Results 31 to 40 of about 1,487 (151)

OH chemistry of non-methane organic gases (NMOGs) emitted from laboratory and ambient biomass burning smoke: evaluating the influence of furans and oxygenated aromatics on ozone and secondary NMOG formation [PDF]

Atmospheric Chemistry and Physics, 2019
Chamber oxidation experiments conducted at the Fire Sciences Laboratory in 2016 are evaluated to identify important chemical processes contributing to the hydroxy radical (OH) chemistry of biomass burning non-methane organic gases (NMOGs).
M. M. Coggon, M. M. Coggon, C. Y. Lim, A. R. Koss, A. R. Koss, A. R. Koss, K. Sekimoto, K. Sekimoto, K. Sekimoto, B. Yuan, B. Yuan, B. Yuan, J. B. Gilman, D. H. Hagan, V. Selimovic, K. J. Zarzana, K. J. Zarzana, K. J. Zarzana, S. S. Brown, J. M. Roberts, M. Müller, R. Yokelson, A. Wisthaler, A. Wisthaler, J. E. Krechmer, J. L. Jimenez, J. L. Jimenez, C. Cappa, J. H. Kroll, J. de Gouw, J. de Gouw, C. Warneke, C. Warneke   +32 more
doaj   +1 more source

PTR‐ToF‐MS characterisation of roasted coffees (C. arabica) from different geographic origins [PDF]

Journal of Mass Spectrometry, 2014
Characterisation of coffees according to their origins is of utmost importance for commercial qualification. In this study, the aroma profiles of different batches of three monoorigin roasted Coffea arabica coffees (Brazil, Ethiopia and Guatemala) were analysed by Proton‐Transfer‐Reaction‐Time of Flight‐Mass Spectrometry (PTR‐ToF‐MS).
Yener, Sine, Romano, Andrea, Cappellin, Luca, Märk, T., Sanchez Del Pulgar Rico, José, Gasperi, Flavia, Navarini, L., Biasioli, Franco   +7 more
openaire   +8 more sources

Exploring volatile organic compound emission from thermally modified wood by PTR-ToF-MS

The Analyst, 2022
PTR-ToF-MS allows for the rapid and sensitive characterisation of the VOC release profile, which varies significantly according to both tree species and treatment type.
Andrea Romano, Luca Cappellin, Ignazia Cuccui, Sara Bogialli, Iuliia Khomenko, Matteo Tonezzer, Franco Biasioli, Paolo Pastore, Ottaviano Allegretti   +8 more
openaire   +5 more sources

Field measurements of methylglyoxal using proton transfer reaction time-of-flight mass spectrometry and comparison to the DNPH–HPLC–UV method [PDF]

Atmospheric Measurement Techniques, 2018
Methylglyoxal (MGLY) is an important atmospheric α-dicarbonyl species for which photolysis acts as a significant source of peroxy radicals, contributing to the oxidizing capacity of the atmosphere and, as such, the formation of secondary pollutants ...
V. Michoud, V. Michoud, S. Sauvage, T. Léonardis, I. Fronval, A. Kukui, N. Locoge, S. Dusanter   +7 more
doaj   +1 more source

Detailed Speciation of Non-Methane Volatile Organic Compounds in Exhaust Emissions from Diesel and Gasoline Euro 5 Vehicles Using Online and Offline Measurements

Toxics, 2022
The characterization of vehicle exhaust emissions of volatile organic compounds (VOCs) is essential to estimate their impact on the formation of secondary organic aerosol (SOA) and, more generally, air quality.
Baptiste Marques, Evangelia Kostenidou, Alvaro Martinez Valiente, Boris Vansevenant, Thibaud Sarica, Ludovic Fine, Brice Temime-Roussel, Patrick Tassel, Pascal Perret, Yao Liu, Karine Sartelet, Corinne Ferronato, Barbara D’Anna   +12 more
doaj   +1 more source

EVOO or not EVOO? A new precise and simple analytical tool to discriminate extra virgin olive oils

Advances in Horticultural Science, 2017
International Olive Oil Council (IOOC) states chemical and organolep- tic parameters to classify the commercial grade of olive oil. Finding tools or analytical procedures able to support the organoleptic evaluation would be helpful to streamline and ...
C. Taiti, E. Marone
doaj   +1 more source

Linking GC-MS and PTR-TOF-MS fingerprints of food samples

Chemometrics and Intelligent Laboratory Systems, 2012
Abstract Recently the first applications in food science and technology of the newly available volatile organic compound (VOC) detection technique proton transfer reaction‐mass spectrometry, coupled with a time of flight mass analyzer (PTR-TOF-MS), have been published.
Cappellin, Luca, Aprea, Eugenio, Granitto, Pablo Miguel, Wehrens, Ron, Soukoulis, Christos, Viola, Roberto, Mark, Tilmann D., Gasperi, Flavia, Biasioli, Franco   +8 more
openaire   +4 more sources

Fast Direct Injection Mass-Spectrometric Characterization of Stimuli for Insect Electrophysiology by Proton Transfer Reaction-Time of Flight Mass-Spectrometry (PTR-ToF-MS)

Sensors, 2012
Electrophysiological techniques are used in insect neuroscience to measure the response of olfactory neurons to volatile odour stimuli. Widely used systems to deliver an olfactory stimulus to a test insect include airstream guided flow through glass ...
Franco Biasioli, Marco Tasin, Luca Cappellin   +2 more
doaj   +1 more source

Measurements of hydrogen sulfide (H₂S) using PTR-MS: calibration, humidity dependence, inter-comparison and results from field studies in an oil and gas production region [PDF]

Atmospheric Measurement Techniques, 2014
Natural gas production is associated with emissions of several trace gases, some of them classified as air toxics. While volatile organic compounds (VOCs) have received much attention, hydrogen sulfide (H2S) can also be of concern due to the known health
R. Li, C. Warneke, M. Graus, R. Field, F. Geiger, P. R. Veres, J. Soltis, S.-M. Li, S. M. Murphy, C. Sweeney, G. Pétron, J. M. Roberts, J. de Gouw   +12 more
doaj   +1 more source

Characterization of volatile compounds in Mentha spicata L. dried leaves

Advances in Horticultural Science, 2017
Gas chromatography-mass spectrometry (GC-MS) is one of the most common techniques used to measure and to characterize volatile organic compounds (VOCs).
E. Masi, S. Caparrotta, C. Taiti, F. Ieri, P. Fiume, N. Moselhy, S. Mancuso, A. Romani   +7 more
doaj   +1 more source