Results 151 to 160 of about 1,345,257 (199)

PTR-MS and GC-MS as complementary techniques for analysis of volatiles: A tutorial review.

Analytica Chimica Acta, 2018
This tutorial review is a critical commentary on the combined use of two instrumental analytical techniques, namely GC-MS and PTR-MS. The first mention of such an analytical approach likely appeared after the year 2000 and despite many advantages, it has
T. Majchrzak, Wojciech Wojnowski, M. Lubinska-Szczygeł, A. Różańska, J. Namieśnik, Tomasz Dymerski   +5 more
semanticscholar   +1 more source

Volatile organic compounds in a typical petrochemical industrialized valley city of northwest China based on high-resolution PTR-MS measurements: Characterization, sources and chemical effects.

Science of the Total Environment, 2019
To scientifically understand the emissions and chemistry of volatile organic compounds (VOCs) in a typical petrochemical industrialized and dust-rich region of Northwest China, VOCs were measured at a receptor site in the Lanzhou Valley using a high ...
Xi Zhou, Zhong-qin Li, Tinjun Zhang, Fanglin Wang, Feiteng Wang, Y. Tao, Xin Zhang, Fanglong Wang, Ju Huang   +8 more
semanticscholar   +1 more source

Sprengstoffe und Drogen — PTR‐MS in der Spurenanalytik

Nachrichten aus der Chemie, 2011
AbstractDie Protonen‐Tauschreaktions‐Massenspektrometrie ist in Lebensmittel‐ und Umweltanalytik eine etablierte Spurengasanalysetechnik. Sie weist auch Drogen und Sprengstoffe im ppt‐Bereich nach.
Simone Jürschik, Philipp Sulzer, Alfons Jordan, Lukas Märk, Tilmann D. Märk   +4 more
openaire   +1 more source

Modifying PTR-MS operating conditions for quantitative headspace analysis of hydro-alcoholic beverages. 2. Brandy characterization and discrimination by PTR-MS

International Journal of Mass Spectrometry, 2014
The characterization of the release of aroma compounds from beverages can bring pertinent information that can help in better understanding aroma perception. However, this kind of measurement is complex for high ethanol-containing beverages and needs to be adapted or optimized.
Fiches, Guillaume, Deleris, Isabelle, Saint-Eve Delbos, Anne, Brunerie, Pascal, Souchon, Isabelle   +4 more
openaire   +2 more sources

Mass spectrometric profile of exhaled breath—field study by PTR-MS

Respiratory Physiology & Neurobiology, 2005
Recently, increased interest has focused on the diagnostic potential of volatile organic compounds (VOC) exhaled in human breath as this substance group has been conjectured in indoor air quality and disease screening. Proton transfer reaction-mass spectrometry (PTR-MS) has been established as a new tool for a rapid determination of exhaled air profile.
Moser, Berthold, Bodrogi, Florian, Eibl, Guenther, Lechner, Matthias, Rieder, Josef, Lirk, Philipp   +5 more
openaire   +2 more sources

Real-time quantification of emissions of volatile organic compounds from land spreading of pig slurry measured by PTR-MS and wind tunnels.

Science of the Total Environment, 2018
Volatile organic compounds (VOC) and hydrogen sulfide are emitted from land spreading of manure slurry to the atmosphere and contribute to odour nuisance, particle formation and tropospheric ozone formation.
Dezhao Liu, T. Nyord, Li Rong, A. Feilberg   +3 more
semanticscholar   +1 more source

Real-time analysis of intermediate products from non-thermal plasma degradation of ethyl acetate in air using PTR-MS: Performance evaluation and mechanism study.

Chemosphere, 2020
Non-thermal plasma (NTP) has developed into an emerging end-of-pipe technology for treating volatile organic compounds (VOCs) present in unhygienic point source of air streams.
Teng Guo, Guoxin Cheng, G. Tan, L. Xu, Zhengxu Huang, P. Cheng, Zhen Zhou   +6 more
semanticscholar   +1 more source

Detection of the spoiling of meat using PTR–MS

International Journal of Mass Spectrometry, 2003
Abstract Using the recently developed proton transfer reaction–mass spectrometer (PTR–MS) method, we investigated the spoiling of air- and vacuum-packed meat (beef, pork, and poultry) that was stored at 4 °C for up to 13 days. We measured and identified partly the emitted volatile organic compounds (VOCs) as a function of storage time and found a ...
D Mayr, R Margesin, F Schinner, T.D Märk   +3 more
openaire   +1 more source

Development of microwave plasma proton transfer reaction mass spectrometry (MWP-PTR-MS) for on-line monitoring of volatile organic compounds: Design, characterization and performance evaluation.

Talanta: The International Journal of Pure and Applied Analytical Chemistry, 2020
Proton transfer reaction mass spectrometry (PTR-MS) is a revolutionary on-line VOCs monitoring method. In this study, a new microwave plasma-based proton transfer reaction mass spectrometry (MWP-PTR-MS) is developed.
Zhongjun Zhao, Jianxiong Dai, Tianzhi Wang, Guanghui Niu, Feiyao He, Y. Duan   +5 more
semanticscholar   +1 more source

Efficient Feature Selection for PTR-MS Fingerprinting of Agroindustrial Products

2008
We recently introduced the Random Forest - Recursive Feature Elimination (RF-RFE) algorithm for feature selection. In this paper we apply it to the identification of relevant features in the spectra (fingerprints) produced by Proton Transfer Reaction - Mass Spectrometry (PTR-MS) analysis of four agro-industrial products (two datasets with cultivars of ...
Granitto, P. M., Biasioli, F., Furlanello, C., Gasperi, F.   +3 more
openaire   +3 more sources