Results 11 to 20 of about 27,664 (259)

Online measurements of cycloalkanes based on NO⁺ chemical ionization in proton transfer reaction time-of-flight mass spectrometry (PTR-ToF-MS) [PDF]

Atmospheric Measurement Techniques, 2022
Cycloalkanes are important trace hydrocarbons existing in the atmosphere, and they are considered a major class of intermediate volatile organic compounds (IVOCs).
Y. Chen, Y. Chen, B. Yuan, B. Yuan, C. Wang, S. Wang, S. Wang, X. He, X. He, C. Wu, C. Wu, X. Song, X. Song, Y. Huangfu, Y. Huangfu, X.-B. Li, X.-B. Li, Y. Liao, Y. Liao, M. Shao, M. Shao   +20 more
doaj   +1 more source

Thermal-Desorption Proton-Transfer-Reaction Quadruple-Interface Time-of-Flight Mass Spectrometry: Online Analysis of Organic Aerosol Using Single-Component Particles

Aerosol and Air Quality Research, 2022
A proton transfer reaction-quadrupole interface time-of-flight mass spectrometer was combined with a hand-made thermal desorption (TD) instrument for real-time analysis of organic aerosol particles.
Kei Sato, Sathiyamurthi Ramasamy, Satoshi Inomata, Yu Morino, Toshihide Hikida, Akio Shimono   +5 more
doaj   +1 more source

Real-time measurement of volatile chemicals released by bed bugs during mating activities.

PLoS ONE, 2012
In recent years, bed bug (Hemiptera: Cimicidae) problems have increased dramatically in many parts of the world, leading to a renewed interest in their chemical ecology.
Ole Kilpinen, Dezhao Liu, Anders Peter S Adamsen   +2 more
doaj   +1 more source

Calibration and intercomparison of acetic acid measurements using proton-transfer-reaction mass spectrometry (PTR-MS) [PDF]

Atmospheric Measurement Techniques, 2012
Acetic acid is one of the most abundant organic acids in the ambient atmosphere, with maximum mixing ratios reaching into the tens of parts per billion by volume (ppbv) range.
K. B. Haase, W. C. Keene, A. A. P. Pszenny, H. R. Mayne, R. W. Talbot, B. C. Sive   +5 more
doaj   +1 more source

Development and validation of a portable gas phase standard generation and calibration system for volatile organic compounds [PDF]

Atmospheric Measurement Techniques, 2010
We report on the development of an accurate, portable, dynamic calibration system for volatile organic compounds (VOCs). The Mobile Organic Carbon Calibration System (MOCCS) combines the production of gas-phase VOC standards using permeation or ...
P. Veres, J. B. Gilman, J. M. Roberts, W. C. Kuster, C. Warneke, I. R. Burling, J. de Gouw   +6 more
doaj   +1 more source

Gas Chromatography—High-Temperature Proton-Transfer Reaction Mass Spectrometry as a Novel Tool for Forensic Drug Testing

Separations, 2022
Proton-transfer reaction mass spectrometry (PTR-MS) is a versatile tool for the mass spectrometric analysis of organic molecules in gaseous samples. Due to its operation principle, PTR-MS is a soft ionization technique generating spectral data typically ...
Vera Reinstadler, Rene Gutmann, Florian Pitterl, Klaus Winkler, Herbert Oberacher   +4 more
doaj   +1 more source

Emission Profiles of Volatiles during 3D Printing with ABS, ASA, Nylon, and PETG Polymer Filaments

Molecules, 2022
In this short communication we characterize the emission of volatile organic compounds (VOCs) from fused filament fabrication (FFF) 3D printing using four polymer materials, namely polyethylene terephthalate glycol-modified (PETG), acrylonitrile styrene ...
Wojciech Wojnowski, Mariusz Marć, Kaja Kalinowska, Paulina Kosmela, Bożena Zabiegała   +4 more
doaj   +1 more source

Contribution of livestock H2S to total sulfur emissions in a region with intensive animal production

Nature Communications, 2017
Hydrogen sulfide (H2S) from agricultural sources is generally omitted from sulfur emission estimates despite its abundance in livestock emissions. Here, the authors show that agriculture is the most important source of sulfur in Denmark using proton ...
Anders Feilberg, Michael Jørgen Hansen, Dezhao Liu, Tavs Nyord   +3 more
doaj   +1 more source

Measuring acetic and formic acid by proton-transfer-reaction mass spectrometry: sensitivity, humidity dependence, and quantifying interferences [PDF]

Atmospheric Measurement Techniques, 2015
We present a detailed investigation of the factors governing the quantification of formic acid (FA), acetic acid (AA), and their relevant mass analogues by proton-transfer-reaction mass spectrometry (PTR-MS), assess the underlying fragmentation pathways ...
M. Baasandorj, D. B. Millet, L. Hu, D. Mitroo, B. J. Williams   +4 more
doaj   +1 more source

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