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Relevant bibliographies by topics / GC MS And FTIR

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Academic literature on the topic 'GC MS And FTIR'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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Journal articles on the topic "GC MS And FTIR"

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Oguchi, Rimiko, Ayako Shimizu, Satoru Yamashita, Kenji Yamaguchi, and Philip Wylie. "Polymer analysis using pyrolysis-GC-FTIR-MS and GC-AED." Journal of High Resolution Chromatography 14, no. 6 (1991): 412–16. http://dx.doi.org/10.1002/jhrc.1240140612.

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Kubwabo, C., B. Rollmann, and B. Tilquin. "Analysis of Alkaloids fromPhysalis peruvianaby Capillary GC, Capillary GC-MS, and GC-FTIR." Planta Medica 59, no. 02 (1993): 161–63. http://dx.doi.org/10.1055/s-2006-959634.

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Nikiforov, Alexej, Leopold Jirovetz, Gerhard Buchbauer, and Vittorio Raverdino. "GC-FTIR and GC-MS in odour analysis of essential oils." Mikrochimica Acta 95, no. 1-6 (1988): 193–98. http://dx.doi.org/10.1007/bf01349751.

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Fröhlich, O., C. Kahre, and P. Schreier. "GC-FTIR-MS for the analysis of volatiles." Fresenius' Zeitschrift für analytische Chemie 324, no. 3-4 (1986): 314. http://dx.doi.org/10.1007/bf00487955.

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Pranoto and Mazlan. "The characterization of pyrolysis oil from plastic waste using FTIR and GC-MS techniques." IOP Conference Series: Earth and Environmental Science 1268, no. 1 (2023): 012058. http://dx.doi.org/10.1088/1755-1315/1268/1/012058.

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Abstract This research aims to investigate the characterization of pyrolysis oil products derived from plastic waste using FTIR (Fourier Transform Infrared) and GC-MS (Gas Chromatography-Mass Spectrometry) techniques. Plastic waste samples were subjected to pyrolysis, and the resulting pyrolysis oils were analyzed using FTIR to identify the functional groups present in the oil product. Additionally, GC-MS analysis was performed to obtain detailed information about the composition of the pyrolysis oils. The FTIR spectra revealed the presence of various functional groups, indicating the complexity of the pyrolysis oil composition. The functional groups identified in the pyrolysis oil included methyl C-H stretch and C-C stretch. The GC-MS analysis provided insights into the specific compounds present in the pyrolysis oils. The results demonstrate the potential of pyrolysis as a method for converting plastic waste into valuable oil products. The characterization of these products using FTIR and GC-MS techniques provides valuable information for further optimization and utilization of pyrolysis oil derived from plastic waste.

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., Amala jeyakumar J. Karuppusamy Sand Pannerselvam N. "PHYTOCHEMICAL ANALYSIS OF HALIMEDA MACROLOBA FROM GULF OF MANNAR BIOSPHERE RESERVE, SOUTHERN INDIA." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES o6, no. 08 (2019): 14402–7. https://doi.org/10.5281/zenodo.3361360.

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<em>Halimeda macroloba (Chlorophyceae) a green alga was subjected for phytochemical analysis by GC-MS and FTIR spectroscopy methods. GC-MS has recorded the presence of eight peaks among them 3,7,11,15-Tetramethyl-2-hexadecen-1-ol (phytol), hexadecanoic acid, N- hexadecanoic acid, 1-Hexyl-2-nitrocyclohexane and  β-sitosterol are major compounds. FTIR analysis has down and the presence of various phytochemicals  such as alkane, aldehyde, aromatic, methyl and aliphatic compounds . The present study highlighted the  presence of phytocompound from the marine alga H.macroloba can be used for biological and pharmacological studies.</em> <strong><em>Keywords</em></strong><em>: Seaweed, Halimeda macroloba , bioactive compound, GC-MS, FTIR.</em>

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Ouyang, Xiao Dong, Shi Bao Dong, Li Ming Hu, and Zhi Min Zong. "Analysis of Acetone Extract From Shenfu by GC/MS and FTIR." Advanced Materials Research 356-360 (October 2011): 1285–88. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.1285.

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The acetone extracts from Shenfu coal (SFC) of China was filtered into filtrate and cake, and analyzed by GC/MS and FTIR respectively. The results indicate that: The GC/MS identifiable fraction mainly consists of polycyclic aromatics with 2-4 rings and their alkyl derivatives as main components, and polar oxygen compounds with ketones and esters as main components. A variety of nitrogen compounds and several compounds containing phosphor, sulfur, and chlorine were identified. IR spectrum shows that functional groups including hydroxyl, carbonyl, polycyclic aromatic ring, methylene, methyl, etc. are among the main groups of GC/MS unidentified fraction.

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Zavahir, Junaida Shezmin, Jamieson S. P. Smith, Scott Blundell, et al. "Relationships in Gas Chromatography—Fourier Transform Infrared Spectroscopy—Comprehensive and Multilinear Analysis." Separations 7, no. 2 (2020): 27. http://dx.doi.org/10.3390/separations7020027.

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Molecular spectroscopic detection techniques, such as Fourier transform infrared spectroscopy (FTIR), provides additional specificity for isomers where often mass spectrometry (MS) fails, due to similar fragmentation patterns. A hyphenated system of gas chromatography (GC) with FTIR via a light-pipe interface is reported in this study to explore a number of GC–FTIR analytical capabilities. Various compound classes were analyzed—aromatics, essential oils and oximes. Variation in chromatographic peak parameters due to the light-pipe was observed via sequentially-located flame ionization detection data. Unique FTIR spectra were observed for separated mixtures of essential oil isomers having similar mass spectra. Presentation of GC×FTIR allows a ‘comprehensive’-style experiment to be developed. This was used to obtain spectroscopic/separation profiles for interconverting oxime species with their individual spectra in the overlap region being displayed on a color contour plot. Partial least square regression provides multivariate quantitative analysis of co-eluting cresol isomers derived from GC–FTIR data. The model resulted in an R2 of 0.99. Prediction was obtained with R2 prediction value of 0.88 and RMSEP of 0.57, confirming the method’s suitability. This study explores the potential of GC–FTIR hyphenation and re-iterates its value to derive unambiguous and detailed molecular information which is complementary to MS.

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Jian-Qin, Cu, Zhang Zheng-Ju, Pu Fan, Francis Perineau, Michel Delmas, and Antoine Gaset. "GC/MS and GC/FTIR Analysis of the Essential Oil of Celery Seed." Journal of Essential Oil Research 2, no. 1 (1990): 1–5. http://dx.doi.org/10.1080/10412905.1990.9697808.

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Nilsson, Maritha, Åsa Ingemarsson, Jörgen R. Pedersen, and Jim O. Olsson. "Slow pyrolysis of birch (Betula) studied with GC/MS and GC/FTIR/FID." Chemosphere 38, no. 7 (1999): 1469–79. http://dx.doi.org/10.1016/s0045-6535(98)00347-6.

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Dissertations / Theses on the topic "GC MS And FTIR"

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O'Mahoney, T. Karl P. "An investigation of perfluorocarbons and bromofluorosilanes : pyrolysis, GC-ECD, GC-MS, FTIR and microwave spectroscopic studies and analysis." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259467.

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Bornholm, Johanna. "Egyptens balsameringsteknik : en kemisk analys av organiska lämningar." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-87213.

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This paper deals with the embalming process in ancient Egypt. Samples were collected from six objects from Medelhavsmuseet in Stockholm. The objects were one supposed ladle and five different contents from pottery. Fourier transform infrared spectrometry (FTIR) and gas- chromatography/mass spectrometry was used to characterize the components of the materials. The result was then correlated with previously made analysis of embalming materials to discover similarities. The results show complex mixtures mainly consisting of resin from Pinaceae origin, also beeswax, vegetable oil and Castor oil. Some samples show differences in the mixture, one dominated by cholesterylacetat. The results of the ladle samples is comparable to previous samples from other analysis and can therefore be confirmed as an embalming ladle.

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Wong, Kevin Anthony. "Screening for Acrylamide Levels in French Fries Using Portable Vibrational Spectrometers." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492087222396921.

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Redigolo, Marcelo Miyada. "Caracterização química multitécnicas de tintas artísticas brasileiras, um estudo de caso." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-30012019-125116/.

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O presente trabalho apresenta a caracterização química de tintas artísticas brasileiras. Diferente de outras matrizes, os materiais de arte fabricados no Brasil não apresentam informações na literatura que auxiliem em sua conservação e restauração. Amostras de tintas acrílicas e a óleo, nacionais e importadas, foram analisadas pelas técnicas espectroscópicas Raman e infravermelho por transformada de Fourier (FTIR), pirólise acoplada a cromatografia a gás e espectrometria de massas (Py-GC/MS) e microscopia eletrônica de varredura acoplada a espectrometria de fluorescência de raios X (SEM-EDS). Resultados de análise indicam que tintas acrílicas brasileiras são compostas por poliestireno (PS), diferentemente das importadas, compostas por polimetilmetacrilato (PMMA). Enquanto as tintas a óleo apresentam composição semelhante (óleo de linhaça), brasileiras e importadas. Duas pinturas do acervo da Pinacoteca do Estado de São Paulo foram selecionadas para um estudo de caso. As obras apresentam a formação de exsudatos em sua superfície, o que demanda a caracterização química como etapa anterior ao desenvolvimento de uma metodologia de restauração. A obra \"Mandala da saudade\", de Sara Goldman-Belz, é composta por tinta spray (alkyd) e a obra \"Três pessoas\", de Marina Saleme, por tinta a óleo. Os resultados de análise apresentam um primeiro passo no estabelecimento de um banco de dados de materiais artísticos fabricados no Brasil para fins de restauração e perícia criminal de obras de arte.<br>The current work presents the chemical characterization of Brazilian artistic paints. Differently from other matrices, art materials produced in Brazil lack for information in literature that help in their conservation and restoration. Acrylic and oil paint samples, Brazilian and imported, were analyzed by Raman and Fourier transform infrared (FTIR) spectroscopies, pyrolysis coupled with gas chromatography and mass spectrometry (Py-GC/MS) and scanning electron microscopy coupled with x-ray fluorescence spectrometry (SEM-EDS). Results indicate that Brazilian acrylic paints are composed of polystyrene (PS), differently from imported ones, composed of polymethyl methacrylate (PMMA). Whereas, oil paints present similar composition (linseed oil), Brazilian and imported. Two paintings from the collection of Pinacoteca do Estado de São Paulo were selected for a case study. Both works of art present formation of exudates on their surface, which demands chemical characterization as a previous step to the development of a restoration methodology. The painting \"Mandala da saudade\", by Sara Goldman-Belz, is composed of spray paint (alkyd) and the painting \"Três pessoas\", by Marina Saleme, is composed of oil paint. Results presented in this thesis are the first step towards the establishment of a database for artistic materials produced in Brazil for purposes of art restoration and forensic science.

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El-rachidi, Mariam. "Étude cinétique et mécanistique des réactions hétérogènes du folpel et du dimethomorphe avec l'ozone et les radicaux OH. Photooxydation homogène des composés morpholiniques avec les radicaux OH." Thesis, Reims, 2012. http://www.theses.fr/2012REIMS011.

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Cette thèse porte sur la détermination des constantes cinétiques de la dégradation hétérogène de pesticide (folpel et diméthomorphe) par l'ozone et les radicaux OH en utilisant un réacteur photo-chimique couplé à un système GC/MS. Le (4-chlorophenyl)(3,4-dimethoxyphenyl)methanone (CPMPM), est identifié par SPME/GC/MS comme produit de dégradation hétérogène du diméthomorphe par les radicaux OH comme par l'ozone. La réactivité hétérogène du CPMPM vis-à-vis de l'ozone et les radicaux OH est également étudiée. Les résultats obtenus montrent que les valeurs des constantes cinétiques varient entre 10-20 et 10-19 cm3.molécules-1.s-1 vis-à-vis de l'ozone, et entre 10-14 et 10-12 cm3.molécules-1.s-1 vis-à-vis des radicaux OH. Ces valeurs impliquent des durées de vie atmosphériques de l'ordre de quelques jours à quelques mois. Par conséquent les composés étudiés sont relativement persistants et peuvent être transportés vers des régions éloignées de leur point d'application.Les spectres UV et la réactivité homogène vis-à-vis des radicaux OH du N-formylmorpholine (NFM), produit gazeux attendu de la dégradation du diméthomorphe, et de deux autres composés gazeux, la morpholine et le N-acétylmorpholine (NAM), ont été déterminés. Les études cinétiques ont été réalisées dans une chambre atmosphérique couplée à un spectromètre IR. Les résultats obtenus montrent que les composés étudiés ne sont pas sensibles à la photolyse dans l'atmosphère et que leur réactivité vis-à-vis des radicaux OH est élevée. En général, les durées de vie atmosphériques de ces composés sont de l'ordre de quelques heures ; ils sont donc non-persistants dans l'atmosphère<br>The research study discussed in this thesis concerns the determination of the kinetic rate constants of the heterogeneous degradation of pesticides folpet and dimethomorph by ozone and OH-radicals using the technique of a simulation chamber coupled to a GC/MS analytical system. The study also involves the identification of the degradation products of the analyzed compound in the condensed phase using SPME/GC/MS. The heterogeneous OH and O3-reactivities of the identified degradation product of dimethomorph, (4-chlorophenyl)(3,4-dimethoxyphenyl)methanone (CPMPM), are also evaluated experimentally. The obtained results show that the rate constant values of the analytes are in the order of 10-20-10-19 and 10-14-10-12 cm3.molecule-1.s-1 relative to heterogeneous O3 and OH-oxidation, respectively. Such values implicate tropospheric life-times that vary from a few days to several months, meaning that these compounds are relatively persistent and may be transported to regions far from their point of application.The UV-absorption spectra and homogeneous OH-reactivities of the expected degradation product of dimethomorph in the gas phase, N-formylmorpholine (NFM), and two other gaseous compounds, morpholine and N-acetylmorpholne (NAM) are also studied. The results show that these compounds are not susceptible to photolysis in the atmosphere and that they exhibit strong reactivity towards OH-radicals. Generally speaking, their atmospheric life-times are in the order of a few hours and thus they are non-persistent

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Weijland, Elin, and Therese Rindberg. "Färgkomponenter som avgår vid bandlackering." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20786.

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<p>På SSAB i Borlänge har man upptäckt att avgaser från färgen förorenar ugnarna vid härdning. Avgaserna består av lösningsmedel och andra flyktiga föreningar som sedan förkolnas och faller ner på lackerade plåtband. För att komma runt det här problemet har SSAB tillsammans med Akzo Nobel Industrial Finishes AB, i Gamleby, tillverkat en färg som inte ska ge ifrån sig något lösningsmedel och på så sätt minska bildandet av föroreningar i ugnarna. Färgen heter NOVA GreenCoat och innehåller rapsmetylester, RME, som är ett reaktivt lösningsmedel och ska binda till bindemedlet i färgen och på så sätt hindras från att avgå vid härdning.</p><p>Syftet har varit att undersöka om en viss metod fungerar bra för att samla upp avgaser vid härdning. Avgaserna analyserades med GC-MS och härdningen studerades med FTIR. Arbetet har utförts både i Borlänge och i Gamleby.</p><p>Metoden för uppsamling av avgaserna visade sig fungera, dock inte särskilt effektivt. Den skulle därför behöva optimeras.</p><p>Härdningen kunde till viss del följas med hjälp av FTIR. Förändring i IR-spektrumet syntes för hydroxyltoppen vid cirka 3500 cm<sup>-1</sup>. En skillnad kunde ses för en topp vid 2858 cm<sup>-1</sup> som uppkom i det ohärdade materialet innehållande RME, men den försvann under härdning. Toppen ökade med ökad mängd RME och syntes inte alls för de prover som inte innehöll RME.</p><p>Samtliga gjorda analyser indikerade att RME avgick vid härdning. Vid analys med GC-MS kunde de föreningar som avgick från RME identifieras som: metyl-14-metyl pentadekanoat och/eller metyl hexadekanoat, olika former av metyl oktadekanoat samt olika former av metyl eikosanoat. Andra föreningar från klarlacken som avgick var lösningsmedel x och y samt i två av proverna hexametoximetylmelamin, HMMM.</p><br><p>Problems with exhaust gases from paint that contaminates the ovens have been discovered at SSAB in Borlänge. The exhaust gases contain solvents and other volatiles that vaporize from the paint and later on carbonize and fall down on the next coming sheets. SSAB and Akzo Nobel Industrial Finishes AB have developed a paint that is not supposed to vaporize any solvents and therefore reduce the contaminations of the ovens. The paint is called NOVA GreenCoat and contains rapeseed methyl ester, RME. RME is a reactive solvent that is supposed to react with the binder in the paint and therefore be prevented from leaving during thermal cure.</p><p>The purpose was to investigate whether a specific method worked well, for collecting the exhaust gases during thermal cure, or not. The collected exhaust gases were analyzed by using GC-MS and the cure was studied with FTIR. The work was executed both in Borlänge and Gamleby.</p><p>The method for collecting the exhaust gases worked, unfortunately it wasn’t particularly effective. It therefore needs to be optimized.</p><p>The cure could partially be studied by using FTIR. Changes in the IR-spectrum could be followed by looking at the hydroxyl peak at approximately 3500 cm<sup>-1</sup>. A certain difference was observed for a peak at 2858 cm<sup>-1</sup> that appeared in the uncured material containing RME. The peak disappeared during cure. It increased with increased amount of RME and could not be observed at all for the samples that did not contain RME.</p><p>All the analyzed samples indicated that RME vaporize during cure. When analyzed with GC-MS the volatiles that vaporize from RME were identified as: hexadecanoic acid methyl ester and/or penta decanoic acid methyl-14-methyl ester, different forms of octadecanoic acid methyl ester and different forms of eicosanoic acid methyl ester. Other volatiles that vaporize from NOVA GreenCoat were solvent x and solvent y and for two of the samples hexa metoxy methyl melamine, HMMM, was also found.</p>

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Pappas, Adlerburg Nickolas. "Unwrapping the Past : A chemical analysis of context lacking artefacts from the Ptolemaic and Roman Egypt in correlation with the process of mummication." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-100019.

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This paper deals with the chemical identification of artefacts correlated with the process of ancient Egyptian mummification dating to the Graeco-Roman period. The samples were harvested from two artefacts belonging to the Museum of Mediterranean and Near Eastern Antiquities in Stockholm. The original description of the said samples defined them, as natron filled linen bags and bee product (honey?). To identify the true nature of the samples, advanced methods such as Fourier transform infrared spectrometry (FTIR), gas chromatography/mass spectrometry and powder X-ray Diffractometry were used. The results were correlated with previous made analyses regarding embalming materials to discover similarities. Furthermore, the research revealed that the previous sample identifications were false, while providing hypotheses based on the new results.

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Azemard, Clara. "Photodégradation des résines naturelles : application au domaine artistique." Thesis, Avignon, 2014. http://www.theses.fr/2014AVIG0255/document.

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Cette thèse porte sur la dégradation photochimique des résines naturelles utilisées dans la fabrication de vernis à tableaux. Différentes résines ont été choisies pour notre étude : la sandaraque, le copal de Manille, la colophane, le mastic et la dammar. Des vernis à tableaux ont été fabriqués à partir de ces résines dissoutes dans de l’alcool, de l’huile ou de l’essence de térébenthine selon d’anciennes recettes. Ils ont par la suite été vieillis artificiellement en enceinte d’irradiation. L’étude en spectrométrie infrarouge a permis de montrer qu’une identification du type de résine était possible par cette technique. De nombreuses bandes d’absorption spécifiques ont été mises en évidence mais tendent à disparaître tout au long du photovieillissement. Néanmoins, la bande des CH (2850-3050 cm-1) permet de séparer les résines diterpéniques et triterpéniques, et l’analyse en composante principale des données permet d’affiner les identifications. Les analyses en CPG-SM nous ont permis d’identifier la plupart des molécules présentes au sein de nos vernis grâce à l’étude des fragmentations en spectrométrie de masse. Dans ce cadre, une étude poussée du comportement des molécules a été effectuée, notamment par des expériences en SM/SM. Quatre phénomènes de photodégradation ont été observés : l’isomérisation, la scission, l’hydroxylation et l’oxydation de type Norrish I des terpènes présents. Le choix du solvant utilisé dans la fabrication du vernis influence fortement la composition du vernis et sa cinétique de dégradation, en particulier dans le cas d’un vernis à l’huile. La présence d’une vitre devant le vernis a également une influence, plus ou moins importante, sur les mécanismes photochimiques. Des vernis anciens récupérés auprès de conservateurs-restaurateurs ont été identifiés grâce à la base de données effectuée à partir de nos expérimentations, validant notre méthodologie. Les premiers essais de polymères à empreinte moléculaire ont également été effectués donnant des résultats encourageants pour l’étude de mélanges de terpènes<br>This thesis presents a study on the photochemical degradation of natural resins used in the manufacture of painting varnishes. Following the literature, five resins were chosen for our experiments: sandarac, Manila copal, colophony, mastic and dammar. Varnishes were made from those resins dissolved in alcohol, oil or turpentine spirit, as found in old recipes. They were then photo-aged by irradiation under artificial light. The study by infrared spectrometry enabled the identification of the type of resin. Although various specific absorption bands were highlighted, they tend to disappear all along the photoageing process. Nevertheless, the C-H band situated between 2850 and 3050 cm-1 allows to separate diterpenic and triterpenic resins and the analysis by principal components can help the identification. Thanks to the study by GC-MS we could identify most of the molecules present in our varnishes by developing the fragmentation study in mass spectrometry. An advanced study of the molecules behaviour was done, especially by MS/MS experiments. Four photo-degradation reactions were observed: isomerisation, cleavage, hydroxylation and Norrish I oxidation of the terpenoids. The choice of the solvent used in the varnish can affect its composition and degradation kinetic, mostly for oil varnishes. Besides, a window pane placed before the varnish will influence the photochemical mechanisms. Ancient varnishes collected by conservator-restorers were analysed and identified thanks to the database elaborated from our results, validating our methodology. The first experiments of molecularly imprinted polymers were carried out with some encouraging results for the analysis of mixed terpenoids

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Ueberlein, Susanne. "Isolierung und Charakterisierung der Chitin-basierten Skelette der marinen Schwämme Aplysina cavernicola und Ianthella basta." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-195713.

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Die Schwammskelette der Ordnung Verongida zeichnen sich durch das Fehlen mineralischer Komponenten aus. Stattdessen bestehen sie aus Spongin, einem kollagenartigen Protein, und Chitin. Im Rahmen der vorliegenden Arbeit wurden die aus solch einem Chitin-Protein-Komplex bestehenden Skelette der Schwammspezies Aplysina cavernicola und Ianthella basta aus der Ordnung Verongida untersucht. Aufgrund ihrer morphologischen Unterschiede wurde für jede Schwammart eine eigene Methode zur Isolierung der Schwammskelette entwickelt. Die isolierten Skelette konnten anschließend mit verschiedenen Methoden wie REM, ATR-FTIR-Spektroskopie und NMR-Spektroskopie charakterisiert werden. Weiterhin wurde eine Methode zur Extraktion und Analyse der in den Skeletten befindlichen Aminosäuren mittels GC-MS entwickelt. Die Untersuchungen zeigten deutlich, dass es sich bei Spongin um ein kollagenartiges und halogeniertes Protein handelt, welches je nach Schwammart Unterschiede in der Aminosäurezusammensetzung aufweist. Darüber hinaus gelang es zum ersten Mal das Chitin aus dem Chitin-Protein-Komplex mittels Phosphorsäure zu entfernen. Aus den gewonnenen Erkenntnissen konnte abschließend ein Modell zum Aufbau des Chitin-Protein-Komplexes in der Schwammspezies Aplysina cavernicola entwickelt werden.

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Sleiman, Chantal. "Réactivité chimique en phase gazeuse de molécules organiques d’intérêt atmosphérique et astrophysique." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S104/document.

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Cette thèse reporte l'étude expérimentale de la cinétique en phase gazeuse de plusieurs réactions d'intérêt atmosphérique et astrophysique. La connaissance des constantes de vitesse de ces réactions est utile à la compréhension des processus de synthèse et de destruction des molécules dans l'atmosphère terrestre et dans le milieu interstellaire. Sur le plan atmosphérique, nous avons étudié les réactions d'une série d'hydroxycétones, une sous-famille de COV carbonylés, (4-hydroxy-2-butanone, 3-hydroxy-3-méthyl-2-butanone and 4-hydroxy-4-méthyl-2-pentanone) avec le radical OH et l'atome de Chlore Cl afin de définir leur devenir atmosphérique. Nous avons déterminé les constantes de vitesse des réactions de ces hydroxycétones avec le radical OH en absolue à température ambiante et en fonction de la pression en utilisant la cellule cryogénique couplée à la technique PLP-LIF (Photolyse à Laser Pulsé – Fluorescence Induite par Laser). Les constantes de vitesse des réactions de ces hydroxycétones avec Cl ont été mesurées en relative à température ambiante et à pression atmosphérique en utilisant les chambres de simulation atmosphérique couplées aux techniques analytiques de détection : FTIR et GC-MS. En plus, une étude mécanistique a été menée également afin d'identifier et quantifier les produits issus de ces réactions. L'ensemble des résultats obtenus est discuté et nous a permis d'évaluer les implications atmosphériques de ces hydroxycétones (durée de vie et impact sur l'environnement). Le plan astrophysique, la cinétique des réactions impliquant le radical CN et une série de molécules azotées (méthyamine, diméthylamine, triméthylamine et acétonitrile) ont été étudiés sur une large gamme de température (23 K – 354 K) en utilisant la technique CRESU (Cinétique de Réaction en Écoulement Supersonique Uniforme) et la cellule cryogénique couplées à la technique de détection PLP-LIF. Ces études expérimentales ont été accompagnées par des études théoriques afin de mieux comprendre les mécanismes réactionnels. Les éventuelles implications astrophysiques de l'ensemble de ces résultats ont fait l'objet d'une discussion détaillée<br>This thesis reports the experimental kinetic study of the gas phase reactions of atmospheric and astrophysical interests. The knowledge of the reactions rate constants is useful to understand the mechanisms of formation and destruction of molecules in the Earth’s atmosphere and in the interstellar medium. On the atmospheric side, we have studied the reactions of a series of hydroxyketones (4-hydroxy-2-butanone, 3-hydroxy-3-methyl-2-butanone and 4-hydroxy-4-methyl-2-pentanone), a large category of hydroxycarbonyls with OH radicals and chlorine atoms Cl in order to determine their atmospheric fate. We have measured the absolute rate constants of the reactions of hydroxyketones with OH radicals by using the cryogenic cell coupled to PLP-LIF technique (Pulsed Laser Photolysis - Laser Induced Fluorescence) at room temperature and as function of pressure. The relative rate constants of the reactions of the compounds investigated with Cl atoms were measured at room temperature and atmospheric pressure by using the atmospheric simulation chamber coupled to the analytical detection techniques: FTIR and GC-MS. In addition, a mechanistic study was also conducted in order to identify and quantify the products formed from these reactions. The whole results are discussed in order to assess the atmospheric implications of these hydroxyketones (lifetimes and environmental impact). On the astrophysical side, the kinetic of the reactions involving CN radical and a series of nitrogen-containing molecules (methylamine, dimethylamine, trimethylamine and acetonitrile) was studied over a wide range of temperature (23 K - 354 K) using CRESU technique (a French acronym standing for Cinétique de Réaction en Ecoulement Supersonique Uniforme) and the cryogenic cell coupled to the detection technique PLP-LIF. These experimental studies were accompanied by theoretical studies to better understand the reaction mechanisms. Possible astrophysical implications of the whole results have been discussed in this study

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Books on the topic "GC MS And FTIR"

1

McMaster, Marvin. GC/MS. John Wiley & Sons, Ltd., 2008.

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Hübschmann, Hans-Joachim. Handbook of GC-MS. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527674305.

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Michael, Gilbert, and Lothridge Kevin, eds. GC-MS guide to ignitable liquids. CRC Press, 1998.

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Halket, John M. Introduction to bench-top GC/MS. HD Science, 1990.

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Christopher, McMaster, ed. GC/MS: A practical user's guide. Wiley, 1998.

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Hübschmann, Hans-Joachim. Handbook of GC/MS: Fundamentals and applications. 2nd ed. Wiley-VCH, 2009.

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Pastor, Kristian, ed. Emerging Food Authentication Methodologies Using GC/MS. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-30288-6.

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Griffiths, Peter R. GC/FT-IR and GC/FT-IR/MS techniques for routine environmental analysis. U.S. Environmental Protection Agency, Research and Development, Environmental Monitoring Systems Laboratory, 1986.

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Griffiths, Peter R. GC/FT-IR and GC/FT-IR/MS techniques for routine environmental analysis. U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1986.

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Griffiths, Peter R. GC/FT-IR and GC/FT-IR/MS techniques for routine environmental analysis. U.S. Environmental Protection Agency, Research and Development, Environmental Monitoring Systems Laboratory, 1986.

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Book chapters on the topic "GC MS And FTIR"

1

Buchbauer, G., L. Jirovetz, and A. Nikiforov. "Use of GC-FID, GC-FTIR-MS, and Olfactory Characterisation in the Analysis of Essential Oils and Plant Extracts." In Modern Methods of Plant Analysis. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03331-9_5.

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Kawakami, M. "Comparison of Extraction Techniques for Characterizing Tea Aroma and Analysis of Tea by GC-FTIR-MS." In Modern Methods of Plant Analysis. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03331-9_11.

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Okereke, C. Stanley, O. Uche Arunsi, E. Martina Ilondu, and S. Chieme Chukwudoruo. "Herbal Extracts and Their Bioactivities: Comparative Phytoconstituent Analysis of Selected Medicinal Plants Using GC-MS/FTIR Techniques." In The Role of Phytoconstitutents in Health Care. Apple Academic Press, 2020. http://dx.doi.org/10.4324/9780429284267-3.

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Cleaves, Henderson James. "GC/MS." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_624-4.

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Cleaves, Henderson James. "GC/MS." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_624.

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Güssregen, B. "GC-MS." In Lexikon der Medizinischen Laboratoriumsdiagnostik. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49054-9_1210-1.

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Güssregen, B. "GC-MS." In Springer Reference Medizin. Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_1210.

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Cleaves, Henderson James. "GC/MS." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_624.

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James CleavesII, Henderson. "GC/MS." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65093-6_624.

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James CleavesII, Henderson. "GC/MS." In Encyclopedia of Astrobiology. Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-642-27833-4_624-5.

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Conference papers on the topic "GC MS And FTIR"

1

Bykov, Alexey, Galina Demidenko, Linda Nikoshvili, and Elena Bakhvalova. "INFLUENCE OF THE NATURE OF AROMATIC POLYMER AS A PT PARTICLE STABILIZER ON ITS ACTIVITY AND SELECTIVITY IN THE LIQUID-PHASE HYDROGENATION OF AROMATIC AND POLYAROMATIC SUBSTRATES." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/4.1/s17.16.

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A series of platinum catalytic systems stabilized in aromatic polymers were obtained in this work. Commercially available styrene-divinylbenzene (MN100) and polymers synthesized by one-stage crosslinking by the Friedel-Crafts reaction from benzene, naphthalene, and an equimolar benzene-naphthalene mixture were used as polymers. The obtained systems were tested in liquid-phase hydrogenation reactions of benzene, toluene, and benzene-toluene mixture, as well as anthracene in a dodecane medium. The reaction products were studied using GC-MS. Polymers and catalytic systems were studied using diffuse reflection IR spectroscopy, XPS, low-temperature nitrogen physisorption, thermogravimetry coupled with mass spectrometry, and TEM. The study of polymers by XPS and FTIR showed the presence of oxygen-containing functional groups with a similar nature in all polymers. The range of thermal stability of polymers was determined. The catalytic activity of 1%Pt/polymer systems in liquid-phase hydrogenation of solutions of pure benzene, toluene, and anthracene in dodecane, as well as an equimolar benzene-toluene mixture in dodecane, were compared. The dependence of the reaction rate, as well as the selectivity in the case of anthracene, on the nature of the aromatic blocks in the polymer matrix, was shown. The selectivity for cycloalkanes during hydrogenation of mononuclear arenes was 100%, regardless of substrate conversion. The selectivity of obtaining 9,10-dihydroanthracene at 90% anthracene conversion was found to be above 80% for all studied systems. In addition, the possibility of obtaining smaller diameter metal particles in the synthesized polymers in comparison with the industrial polymer MN100 was shown.

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Noramli, Nur Athirah Syafiqah, Noor Aida Syakira Ahmad Sabri, Muhammad Ikhsan Roslan, Nurlaila Ismail, Zakiah Mohd Yusoff, and Mohd Nasir Taib. "Analytical Characterization of Aquilaria Species Essential Oils Using Advanced Chromatographic Techniques Based on GC-MS and GC-FID." In 2025 21st IEEE International Colloquium on Signal Processing & Its Applications (CSPA). IEEE, 2025. https://doi.org/10.1109/cspa64953.2025.10933407.

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Frenier, W. W., and A. Iob. "Analytical Techniques Used for Identification and Quantification of Acid Corrosion Inhibitors." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88150.

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Abstract Several analytical techniques have been used for identifying components of acid corrosion inhibitors. Techniques used include FTIR (transmission and external reflectance), GC, and GPC. These methods have been used to evaluate the products formed (on the steel coupon and in the acid solution) during inhibition, which in turn helped us to establish mechanisms of inhibition. Details of the techniques used and the results found for two acid inhibitors will be discussed.

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Yoon, Namkyung, and Hwangnam Kim. "DMGAN: Bridging AI and Chemistry with Enhanced GC-MS Data Generation." In 2024 IEEE SENSORS. IEEE, 2024. https://doi.org/10.1109/sensors60989.2024.10784884.

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Gosav, Steluta, Nicoleta Paduraru, and Mirela Praisler. "Hyphenated GC-FTIR and GC-MS techniques applied in the analysis of bioactive compounds." In Second International Conference on Applications of Optics and Photonics, edited by Manuel Filipe P. C. Martins Costa and Rogério Nunes Nogueira. SPIE, 2014. http://dx.doi.org/10.1117/12.2063898.

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Wulff, Ditmar. "Investigations Into The Chromatographic Optimization Of Combined GC/FTIR/MS." In Intl Conf on Fourier and Computerized Infrared Spectroscopy, edited by David G. Cameron. SPIE, 1989. http://dx.doi.org/10.1117/12.969583.

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Zunic, Wayne M., Suyan Ding, and James R. Durig. "Pyrolysis GC/FID/FTIR, pyrolysis GC/MS, and FTIR studies of dried peat water samples differing in botanical composition and geographical location." In Luebeck - DL tentative, edited by Herbert M. Heise, Ernst H. Korte, and Heinz W. Siesler. SPIE, 1992. http://dx.doi.org/10.1117/12.56377.

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Primpke, S., M. Fischer, C. Lorenz, G. Gerdts, and B. Scholz-Boettcher. "Quantifying Microplastics in Complex Environmental Samples: Py-Gc/Ms vs. Hyperspectral Ftir – Potential and Limitations." In 30th International Meeting on Organic Geochemistry (IMOG 2021). European Association of Geoscientists & Engineers, 2021. http://dx.doi.org/10.3997/2214-4609.202134253.

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Samriani, Samriani, Hasnah Natsir, Seniwati Dali, and Abdur Rahman Arif. "Phytochemical screening, GC-MS, FTIR, and antibacterial activity of methanol extract of Caesalpinia Bonduc (L.) roxb. seeds." In PROCEEDINGS OF 5TH INTERNATIONAL CONFERENCE ON SUSTAINABLE INNOVATION IN ENGINEERING AND TECHNOLOGY 2023. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0165110.

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Aguiar, Janaina I. S., Hamidreza Samouei, and Amir Mahmoudkhani. "Uncovering Mysteries of Waxphaltenes: Meticulous Experimental Studies of Field and Lab Deposits Unveil Nature of Wax-Asphaltene Intermolecular Interactions." In SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204315-ms.

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Abstract In recent years, the utilization of modern sampling tools provided access to the field deposits from several offshore and onshore wells producing asphaltenic crudes. Compositional analysis of field deposits revealed the presence of asphaltenes and wax as major fractions, while system conditions traditionally implied precipitation and deposition of asphaltenes only. Most of the previous studies on organic deposition have been conducted with the key assumption that aggregation and precipitation of wax and asphaltene occur independently. A few researchers investigated the solubility parameter's alteration, but they did not incorporate waxes found in the oilfield deposits. This study aims to investigate the nature of "waxphaltenes"; from intermolecular interactions between asphaltenes and wax in samples collected from fields and made in the laboratory. Asphaltenes samples were extracted and fully characterized by proton nuclear magnetic resonance (NMR) and Fourier-transform infrared spectroscopy (FTIR). Paraffin waxes were identified using gas chromatography (GC), differential scanning calorimetry (DSC), NMR, and FTIR. Precipitation tests of asphaltenes with n-heptane at high temperature were performed both in the presence and absence of wax; GC, NMR and FTIR techniques evaluated the precipitates and the material dispersed in solution. It was found that asphaltenes co-precipitated with waxes even at higher temperatures than the normal wax appearance temperature (WAT) of the crude oil or the model solutions and that long and medium size paraffin waxes had higher tendencies to coprecipitate with asphaltenes than either short chain or very long chain paraffin hydrocarbons. The results also indicated that the amount of wax that co-precipitates with asphaltenes was more related to asphaltene structure but is independent of the asphaltenes or wax content. Heteroatoms played an important role in the interactions between wax and asphaltenes during precipitation and separation.

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Reports on the topic "GC MS And FTIR"

1

Alcaraz, A., and A. Dougan. Evaluating GC/MS Performance. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/1036861.

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Mulcahy, H., and C. Koester. Experiments with the LECO Pegasus Gas Chromatograph/ Time-of-Flight Mass Spectrometer Phase 1: Fast GC Separations and Comparison of the GC/TOF-MS with Conventional Quadrupole GC/MS and Fast Quadrupole GC/MS. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1056608.

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Nelson, Bryant C., Elijah J. Petersen, Pawel Jaruga, and Miral Dizdaroglu. GC-MS/MS Measurement of Nanomaterial- Induced DNA Modifications in Isolated DNA. National Institute of Standards and Technology, 2015. http://dx.doi.org/10.6028/nist.sp.1200-19.

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Chambers, D. M. PBX 9501 Outgas Analysis by SPME/GC/MS. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/792331.

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Thomson, J. S., J. B. Green, T. B. McWilliams, and S. K. T. Yu. GC/MS determination of amines following exhaustive trifluoroacetylation. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10180988.

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van Leeuwen, S. P. J., and J. de Jong. Method validation study on determination of OC-pesticides and PCBs by GC-ECD and GC-MS(/MS) in animal feeding stuffs. Wageningen Food Safety Research, 2022. http://dx.doi.org/10.18174/568478.

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Kimble, Ashley, Derek Muensterman, Liliana Cahuas, et al. Extraction and analysis of per- and polyfluoroalkyl Substances (PFAS) from Meals Ready-to-Eat (MRE) films using GC-MS and LC-MS/MS. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47114.

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This work was in response to the Defense Logistic Agency’s (DLA) Subsistence Network Broad Agency Announcement, BAA-0003-16 addressing 2019 NDAA Section 329 that states packaging materials used for Meals Ready-to-Eat (MRE) that contact food products must be free of per- and polyfluoroalkyl substances (PFAS). This was addressed by determining the presence or absence of PFAS on MREs by extraction followed by gas chromatography mass spectrometry (GC-MS) and liquid chromatography tandem mass spectrometry (LC-MS/MS). Any samples positive for PFAS were quantitated using LC triple quadrupole (QqQ) MS at the US Army Engineering and Research Development Center (ERDC) and by high resolution quadrupole time-of-flight (qTOF) MS and GC-MS at Oregon State University (OSU).

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Hoeffner, S. L., E. L. Denham, and S. B. Oblath. Analysis of organics in 643-G groundwaters by GC/MS. Office of Scientific and Technical Information (OSTI), 1985. http://dx.doi.org/10.2172/10141469.

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Morgan, Stephen L. Identification of Chemical Markers for Microorganisms by Pyrolysis GC-MS. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada316442.

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Tappen, D. V., E. Hayder, and L. W. Mooney. BESTSRCH: An Automated System for Identification of GC/MS Peaks. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada418603.

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