carlos Díez-Masa. "Part B. Retention parameters in gas chromatograpy." Pure and Applied Chemistry 73, no. 6 (June 1, 2001): 969–92. http://dx.doi.org/10.1351/pac200173060969.

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The paper presents a revision of terms in the IUPAC "Nomenclature for Chromatography", Pure and Applied Chemistry, 65, 819-872, 1993. The terms revised pertain to hold-up volumes in gas, liquid, and supercritical-fluid chromatography, as well as to basic retention parameters, especially in gas chromatography. A number of related and derived definitions are described, including definitions of the terms "chromatographic process" and "chromatographic phase system". A number of the original terms were found to be misleading or superfluous, including such terms as corrected retention time, net retention time, total retention volume (time), and specific retention volume at 0 °C, and their use is strongly discouraged In Part A, the concept of the hold-up volume in chromatography is discussed. The paper also compares methods described in the literature to determine the hold-up volume. In Part B, retention parameters in gas chromatography are discussed with the aim of (i) emphasizing the physical meaning of the terms and (ii) specifying the temperatures and pressures for the terms for gas volumes and flow rates. The appendix presents revised recommendations for the terminology of some items, as well as those that are not recommended.

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28

Omelchuk, Sergii T., Alina I. Syrota, and Anna V. Blagaia. "THE NEED FOR IMPROVEMENT OF FUNGICIDES RESIDUAL QUANTITIES CONTROL METHODS IN THE CONDITIONS OF THE DOMESTIC REGULATORY BASE HARMONIZATION." Wiadomości Lekarskie 75, no. 10 (2022): 2455–61. http://dx.doi.org/10.36740/wlek202210126.

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The aim: To develop highly sensitive analytical methods for the determination of the systemic phenylamide class fungicide – Metalaxyl-M residues in watermelons and grapes to reduce the risk of hazardous effects on workers’ and public health. Materials and methods: Conditions for Metalaxyl-M detection by gas-liquid chromatography (GLC) using a chromatographic capillary column SH-Rxi-5ms (length – 30 m, inner diameter – 0.25 mm, layer thickness – 0.25 μm) were determined. The optimal conditions for chromatography of Metalaxyl-M were established: column thermostat temperature – 220°С, evaporator temperature – 260 °С, detector temperature – 280 °С. The retention time under these conditions was 3,384 ± 0.1 minutes. The linear detection range is 0.01 to 0.05 mg / kg. The calibration dependence of the tested substance peak area on its concentration was established and described by the linear regression equation. Results: We found that the most sensitive method for chromatography of Metalaxyl-M is the method of using a capillary column SH-Rxi-5ms on a gas chromatograph Shimadzu Nexis 2030. Conclusions: The developed GC methods correspond to modern requirements, are selective and allow to control the Metalaxyl-M content in the matrices of the studied crops and can be used as a marker of the safety of agricultural products grown with fungicides containing Metalaxyl-M application. We found that the most sensitive method for Metalaxyl-M chromatography detection is the method with usage of a capillary column SH-Rxi-5ms on a gas chromatograph Shimadzu Nexis 2030.

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29

Yatsenko, Larisa Anatolyevna, Maria Yurevna Printseva, Ilya Danilovich Cheshko, and Artur Alexandrovich Tumanovsky. "Detection of residues and determination of the composition of combustible components in case of explosions of vapor-gas-air mixtures." Technology of technosphere safety 97 (2022): 51–60. http://dx.doi.org/10.25257/tts.2022.3.97.51-60.

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Introduction. Liquefied hydrocarbon gases (LHG) are widely used in various fields. The main components of LHG are: propane, isobutane and n-butane, which are not only combustible, but also explosive gases capable of detonation combustion. The detection of LHG in the air is a very urgent task in expert studies. To determine the component composition of various flammable liquids, for the purpose of their identification, chromatographs equipped with a capillary quartz column with a phase that allows detecting saturated hydrocarbons of the homologous series from pentane to pentatetracontane inclusive are used in the Forensic Expertise Institutions of Federal Fire Service of EMERCOM of Russia. However, it is not possible to analyze the component composition of lighter hydrocarbons according to the previously proposed and used in expert practice method for detecting and studying flammable liquids/high liquids under these conditions. To solve the problem of unification of the use of the instrumental base for the detection of residues of flammable liquids, liquid liquids and light hydrocarbons, new chromatography conditions were selected using the existing equipment set. Goals and objectives. The aim of the study is to select the analysis conditions for detecting the remains of liquefied hydrocarbon gases after explosions of steam-air mixtures on the basis of the instrumental gas chromatographic complex in service with the Forensic Expertise Institutions of Federal Fire Service of EMERCOM of Russia. Research methods. To detect and determine the composition of residues of combustible components during explosions of vapor-gas-air mixtures, a hardware-software instrumental complex based on a gas-liquid chromatograph equipped with a flame ionization detector, a ZB-50 capillary column, and an attachment from a two-stage thermal desorber was used. Results and its discussion. In the course of the study, the optimal conditions for conducting gas chromatographic analysis were defined and selected in order to detect liquefied hydrocarbon gases. Recommended pressures are given for various carrier gases. It is shown that, by varying the pressure and inlet temperature, light hydrocarbons propane, butane, isobutane is fairly well separated on a gas-liquid chromatograph with a flame ionization detector and on a ZB-50 capillary column 30 meters long. Conclusion. The research shows that the problem of combining a hardware-software instrumental complex based on a gas chromatograph with an attachment from a two-stage thermal desorber used for the analysis of two groups of substances (liquefied hydrocarbons and flammable liquids, gas liquids) is solved by varying the pressure and temperature of the input. Keywords: gas-liquid chromatography, thermal desorption, liquefied petroleum gases, light hydrocarbons, air-fuel mixtures, vapor-gas-air mixtures, explosion, fire examination.

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30

Kataev, S. S., O. N. Dvorskaya, M. A. Gofenberg, A. V. Labutin, and A. B. Melentyev. "ANALYTICAL FEATURES OF SYNTHETIC MDMB(N)-073F CANNABIMIMETICS AND ITS MARKERS IN BIOLOGICAL MATERIAL." Pharmacy & Pharmacology 7, no. 4 (September 10, 2019): 184–97. http://dx.doi.org/10.19163/2307-9266-2019-7-4-184-197.

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The aim of the research is to study both analytical features of synthetic MDMB(N)-073F cannabimimetics of indazole carboxamides group by gas chromatography methods combined with tandem mass spectrometry (GC-MS) and high performance liquid chromatography with high-resolution mass spectrometry (HPLC-HRMS) as well as characteristics of the major MDMB(N)-073F metabolite, its glucuronide and derivatives, using gas chromatography with mass-spectrometric (GC-MS) detection and high-performance liquid chromatography (HPLC) with MS/MS mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expert practice, chemical-toxicological and forensic and chemical analyses.Materials and methods. To carry out the study, the following materials were used: plant-based objects with narcotic drugs withdrawn from illegal trafficking and applied to them;. urine samples to be studied under chemical-toxicological and forensic and chemical analyses. For solid-phase epitaxy, SampliQ EVIDEX TFE cartridges – 200 mg – 3 ml (Agilent, USA) were used for sample preparation; β-glucuronidase, Type HP-2, From Helix Pomatia, 100000 UA/ml (Sigma-ALDRICH CHEMI, Germany) was used for enzymatic hydrolysis. GC-MS/MS analysis was made using Agilent 7890 gas chromatograph with a tandem quadrupolar mass-spectrometer Agilent 7000 (Agilent, США); GC-MS analysis was carrid out using gas chromatograph Agilent 7820 with mass-selective detector Agilent 5975 (Agilent, USA); HPLC-HRMS research was made on liquid chromatograph Agilent 1260 with tandem hybrid high-resolution quadrupole-time-of-flight detector Agilent 6540 (Agilent, США); liquid chromatograph Agilent 1260 with Agilent 6460 (Agilent, USA) with tandem mass-spectrometer were used for making HPLC-MS/MS research.Results. The structure of MDMB(N)-073F compound has been confirmed and an exact mass of the protonated molecule corresponding to the chemical formula C19H27FN3O3 fixed by GC-MS/MS and HPLC-HRMS methods. Spectral characteristics of MDMB(N)-073F have been given. One of the branches in MDMB(N)-073F biotransformation in the human body found out by GC-MS and HPLC-MS/MS methods, is the ester decomposition with further conjugation of the resulting acid. The product interacting with glucuronic acid, is found to be the conjugate of major MDMB(N)-073F metabolite of the Ist phase in biotransformation. Metabolites appearing due to the ester decomposition and its conjugate with glucuronic acid, are recommended to be used as markers for synthetic MDMB(N)-073F cannabimimetics in the analysis by chromatographic methods; they can be used for regular screening of biological samples.Conclusion. The research results presented here, are the following: the analytical features characteristic for synthetic MDMB(N)-073F cannabimimetics found out by gas chromatography methods combined with tandem mass spectrometry (GC-MS/ MS) and liquid chromatography of hybrid high-resolution quadrupole-time-of-flight mass spectrometry (HPLC-HRMS), as well as characteristics of major MDMB(N)-073F metabolite, its glucuronide and derivatives with the use of gas chromatography with mass-spectrometric detection (GC-MS) and liquid chromatography combined with tandem mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expert practice, chemical-toxicological, forensic and chemical analyses.

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31

Chittim, B. G., J. A. Madge, and S. H. Safe. "Pentachlorodibenzofurans: Synthesis, capillary gas chromatography and gas chromatographic/mass spectrometric characteristics." Chemosphere 15, no. 9-12 (January 1986): 1931–34. http://dx.doi.org/10.1016/0045-6535(86)90486-8.

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32

Dondelinger, Robert M. "Gas Chromatography Systems." Biomedical Instrumentation & Technology 46, no. 5 (September 1, 2012): 375–79. http://dx.doi.org/10.2345/0899-8205-46.5.375.

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33

Marriott, Philip J., Sung-Tong Chin, Bussayarat Maikhunthod, Hans-Georg Schmarr, and Stefan Bieri. "Multidimensional gas chromatography." TrAC Trends in Analytical Chemistry 34 (April 2012): 1–21. http://dx.doi.org/10.1016/j.trac.2011.10.013.

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34

Baba, S. "Radio-gas chromatography." Journal of Chromatography B: Biomedical Sciences and Applications 492 (August 1989): 137–65. http://dx.doi.org/10.1016/s0378-4347(00)84467-9.

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35

Janák, Jaroslav. "Capillary gas chromatography." Journal of Chromatography A 756, no. 1-2 (December 1996): 310–11. http://dx.doi.org/10.1016/s0021-9673(96)00714-5.

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36

Paul Jasmine, J. A., T. Sundari, and V. Balakrishnan. "Phytochemical analysis of Gloriosa superba L. Using GC-MS from five different ecotypes of Tamil Nadu State, India." Current Botany, February 8, 2020, 1–6. http://dx.doi.org/10.25081/cb.2020.v11.6048.

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Gloriosa superba L is an important medicinal plant and its seeds, tubers are used for medicine. To investigate the phyto-components of Gloriosa superba L collected from various habitats of Tamil Nadu state, India. In the present study, the phyto-components from the tubers of Gloriosa superba L cultivars from Sirumalai (GA1) Mulanoor (GA2), Thuraiyur (GA3), Konganapuram (GA4) and Vedaranyan (GA5) were extracted by ethanolic extract and the composition of chemicals and its concentration in the tubers were determined by Gas Chromatography – Mass spectrometry (GC-MS) analysis.Among the phyto-components GA1 shows 15 phyto-components, GA2 shows 13 phyto-components, GA3 shows that 8 phyto-components, GA4 shows 14 phyto-components and GA5 shows 13 phyto-components. GA1, GA2, GA4 and GA5 ecotypes possessed higher phyto-components. Colchichine is an important alkaloid of Gloriosa superba L was found in GA2, GA3, GA4 and GA5 accessions in good concentration. The results reveals that the geographical origin and climate condition of a accession causes polymorphisms in the accumulation of phyto-components, its composition and morphological traits in Gloriosa Superba L originating from different ecotypes of Tamil Nadu state.

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37

Baugh, P. J. "GAS CHROMATOGRAPHY." A-to-Z Guide to Thermodynamics, Heat and Mass Transfer, and Fluids Engineering g (2006). http://dx.doi.org/10.1615/atoz.g.gaschr.

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38

"Gas chromatography." Choice Reviews Online 50, no. 07 (February 26, 2013): 50–3860. http://dx.doi.org/10.5860/choice.50-3860.

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39

"Gas chromatography." Journal of Chromatography A 784, no. 1 (September 1997): B295—B314. http://dx.doi.org/10.1016/s0021-9673(00)89100-1.

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40

"Gas chromatography." Journal of Chromatography A 783, no. 1 (March 1997): B53—B73. http://dx.doi.org/10.1016/s0021-9673(00)89105-0.

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41

"Gas chromatography." Journal of Chromatography A 748, no. 1 (September 1996): B294—B318. http://dx.doi.org/10.1016/s0021-9673(00)89109-8.

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42

"Gas chromatography." Journal of Chromatography A 747, no. 2 (June 1996): B174—B190. http://dx.doi.org/10.1016/s0021-9673(00)89113-x.

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43

"Gas chromatography." Journal of Chromatography A 714, no. 1 (September 1995): B308—B333. http://dx.doi.org/10.1016/s0021-9673(00)80002-3.

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44

"Gas chromatography." Journal of Chromatography A 714, no. 2 (December 1995): B430—B451. http://dx.doi.org/10.1016/s0021-9673(00)80006-0.

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45

"Gas chromatography." Journal of Chromatography A 714, no. 2 (December 1995): B501—B506. http://dx.doi.org/10.1016/s0021-9673(00)80011-4.

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46

"Gas chromatography." Journal of Chromatography A 713, no. 2 (June 1995): B188—B208. http://dx.doi.org/10.1016/s0021-9673(00)80016-3.

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47

"Gas chromatography." Journal of Chromatography A 713, no. 1 (March 1995): B54—B82. http://dx.doi.org/10.1016/s0021-9673(00)80025-4.

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48

"Gas chromatography." Journal of Chromatography A 747, no. 1 (March 1996): 44–72. http://dx.doi.org/10.1016/s0021-9673(00)80030-8.

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"Gas chromatography." Journal of Chromatography A 748, no. 2 (December 1996): B410—B424. http://dx.doi.org/10.1016/s0021-9673(00)80034-5.

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"Gas chromatography." Journal of Chromatography A 748, no. 2 (December 1996): B484—B489. http://dx.doi.org/10.1016/s0021-9673(00)80039-4.

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