Results 41 to 50 of about 1,487 (151)

On data analysis in PTR-TOF-MS: From raw spectra to data mining [PDF]

Sensors and Actuators B: Chemical, 2011
Abstract Recently the coupling of proton transfer reaction ionization with a time-of-flight mass analyser (PTR-TOF-MS) has been proposed to realise a volatile organic compound (VOC) detector that overcomes the limitations in terms of time and mass resolution of the previous instrument based on a quadrupole mass analysers (PTR-Quad-MS). This opens new
Cappellin, Luca, Biasioli, Franco, Granitto, P. M., Schuhfried, E., Soukoulis, Christos, Costa, Fabrizio, Märk, T. D., Gasperi, Flavia   +7 more
openaire   +5 more sources

PTR-MS in Italy: A Multipurpose Sensor with Applications in Environmental, Agri-Food and Health Science

Sensors, 2013
Proton Transfer Reaction Mass Spectrometry (PTR-MS) has evolved in the last decade as a fast and high sensitivity sensor for the real-time monitoring of volatile compounds. Its applications range from environmental sciences to medical sciences, from food
Franco Biasioli, Flavia Gasperi, José Sánchez del Pulgar, Andrea Romano, Eugenio Aprea, Francesco Loreto, Luca Cappellin   +6 more
doaj   +1 more source

Investigation of Geraniol Biotransformation by Commercial Saccharomyces Yeast Strains by Two Headspace Techniques: Solid-Phase Microextraction Gas Chromatography/Mass Spectrometry (SPME-GC/MS) and Proton Transfer Reaction-Time of Flight-Mass Spectrometry (PTR-ToF-MS)

Fermentation, 2023
Hop-derived volatile organic compounds (VOCs) and their transformation products significantly impact beer flavour and aroma. Geraniol, a key monoterpene alcohol in hops, has been reported to undergo yeast-modulated biotransformation into various ...
Rebecca Roberts, Iuliia Khomenko, Graham T. Eyres, Phil Bremer, Patrick Silcock, Emanuela Betta, Franco Biasioli   +6 more
doaj   +1 more source

PTR-ToF-MS FINGERPRINTING OF ITALIAN EVOO

, 2021
Extra Virgin Olive Oil (EVOO) is the highest quality olive oil available, extracted from the olive fruit without the use of any heat or chemicals. Among the high quality EVOOs recognized by the European Union (Protected Designation of Origin, PDO, and Protected Geographic Identification, PGI), almost the 40% come from Italy with 42 PDO and 4 PGI EVOOS ...
Aprea, E., Khomenko, I., Gasperi, F., Biasioli, F.   +3 more
openaire   +2 more sources

Identifying volatile in vitro biomarkers for oral bacteria with proton-transfer-reaction mass spectrometry and gas chromatography–mass spectrometry

Scientific Reports, 2021
We have measured the volatile fingerprints of four pathogenic oral bacteria connected to periodontal disease and dental abscess: Porphyromonas gingivalis (three separate strains), Prevotella intermedia, Prevotella nigrescens and Tannerella forsythia ...
Kajsa Roslund, Markku Lehto, Pirkko Pussinen, Kari Hartonen, Per-Henrik Groop, Lauri Halonen, Markus Metsälä   +6 more
doaj   +1 more source

Comparative analysis of Volatile Compounds (potential aromatic ability) in the fruit of 15 olive Italian cultivars

Advances in Horticultural Science, 2018
Virgin olive oils (VOOs) are characterized by peculiar flavors appreciated by the consumers all over the world. Their organoleptic characteristics depend on the aromatic properties of the fruits of the different cultivars, which will originate the final ...
Cosimo Taiti, Mirvat Redwan, Elettra Marone, Giulia Atzori, Elisa Azzarello, Stefano Mancuso   +5 more
doaj   +1 more source

Savannah and Boreal Biomass Burning as a Source for Cloud Condensation Nuclei

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract Aerosol particles emitted in wildfires can contribute to radiative forcing via aerosol‐cloud interactions and by directly interacting with solar radiation. Wildfire emissions increase the concentration of cloud condensation nuclei (CCN) in the atmosphere and thus affect cloud properties (e.g., cloud brightness).
S. Peltokorpi, S. M. Kommula, A. Buchholz, L. Hao, M. Ihalainen, K. Jaars, K. Köster, E. I. Rosewig, S. J. Siebert, M. Somero, L. Vettikkat, P. Yli‐Pirilä, P. G. van Zyl, J. Passig, R. Zimmermann, O. Sippula, V. Vakkari, A. Virtanen   +17 more
wiley   +1 more source

Volatile Organic Compound Release During Litter Decomposition in the Arctic

Global Change Biology Communications, Volume 1, Issue 1, March 2026.
Volatile organic compound (VOC) emissions from Arctic litter decomposition decline over time and differ strongly between Cassiope tetragona and Salix arctica. The inter‐species differences and changes over time are greater than the effects of climate change treatments on litter VOC emissions.
Riikka Rinnan, Mira Skardhamar, Magnus Kramshøj, Tao Li, Sarah H. Svendsen, Toke Bang‐Andreasen, Lars H. Hansen, Thomas Holst   +7 more
wiley   +1 more source

Ion Chemistry in Dielectric Barrier Discharge Ionization: Recent Advances in Direct Gas Phase Analyses

Mass Spectrometry Reviews, Volume 45, Issue 2, Page 193-217, March/April 2026.
ABSTRACT Dielectric barrier discharge ionization (DBDI) sources, employing low‐temperature plasma, have emerged as sensitive and efficient ionization tools with various atmospheric pressure ionization processes. In this review, we summarize a historical overview of the development of DBDI, highlighting key principles of gas‐phase ion chemistry and the ...
Kseniya Dryahina, Miroslav Polášek, Juraj Jašík, Kristýna Sovová, Patrik Španěl   +4 more
wiley   +1 more source

Practical Applications of Secondary/Extractive Electrospray Ionization (SESI): A Versatile Tool for Real‐Time Chemical Analysis

Mass Spectrometry Reviews, Volume 45, Issue 2, Page 392-428, March/April 2026.
ABSTRACT In the 1980s, researchers discovered the remarkable ability of electrospray plumes to effectively ionize gas‐phase molecules via secondary ionization. Around 20 years later—coinciding with the ambient mass spectrometry revolution—secondary electrospray ionization (SESI) and extractive electrospray ionization (EESI) coupled to mass spectrometry
Xin Luo, Huiling Wang, Xiaolan Hu, Sasho Gligorovski, Xue Li, Pablo Sinues   +5 more
wiley   +1 more source