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

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

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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2

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. S

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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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4

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).

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5

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 1

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6

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 sät

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7

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.

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8

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 p

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9

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

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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 Chlor

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El, Fels Loubna. "Suivi physico-chimique, microbiologique et écotoxicologique du compostage de boues de STEP mélangées à des déchets de palmier : validation de nouveaux indices de maturité." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0138/document.

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Le traitement de boues de station d'épuration (Boues activées de Marrakech) en mélange avec déchets verts (Palmier dattier) selon deux mélanges dont les proportions : A (1/3 Boues + 2/3 Déchets de palmier) et B (1/2 Boues + 1/2 Déchets de palmier), a été effectué par la filière du compostage, pendant six mois. Au cours du co-compostage, l’intense activité microbienne s’est traduite par une augmentation de température (autour 65 C°) au cours des premières semaines (phase thermophile) et un taux de décomposition final de l’ordre de 40%. Après six mois de co-compostage, le compost final est carac

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Mouzay, Julie. "Etude de l'évolution photochimique des aérosols de Titan." Electronic Thesis or Diss., Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0473.

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Cette thèse porte sur l’étude de l’évolution photochimique des aérosols présents dans la stratosphère de Titan. Au début de la saison automnale au pôle sud, la stratosphère, atteinte par des rayonnements FUV solaires, s’est refroidie et particulièrement enrichie en matériaux organiques : en aérosols, ainsi qu’en benzène (C6H6) et cyanure hydrogène (HCN), formés à haute altitude, qui ont été à l’origine de la formation de nuages de glace saisonniers. Expérimentalement, la photochimie de ces glaces, induite par des rayonnements UV similaires à ceux parvenant dans la basse stratosphère (l > 23

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Nohra, Youssef A. "Résines végétales actuelles et fossiles : origine, caractérisation chimique et évolution." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S165.

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Les travaux de cette thèse portent sur la caractérisation chimique des ambres provenant de plusieurs gisements d’âges et d’origines géographiques variés, dont certains sont inédits. Des protocoles identiques à tous les échantillons et combinant les analyses spectroscopiques (IR et RMN 13C) et chromatographiques (THM-CPG-SM) ont été appliqués, permettant d’identifier l’origine botanique des ambres et fournissant des indices pour la reconstitution des paléoenvironnements terrestres. La caractérisation chimique des gisements d’ambre du Jurassique supérieur (Kimméridgien) jusqu’au Crétacé supérieu

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14

Aarseth, Larsson Kim. "Chemical Characterisation of Nitrocellulose." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-41416.

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Nitrocellulose is the main component in many types of ammunition, propellants and explosives. The principles of production for nitrocellulose have not changed much since the 19th century when it started being industrially produced for this purpose. The character of the nitrocellulose has a large effect on the end products abilities. The aim of this study was to develop a method that would be able to characterise and distinguish between nitrocellulose from different manufacturers to be able to relate the character of the nitrocellulose to the properties of ammunition, propellants and explosives

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15

Lee, Yu. "La técnica de la policromía en los artesonados de templos budistas en Taiwán: caracterización científica y estudio de la aplicabilidad de consolidantes biocompatibles para su conservación." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/59465.

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[EN] ABSTRACT The traditional Taiwan polychrome include a wide range of materials, with very different behaviors showing problems of different nature that sometimes requires the application of appropriate adherence and/or consolidation treatment. From this, a study has been conducted aimed to identify these materials and their behaviors as well as, the proposal of a proper adhesive/consolidant with physico-chemical stability and low toxicity. The identification of the materials confirms the use of porcine blood as binder in the preparation layer and tung oil as the binder in the paint layer

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16

Breyer, Sacha. "Etude du procédé de co-pyrolyse de déchets plastiques et d’huiles de lubrification usagées dans le but de produire un combustible liquide alternatif." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/238688.

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Cette étude s’inscrit dans le cadre du projet MINERVE de la région wallonne quivise notamment à valoriser les anciens centres d’enfouissement technique et leur contenuau travers de la production de matières premières et de sources d’énergie. Plus particulièrement,l’objectif de ce travail est d’étudier un procédé de co-pyrolyse de déchetsplastiques et d’huiles de lubrification usagées, ayant pour finalité la production d’uncombustible alternatif liquide pour l’industrie, en vue d’une future montée en échelledu procédé.Pour ce faire, différentes approches ont été poursuivies. Premièrement, nous

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17

Kristina, Tešanović. "Биолошка активност и хемијски састав аутохтоних врста гљива Coprinus comatus (O.F. Müll.) Pers. Gray, 1797 и Coprinellus truncorum (Scop.) Redhead, Vilgalys & Monclavo, 2001". Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104928&source=NDLTD&language=en.

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У оквиру ове докторске дисертације испитана је биолошка активност екстраката плодних тела и потопљених култура (мицелије и филтрата) аутохтоних врста гљива <em>Coprinus comatus</em> и<em> Coprinellus truncorum</em>. Такође, испитан је  метаболизам фосфата мицелија обе врсте употребом нуклеарно магнетне резонантне спректроскопије (<sup>31</sup>Р NMR), утицај ванадијума на метаболизам фосфата као и идентификација облика ванадата присутних у ћелији мицелије (<sup>51</sup>V NMR). Утврђена је антирадикалска и антиоксидативна активност  етанолних,метанолних и водених екстраката гљива при ч

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18

Bell, Benjamin. "Advancing the application of analytical techniques in the biological chemistry of sporopollenin : towards novel plant physiological tracers in Quaternary palynology." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/advancing-the-application-of-analytical-techniques-in-the-biological-chemistry-of-sporopollenin-towards-novel-plant-physiological-tracers-in-quaternary-palynology(59605f2b-642a-4ea9-8921-4c926217e6f2).html.

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Palynology, the study of organic microfossils, is an important tool for improving our understanding of past environments and landscapes. Palynology provides a wealth of information from which climatic and environmental conditions can be inferred. However, inferred climatic and environmental conditions are often open to interpretation. Assumptions made about past climate conditions from pollen assemblages often rely on qualitative understanding of modern-day vegetation distributions, rather than empirical relationships. Historic anthropogenic impact on the environment must also be inferred, and

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De, Vos Betty-Jayne. "Gas chromatography coupled with ion trap mass spectrometry (GC-MS and GC-MS-MS) - for arson debris analysis." Diss., Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02082006-160506.

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Nakovich, Laura. "Analysis of Biogenic Amines by GC/FID and GC/MS." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35027.

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Low levels of biogenic amines occur naturally, but high levels (FDA sets 50 ppm of histamine in fish as the maximum allowable level) can lead to scombroid poisoning. Amines in general are difficult to analyze by Gas Chromatography (GC) due to their lack of volatility and their interaction with the GC column, often leading to significant tailing and poor reproducibility. Biogenic amines need to be derivatized before both GC and HPLC analyses. The objective of this research was to develop a relatively fast, reproducible method to derivatize and quantitate biogenic amines in fish at trace

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Sýkora, Richard. "Využití GC/MS při analýze léčiv." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216709.

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This diploma thesis is based on the current issue of the presence of pharmaceuticals in various components of the environment. Concerning the contamination by residues of pharmaceuticals the most affected environment is the aquatic environment where these substances leaks especially from wastewater treatment plants, which eliminate them during the cleaning process only partially. This work is focused on the selected group of pharmaceuticals, non-steroidal anti-inflammatory drugs (salicylic acid, ibuprofen, caffeine, naproxen, ketoprofen, diclofenac) in waste water. For analysis purposes two ty

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ZHANG, PENGHAN. "Application of GC×GC-MS in VOC analysis of fermented beverages." Doctoral thesis, country:IT, 2021. http://hdl.handle.net/10449/72495.

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GC×GC is an efficient tool for the analysis of volatile compound. However, improvements are still required on VOC extraction, GC×GC setup and data processing. Different sample preparation techniques and GC×GC setup were compared based on the literature study and experimental results. Each VOC extraction technology has its own drawbacks and needs new developments. There wasn’t an ideal sample preparation technique to recover all the VOCs from the beverage sample. Furthermore, the VOCs recovered by different techniques were very different. The discussion of the pros and cons of the diffe

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Zhang, Penghan. "Application of GC×GC-MS in VOC analysis of fermented beverages." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/323992.

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GC×GC is an efficient tool for the analysis of volatile compound. However, improvements are still required on VOC extraction, GC×GC setup and data processing. Different sample preparation techniques and GC×GC setup were compared based on the literature study and experimental results. Each VOC extraction technology has its own drawbacks and needs new developments. There wasn’t an ideal sample preparation technique to recover all the VOCs from the beverage sample. Furthermore, the VOCs recovered by different techniques were very different. The discussion of the pros and cons of the different tec

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Lucero, Paola. "Analyse chimique des matières résineuses employées dans le domaine artistique pré-hispanique au Mexique : application aux échantillons archéologiques aztèque et maya." Phd thesis, Université d'Avignon, 2012. http://tel.archives-ouvertes.fr/tel-00959989.

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Dans le present travail de recherche notre équipe s'est interessé à l'étude de la composition chimique -au niveau moléculaire- d'un groupe d'échantillons résineuses provenant d'objects Aztecs et Mayas. Le but ultime de cette étude a été d'établir l'origin botanique de ces résines et d'avoir une vue d'ensemble des formulations utilisées dans les adhésifs ou les figurines, afin de mieux comprendre leurs propriétes physiques.Pour aboutir à cet objectif une stratégie analytique très spécifique a été créeé et mise en oeuvre. Cette stratégie a inclus l'analyse d'échantillons des résines archéologiqu

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Silva, Rosselei Caiél da. "Métodos individual e multirresidual para determinação de pesticidas em grãos e derivados por GC-PFPD, GC-ITD-MS e LC-MS/MS." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/4212.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Due to the complexity of grains like soybean, corn and rice, and the very low pesticide concentration expected for these samples, it is really necessary to develop efficient and reliable analytical methods to identify and quantify their residues. The possibility to perform the determination of a large number of pesticides in just a single chromatographic analysis is the major advantage of the multi-residue methods. However, there are important compounds that are not possible to be analyzed together, like the dithiocarbamates (DTC

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Lineberry, Quentin. "Determination of Carbon Nanotube Modification by TG-MS and Pyrolysis-GC/MS." TopSCHOLAR®, 2004. http://digitalcommons.wku.edu/theses/534.

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Uniform dispersion of carbon nanotubes (CNTs) has been one of the major impediments to the full development of the incredible suite of properties offered by CNTs, specifically single-walled carbon nanotubes (SWNTs). However, investigators at NASA Langley and the National Institute of Aerospace Research have recently obtained (SWNTs) that are soluble in select solvents, including THF, DM Ac, and ODCB. The SWNTs were exposed to reagents used in cited fullerene modification chemistry in an attempt to produce soluble SWNTs. Upon further examination, it was determined that the intended functionaliz

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Miranda, e. Silva Lígia Maria 1982. "Validação de método de análise de multiresíduos de defensivos agrícolas por GC-MS/MS e LC-MS/MS." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254815.

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Orientador: Marcelo Alexandre Prado<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-21T09:52:53Z (GMT). No. of bitstreams: 1 MirandaeSilva_LigiaMaria_M.pdf: 148256 bytes, checksum: 789cac2002bb2e8dcb1bf70832d395b6 (MD5) Previous issue date: 2012<br>Resumo: O crescente aumento populacional em escala mundial, tornou necessário um grande esforço por parte da agricultura para aumentar, a cada ano, a produção de alimentos para atender as necessidades do mercado externo e interno do Brasil. Recursos técnicos

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Donato, Filipe Fagan. "Resíduos de agrotóxicos em água potável usando SPE e determinação rápida por LC-MS/MS e GC-MS/MS." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/10528.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The use of pesticides always has been associated with the effective control of pests or invasive weeds to ensure an increase in the food production. However, the indiscriminate use of these substances has caused the degradation of water resources. In Brazil, the Ministry of Health through Ordinance 2914 defines several parameters of potability, among them, the maximum limits allowed for same pesticides. In this work it was developed and validated a method for the determination of residues of 70 pesticides in drinking water using

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Souza, Patricia Regina de. "Avaliação de técnicas cromatográficas acopladas a espectrometria de massas para análise de morfolina em manga." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-18052016-143752/.

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A constante preocupação com o aumento do uso de agrotóxicos nas lavouras e os riscos gerados pelos resíduos destes compostos fazem com que os órgãos responsáveis pela fiscalização de alimentos no Brasil controlem a presença dessas substâncias nos produtos que chegam à mesa do consumidor. Atualmente, um dos grandes problemas na produção de alimentos é a utilização de substâncias proibidas em lavouras, muitas das quais não possuem estudos nem limites máximos de resíduos (LMR) estabelecidos, assim como a utilização de substâncias já registradas, mas em quantidades ou métodos de manejo incorretos.

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Facco, Janice de Fátima. "Agrotóxicos em milho: otimização e validação de método Multirresíduo empregando GC-MS/MS." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/10530.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Due to the complexity of its matrix, more efficient methods have been studied for the determination of pesticide residues in maize. The use of QuEChERS method coupled to low temperature clean up technique has showed advantages to reduce lipids during sample preparation in matrix with high fat content. It was optimized and validated in this study a multiresidue method for the determination of pesticides in maize employing QuEChERS and GC-MS/MS. The extraction procedure was optimized though the factorial design, and consisted in weig

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MacGillivray, Tanya Frances. "Analysis of lichens under environmental stress using pyrolysis-GC-MS and pyrolysis-GC-FID." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0018/MQ54933.pdf.

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Olivares, Igor Renato Bertoni. "\"Desenvolvimento, otimização e validação da técnica HS-SPME-GC/MS para análise de amostras obtidas do Rio Atibaia através da aplicação de uma sistemática \"ISO\" para diagnóstico ambiental de áreas contaminadas\"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-16042007-171617/.

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Neste trabalho foi desenvolvida, otimizada, e validada, uma metodologia para análise de 15 pesticidas organoclorados em sedimento através de HS/SPME-GC/MS. Esta metodologia foi aplicada para análise de amostras reais visando à realização de um diagnóstico da contaminação por pesticidas organoclorados do Rio Atibaia, principalmente em sua região próxima a contaminação oriunda da empresa Shell Brasil S.A. unidade de Paulínia. Para realização deste diagnóstico, também foi desenvolvida uma metodologia padronizada para diagnóstico ambiental de áreas contaminadas, embasada principalmente em conceito

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Rocchi, Matteo. "Analisi e validazione di residui di antiparassitari su matrice acqua in GC/MS/MS." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16979/.

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Il presente lavoro è stato eseguito presso il laboratorio di analisi chimiche Tentamus Agriparadigma (Ravenna) che svolge analisi su diverse matrici (alimenti, acqua, cosmetici, terreni) ricercando in modo sicuro ed affidabile sostanze indesiderate quali pesticidi, residui di farmaci, metalli, etc. Sono stati presi in considerazione pesticidi clorurati e fosforati, oltre ai generici prodotti fitosanitari. I loro principi attivi sono sospette cause di patologie croniche; in particolare, esistono correlazioni tra l’esposizione a pesticidi e patologie come diabete, morbo di Parkinson, morbo di A

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Lerch, Oliver. "Automatisierte Spurenanalyse endokrin disruptiver Substanzen mittels GC/MS-Methoden Festphasenextraktion, Derivatisierung, Tandem-MS-Detektion /." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968338291.

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Kaspar, Hannelore. "Amino acid analysis in biological fluids by GC-MS." kostenfrei, 2009. http://www.opus-bayern.de/uni-regensburg/volltexte/2009/1316/.

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Hamblin, D'Nisha D. "Exhaled Breath Analysis of Smokers Using CMV-GC/MS." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2605.

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The aim of this research was to demonstrate the potential of the novel pre-concentration device, capillary microextraction of volatiles (CMV), for breath analysis. The CMV offers dynamic sampling of volatile organic compounds with its simple coupling to a GC inlet for GC/MS analysis, avoiding expensive thermal desorption instrumentation needed for sorbent tubes, as well as an increased surface area over a single SPME fiber. CMV collectively identified 119 compounds in the breath of 13 self-reported smokers and 7 nonsmokers. The presence and intensity of twelve compounds were used to classify a

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Silva, Rosselei Caiél da. "Comparação entre métodos cromatográficos, empregando GC-ECD, GC-FPD E GC-MS, e espectrofotométrico para determinação de ditiocarbamatos em alface." Universidade Federal de Santa Maria, 2005. http://repositorio.ufsm.br/handle/1/10469.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Brazil is the third largest market for pesticide sales in the world, with almost 400 active ingredients registered in the country, including five dithiocarbamates. This pesticide class consists of very important protective nonsystemic fungicides with broad-spectrum activity registered for the control of fungal deseases on a large variety of crops. Due to its low acute toxicity, combined with strong action, low-cost production and low environmental persistence, the total amount used of these compounds used is still increasing worl

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Beraldo, Daniele Alves de Souza. "Desenvolvimento e validação de método analítico para análise de bisfenol A e nonilfenol em águas superficiais da cidade de Americana, SP." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-24072012-142457/.

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Neste estudo determinou-se o nonilfenol - um composto xenobiótico utilizados na fabricação de antioxidantes, aditivos para óleos lubrificantes e produção de surfactantes etoxilados - e o bisfenol A - um composto químico utilizado na produção de diversos produtos, como, plásticos policarbonatos, resinas epóxi e retardantes de chama. Ambos exibem atividade estrogênica em concentrações abaixo de 1ng L-1 - em cinco pontos de coleta na cidade de Americana, SP. Devido à ampla utilização, esses compostos estão presentes em esgoto industrial em quantidades substanciais. A primeira etapa deste estudo f

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Oliveira, Renata Cabrera de 1984. "Avaliação do potencial do pólen apícola como bioindicador de contaminação ambiental por agrotóxicos." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249441.

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Orientadores: Susanne Rath, Sonia Claudia do Nascimento de Queiroz<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química<br>Made available in DSpace on 2018-08-26T03:44:24Z (GMT). No. of bitstreams: 1 Oliveira_RenataCabrerade_D.pdf: 3973991 bytes, checksum: 53109a8e29cba1ca926627e521d33fd2 (MD5) Previous issue date: 2014<br>Resumo: O uso frequente e indiscriminado de agrotóxicos na agricultura tem acarretado a presença de resíduos nos alimentos e contaminação ambiental, principalmente em países com grande potencial agrícola, como o Brasil. Para avaliar a presença de r

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Bichon, Emmanuelle. "Challenge de l’analyse de dangers chimiques à l’état d’ultra-traces en matrices biologiques complexes." Thesis, Nantes, Ecole nationale vétérinaire, 2016. http://www.theses.fr/2016ONIR089F/document.

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L’étude du lien entre l’exposition de l’Homme aux substances chimiques, notamment via son alimentation,et sa santé est un sujet de préoccupation majeure dans notre société qui présente des challenges multiples.Nous nous sommes attelés à l’un d’entre eux par la production de données analytiques fiables relatives à la contamination des denrées alimentaires et des fluides biologiques humains. Le développement de méthodes analytiques reposant sur des technologies en rupture, à même de s’adresser aux paris de la mesure de composés chimiques émergents (e.g. les retardateurs de flamme bromés) ou hist

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Levaggi, Valeria <1991&gt. "Caratterizzazione chimica del tabacco lavorato (Nicotiana Tabacum, tipo Kentucky) attraverso un approccio analitico multi-metodologico (ICP-MS, GC-MS, HPLC-MS-MS)." Master's Degree Thesis, Università Ca' Foscari Venezia, 2019. http://hdl.handle.net/10579/15053.

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Il presente lavoro di tesi ha l’obiettivo di studiare dal punto di vista chimico, il tabacco “kentucky” coltivato e lavorato in alcune zone della Regione Veneto. Questo tipo di produzione agricola è considerata di nicchia e la caratterizzazione e quantificazione dei suoi principali costituenti chimici non è mai stata approfondita. Nel presente lavoro di tesi si sono individuati alcuni componenti chimici sviluppando e/o perfezionando metodi analitici utili all’individuazione di una "impronta digitale" chimica del tabacco Kentucky veneto. Il Kentucky è un tabacco scuro appartenente alla classe d

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Shah, Iltaf. "Determination of steroidal and nonsteroidal drugs in human body matrices by LC-MS/MS, GC-MS, HPLC and ELISA." Thesis, Kingston University, 2010. http://eprints.kingston.ac.uk/27839/.

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There is an ever-increasing need to develop analytical methods for the detection of steroids, NSAIDs, fibrates, iothalamates and fatty acids for therapeutic, forensic, medical and pharmaceutical applications. Hence, the primary aim of the project was to develop new methods for detection of these classes of drugs in different human. body matrices using chromatographic techniques like enzyme-linked immunosorbent assay [ELISA], HPLC-UVIDADÆLSD, LC-MS/MS and GC-MS/MS. The new methods developed were capable of detecting the drugs: prednisolone, cortisol, prednisone, nandrolone, stanozolol, testoste

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Beh, Daniel. "Application des couplages GC-MS et LC-MS-MS à l'analyse des pesticides dans les eaux : apport de l'électroanalyse." Lyon 1, 2008. http://www.theses.fr/2008LYO10009.

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L’analyse des traces des pesticides dans les eaux et surtout dans l’eau potable peut donner des informations de pollution de l’eau et pour de santé humaine. La présence d’un grand nombre de pesticides de différentes propriétés dans l’eau rend difficile de choisir une méthode d’analyse multirésiduelle. Cependant les résultats publiés étant souvent contradictoires, nous avons réalisé des études des paramètres d’extraction (choix de cartouches d’extraction, nature de solvant, pH, …), et des méthodes d’analyses. Nous nous sommes intéressés à l’extraction sur phase solide (SPE) et à différentes mét

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Deuscher, Zoé. "Identifier les marqueurs clés de la qualité organoleptique des chocolats pour prédire leurs caractéristiques sensorielles." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK012.

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L’appréciation par le consommateur d’un produit alimentaire comme le chocolat est en grande partie due à sa composante aromatique. La perception de cette composante est étroitement liée à la libération des composés d’arômes lors de la consommation du produit. Une étude sensorielle systématiquement menée par la société Valrhona dans une démarche de qualification de ses chocolats noirs de pures origines, fabriqués selon un procédé standard à partir de lots de cacao différents, permet de classer ces chocolats, selon leur profil, en quatre grands pôles sensoriels. Le travail entrepris avait pour b

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

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Asres, Daniel Derbie. "Characterization of carbohydrates using gas chromatography/mass spectrometry (GC/MS)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0001/MQ41677.pdf.

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RIZEL, PATRICIA. "QUALITATIVE STUDIES FOR DETERMINATION OF PYRENE METABOLITES USING GC/MS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4329@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Os Hidrocarbonetos Policíclicos Aromáticos (HPAs) são contaminantes carcinogênicos e mutagênicos, freqüentemente encontrados no ambiente. Muitos organismos são capazes de metabolizá-los rapidamente, tornando de fundamental importância o desenvolvimento de técnicas analíticas para a determinação de seus metabólitos. A determinação do 1- hidroxipireno é considerada com uma das primeiras etapas para a avaliação do risco ambiental por exposição dos HPAs. O pireno é um dos compostos predominantes desta classe de xenobióticos e

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Song, Xiling. "Analysis of Aroma Constituents in Cultivated Strawberries by GC/MS." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/42874.

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In aroma analysis, strawberries have always been the favored fruit because of their relatively high content of typical and pleasant aroma constituents. Esters, aldehydes, alcohols and sulfur compounds have been found to be the main aroma components in strawberry. In recent years, two volatile compounds, 2,5-dimethyl-4-methoxy-3(2H)-furanone (DMF) and 2,5-dimethyl-4-hydroxy-3(2H)-furanone (DHF) were reported to contribute heavily to strawberry aroma. These two compounds have been found in all wild strawberries studied, but found only in few cultivated varieties. In this work, three kinds of

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Milo, John A. "Quantitation of Halogenated Anisoles in Wine via SPME – GC/MS." Connect to resource online, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1230924488.

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Persson, Josefin. "Development and evaluation of methods for analysis of TBECH and HBCD using HRGC/HRMS and HPLC/MS/MS." Thesis, Örebro University, School of Science and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-7695.

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<p>The two additive brominated flame retardants, tetrabromoethylcyclohexane (TBECH) and hexabromocyclododecane (HBCD) are used to prevent fire to start and spread. They are simply mixed with material and are most likely to leach out in the environment, because of non-covalently binding to the material. TBECH can exist as four pairs of enantiomers, α-, β-, γ- and δ-TBECH. The technical HBCD can exist as three pairs of enantiomers, α-, β- and γ-HBCD and two meso forms δ- and ε-HBCD. None of these compounds are produced in Sweden, but they are imported to industries. TBECH has been found in Belug

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