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Littérature scientifique sur le sujet « Mass Spectrometric Study - Atmospheric Compounds »

Auteur : Grafiati

Publié le 7 septembre 2023

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Articles de revues sur le sujet "Mass Spectrometric Study - Atmospheric Compounds"

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Röhler, Laura, Martin Schlabach, Peter Haglund, Knut Breivik, Roland Kallenborn, and Pernilla Bohlin-Nizzetto. "Non-target and suspect characterisation of organic contaminants in Arctic air – Part 2: Application of a new tool for identification and prioritisation of chemicals of emerging Arctic concern in air." Atmospheric Chemistry and Physics 20, no. 14 (2020): 9031–49. http://dx.doi.org/10.5194/acp-20-9031-2020.

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Abstract. The Norwegian Arctic possesses a unique environment for the detection of new potential chemicals of emerging Arctic concern (CEACs) due to remoteness, sparse population and the low number of local contamination sources. Hence, a contaminant present in Arctic air is still considered a priority indication for its environmental stability and environmental mobility. Today, legacy persistent organic pollutants (POPs) and related conventional environmental pollutants are already well-studied because of their identification as Arctic pollutants in the 1980s. Many of them are implemented and

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Brüggemann, Martin, Laurent Poulain, Andreas Held, et al. "Real-time detection of highly oxidized organosulfates and BSOA marker compounds during the F-BEACh 2014 field study." Atmospheric Chemistry and Physics 17, no. 2 (2017): 1453–69. http://dx.doi.org/10.5194/acp-17-1453-2017.

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Abstract. The chemical composition of ambient organic aerosols was analyzed using complementary mass spectrometric techniques during a field study in central Europe in July 2014 (Fichtelgebirge – Biogenic Emission and Aerosol Chemistry, F-BEACh 2014). Among several common biogenic secondary organic aerosol (BSOA) marker compounds, 93 acidic oxygenated hydrocarbons were detected with elevated abundances and were thus attributed to be characteristic for the organic aerosol mass at the site. Monoterpene measurements exhibited median mixing ratios of 1.6 and 0.8 ppbV for in and above canopy levels

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Zogka, Antonia G., Manolis N. Romanias, and Frederic Thevenet. "Formaldehyde and glyoxal measurement deploying a selected ion flow tube mass spectrometer (SIFT-MS)." Atmospheric Measurement Techniques 15, no. 7 (2022): 2001–19. http://dx.doi.org/10.5194/amt-15-2001-2022.

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Abstract. Formaldehyde (FM) and glyoxal (GL) are important atmospheric species of indoor and outdoor environments. They are either directly emitted in the atmosphere, or they are formed through the oxidation of organic compounds by indoor and/or outdoor atmospheric oxidants. Despite their importance, the real-time monitoring of these compounds with soft ionization mass spectrometric techniques, e.g., proton transfer mass spectrometry (PTR-MS), remains problematic and is accompanied by low sensitivity. In this study, we evaluate the performance of a multi-ion selected ion flow tube mass spectro

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Ahn, Yun Gyong, So Hyeon Jeon, Hyung Bae Lim, et al. "Analysis of Polycyclic Aromatic Hydrocarbons in Ambient Aerosols by Using One-Dimensional and Comprehensive Two-Dimensional Gas Chromatography Combined with Mass Spectrometric Method: A Comparative Study." Journal of Analytical Methods in Chemistry 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/8341630.

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Advanced separation technology paired with mass spectrometry is an ideal method for the analysis of atmospheric samples having complex chemical compositions. Due to the huge variety of both natural and anthropogenic sources of organic compounds, simultaneous quantification and identification of organic compounds in aerosol samples represents a demanding analytical challenge. In this regard, comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (GC×GC-TOFMS) has become an effective analytical method. However, verification and validation approaches to quantify th

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Rincón, Angela G., Ana I. Calvo, Mathias Dietzel, and Markus Kalberer. "Seasonal differences of urban organic aerosol composition – an ultra-high resolution mass spectrometry study." Environmental Chemistry 9, no. 3 (2012): 298. http://dx.doi.org/10.1071/en12016.

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Environmental contextUnderstanding the molecular composition and chemical transformations of organic aerosols during atmospheric aging is a major challenge in atmospheric chemistry. Ultra-high resolution mass spectrometry can provide detailed information on the molecular composition of organic aerosols. Aerosol samples collected in summer and winter at an urban site are characterised and compared in detail with respect to the elemental composition of their components, especially nitrogen- and sulfur-containing compounds, and are discussed with respect to atmospheric formation processes. Abstra

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Schneider, J., S. Borrmann, A. G. Wollny, et al. "Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001)." Atmospheric Chemistry and Physics 4, no. 1 (2004): 65–80. http://dx.doi.org/10.5194/acp-4-65-2004.

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Abstract. Mass spectrometric analysis of volatile and semi-volatile (=non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved, quantitative mass spectrometric technique (the Aerodyne Aerosol Mass Spectrometer, AMS) has been used, and the results are compared to filter sampling methods and particle sizing techniques. The different techniques agree with the finding that the fine particle mode (D<1.2 mm) consisted mostly of ammonium sulfate and of organic material. The aerosol sulfate ranged between 2 and 12 mg/m3. On most

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Alsaggaf, Wejdan T. "The Chemistry of Paper in Paper Spray Ionization Mass Spectrometry." International Journal of Chemistry 12, no. 1 (2019): 16. http://dx.doi.org/10.5539/ijc.v12n1p16.

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There are many rapidly evolving technologies that use simple papers as a surface for chemical reactions and detection of molecules. One example of this application is the use of paper as a surface for ionization and introduction of compounds into mass spectrometry. The current work was designed to investigate mechanisms of interaction between the paper and analytes using mass spectrometry as the detection instrument. Standard compounds with different sizes were used in this study. Factors investigated include the effects of the paper geometry (5 mm) and position (tp=90&ordm;) were found to

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Müller, L., M. C. Reinnig, K. H. Naumann, et al. "Formation of 3-methyl-1,2,3-butanetricarboxylic acid via gas phase oxidation of pinonic acid – a mass spectrometric study of SOA aging." Atmospheric Chemistry and Physics 12, no. 3 (2012): 1483–96. http://dx.doi.org/10.5194/acp-12-1483-2012.

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Abstract. This paper presents the results of mass spectrometric investigations of the OH-initiated oxidative aging of α-pinene SOA under simulated tropospheric conditions at the large aerosol chamber facility AIDA, Karlsruhe Institute of Technology. In particular, the OH-initiated oxidation of pure pinic and pinonic acid, two well-known oxidation products of α-pinene, was investigated. Two complementary analytical techniques were used, on-line atmospheric pressure chemical ionization/mass spectrometry (APCI/MS) and filter sampling followed by liquid chromatography/mass spectrometry (LC/ESI-MS)

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Khasanov, U., SS Iskhakova, and DT Usmanov. "Examination of the effect of air atmosphere on heterogeneous reactions under surface ionization of psychotropic drug molecules." European Journal of Mass Spectrometry 26, no. 6 (2020): 409–18. http://dx.doi.org/10.1177/1469066720976016.

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The results of mass spectrometric studies of surface ionization of molecules of psychotropic drugs such as chlorpromazine, amitriptyline and medazepam in an air atmosphere have been presented. The channels of heterogeneous reactions occurring during the molecule adsorption on the hot surface of the thermoemitter from refractory metal oxides have been revealed, as well as the influence of air atmosphere on these reactions. A strong influence of the air atmosphere on the heterogeneous association reactions with the emission of [M + H]+ ions has been found. This ion line is the main in the mass s

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Riva, Matthieu, Pekka Rantala, Jordan E. Krechmer, et al. "Evaluating the performance of five different chemical ionization techniques for detecting gaseous oxygenated organic species." Atmospheric Measurement Techniques 12, no. 4 (2019): 2403–21. http://dx.doi.org/10.5194/amt-12-2403-2019.

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Abstract. The impact of aerosols on climate and air quality remains poorly understood due to multiple factors. One of the current limitations is the incomplete understanding of the contribution of oxygenated products, generated from the gas-phase oxidation of volatile organic compounds (VOCs), to aerosol formation. Indeed, atmospheric gaseous chemical processes yield thousands of (highly) oxygenated species, spanning a wide range of chemical formulas, functional groups and, consequently, volatilities. While recent mass spectrometric developments have allowed extensive on-line detection of a my

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Thèses sur le sujet "Mass Spectrometric Study - Atmospheric Compounds"

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Fischbeck, Garlich [Verfasser], and J. [Akademischer Betreuer] Orphal. "Mass-spectrometric in-situ measurements of atmospheric volatile organic compounds onboard passenger and research aircraft / Garlich Fischbeck ; Betreuer: J. Orphal." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1168325617/34.

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Le, Maître Johann. "Développement de la spectrométrie de masse à ultra- haute résolution associée à la spectrométrie de mobilité ionique pour la caractérisation de coupes pétrolières lourdes. structural analysis of heavy oil fractions afterr hydrodenitrogenation by high-resolution tandem mass spectrometry and ion mobility spectrometry Structural analysis of neutral nitrogen compounds refractory to the hydrodenitrogenation process of heavy oil fractions by high-resolution tandem mass spectrometry and ion mobility-mass spectrometry Chemical characterization of 15 biocrudes obtained from hydrothermal liquefaction of industrially cultivated wild micro algae Chemical characterization with different analytical techniques, a way to understand the process: Case of the paraffinic base oil production line Exploring complex mixtures by cyclic ion mobility high-resolution mass spectrometry – Application towards Petroleum. Simulation and modeling of Collision Cross Section for structural elucidation of heavy oil fraction by ion mobility-mass spectrometry: Using polyaromatic hydrocarbons compounds mixture as calibration standard Characterization of sulfoxides compounds in dimeric distribution of heavy oil fractions by positive-ion electrospray ionization FTICR mass spectrometry Structural analysis of Petroporphyrins from asphaltene by trapped ion mobility coupled with a Fourier transform ion cyclotron resonance mass spectrometer. Cyclic ion mobility spectrometry coupled to high-resolution time-of-flight mass spectrometry equipped with atmospheric solid analysis probe for the molecular characterization of combustion particulate matter. Structural study of analogues of Titan’s haze by trapped ion mobility coupled with a Fourier transform ion cyclotron mass spectrometer." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR051.

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L'évolution des réserves de pétrole implique l'utilisation en raffinerie de pétroles bruts non conventionnels, bien souvent plus lourds et donc difficiles à caractériser. Les produits pétroliers sont en effet des mélanges chimiques extrêmement complexes. La partie légère et volatile peut être analysée par chromatographie en phase gazeuse couplée à la spectrométrie de masse (GC/MS), permettant l'identification des composés par l'utilisation de mesures de masses précises et de modèles de fragmentation. Cependant ces techniques sont inadaptées à l'analyse des fractions lourdes. Dans la pratique,

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Fitzgerald, Mark. "The mass spectrometric and theoretical study of some cumulene oxides of potential interstellar significance : submitted for the degree of Doctor of Philosophy (Ph.D.) /." Title page, table of contents and abstract only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phf5531.pdf.

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Castada, Hardy Zingalaoa. "A FUNDAMENTAL AND APPLIED APPROACH TO SELECTED ION FLOW TUBE-MASS SPECTROMETRIC STUDY OF VOLATILE ORGANIC COMPOUNDS IN SWISS-TYPE CHEESES." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405986395.

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Fitzgerald, Mark. "The mass spectrometric and theoretical study of some cumulene oxides of potential interstellar significance." Thesis, 2004. http://hdl.handle.net/2440/69460.

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Focuses upon a number of oxygen-substituted cumulenes (cumulene oxides), including charged and neutral states of CCCCO, several isomers of C₄HO and C₄H₂O, and HCCCCCO and CCCCCHO.<br>Thesis (Ph.D.) -- University of Adelaide, School of Chemistry and Physics, 2004

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Chapitres de livres sur le sujet "Mass Spectrometric Study - Atmospheric Compounds"

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Lin, M. C. "Multiphoton Ionization/Mass Spectrometric Study of OMCVD Mechanisms Under Single Gas-Surface Collision Conditions." In Mechanisms of Reactions of Organometallic Compounds with Surfaces. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-2522-0_22.

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Rivera, J., F. Ventura, J. Caixach, J. Romero, and D. Fraisse. "FAB Mass Spectrometric Applications to the Study of Non Volatile Organic Compounds in Water." In Organic Micropollutants in the Aquatic Environment. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3356-2_36.

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Rudzinski, Walter E. "Chromatographic Separation and Atmospheric Pressure Ionization/Mass Spectrometric Analysis of Nitrogen, Sulfur and Oxygen Containing Compounds in Crude Oils." In Analytical Advances for Hydrocarbon Research. Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-9212-3_13.

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Fang, Jingjing, Kexian Li, Xinhong Xu, Xiaomeng Ren, and Lu Jiang. "Air Contaminants in an Underwater Vehicle Cabin During Navigation." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210345.

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The purpose of this study is to study the air contaminants in the cabins of underwater vehicle. The basic data help for the better research of the underwater vehicle cabin environment standard and the control strategy. Pretreatment and analysis method of volatile organic compounds was preconcentration combined with gas chromatography under the condition of liquid nitrogen and detected by chromatography-mass spectrometry. The pollution of particles, carbon monoxide and carbon dioxide during the underwater vehicle voyage were monitored by online monitoring instrument. Altogether 34 kinds of pollution components were detected, most of which were low in concentration. Some are low olfactory threshold or high toxic components, such as dimethyldisulfide, benzene, carbon disulfide, trichloromethane, and several reached to ppm level. The contamination of the particles was mainly fine particles and part cabins exceeded the national standard of indoor air quality. The highest concentration of carbon dioxide in accommodation space exceeded the permissible concentration of atmosphere composition aboard diesel underwater vehicle compartments. The increase submerged time made the environment in the cabins deteriorate. The concentration of trace contaminants may close to or beyond the relevant standards with the prolonged time. The volatile organic compounds, particles, carbon monoxide and carbon dioxide aggravated the air circumstance in the cabins. It should be determined the permissible concentration of air contaminants in underwater vehicle as soon as possible.

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Actes de conférences sur le sujet "Mass Spectrometric Study - Atmospheric Compounds"

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Lupaescu, Ancuta-Veronica, Brindusa-Alina Petre, Monica Iavorschi, and Mircea Oroian. "ANALYSIS OF PROTEIN CONTENT AND EVALUATION OF ANTIOXIDANT ACTIVITY OF LINDEN AND HAWTHORN POLLEN." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/6.1/s25.08.

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Harvested bee pollen has been used since ancient times for its healthy properties and nutritional value. In terms of composition, bee pollen contains a large number of different substances such as proteins, carbohydrates and lipids as well as phenolic organic compounds. The protein content is the second most abundant component, its levels (10 to 40%, w/w) depending on the type of plant. Recently, numerous studies have demonstrated the beneficial properties of pollen in promoting health and reducing the risk of developing certain illnesses. In addition, the anti-oxidative and anti-aging effects

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Sperka, Jirí, Lenka Zajícková, Ondrej Jasek, et al. "Growth of Carbon Materials on Gold Substrate by Plasma Enhanced CVD." In 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.395-398.

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Carbon is a versatile building element of many interesting materials that have already find practical applications in the form of thin films (diamond, DLC) or potential applications in the form of nanostructures (fullerenes, carbon nanotubes, graphene). For electronics or sensors, it is important to provide a very good contact to the functional structures. Gold is the best choice taking into account its inertness, i. e. oxidation resistance. From this point of view the investigation of the growth of carbon materials on gold is important. The carbon-gold interaction plays an important role in d

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Moeckli, M., and M. W. Sigrist. "Trace-Gas Monitoring with a Mobile CO2-Laser Photoacoustic System." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cwd3.

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Laser photoacoustic spectroscopy is a powerful tool for the monitoring of a large number of gaseous substances at concentration levels varying from the ppb to the percent level. We have developed a fully computer controlled mobile CO2 laser photoacoustic spectrometer which has been involved in several field studies [1,2]. Our system will be presented including some recent developments. Owing to the strong absorption, CO2 laser spectroscopy is particularly sensitive to ethene and ammonia, two trace gases that are important for the production of photochemical smog and of acid rain, respectively,

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