Results 161 to 170 of about 1,345,257 (199)

Geographical origin classification of olive oils by PTR-MS

Food Chemistry, 2008
Abstract The volatile compositions of 192 olive oil samples from five different European countries were investigated by PTR-MS sample headspace analysis. The mass spectra of all samples showed many masses with high abundances, indicating the complex VOC composition of olive oil.
Araghipour, N., Colineau, J., Koot, A.H., Akkermans, W., Rojas, J.M.M., Beauchamp, J., Wisthaler, A., Märk, T.D., Downey, G., Guillou, C., Mannina, L., van Ruth, S.M.   +11 more
openaire   +5 more sources

Characterization of the dynamics of volatile organic compounds released by lactic acid bacteria on modified atmosphere packed beef by PTR-MS

, 2019
Meat spoilage is a very complex process influenced by many yet not fully characterized factors. To improve the desired characterization especially knowledge about the generation of volatile organic compounds (VOCs) is of great importance since they ...
Corinna Franke, M. Hilgarth, R. Vogel, H. Petermeier, Horst-Christian Langowski   +4 more
semanticscholar   +1 more source

New Perspectives on CO2, Temperature, and Light Effects on BVOC Emissions Using Online Measurements by PTR-MS and Cavity Ring-Down Spectroscopy.

Environmental Science and Technology, 2018
Volatile organic compounds (VOC) play important roles in atmospheric chemistry, plant ecology, and physiology, and biogenic VOC (BVOC) emitted by plants is the largest VOC source.
Jianbei Huang, H. Hartmann, H. Hellén, A. Wisthaler, E. Perreca, A. Weinhold, A. Rücker, N. V. van Dam, J. Gershenzon, S. Trumbore, T. Behrendt   +10 more
semanticscholar   +1 more source

Quality control of a herb extract using PTR-MS

International Journal of Mass Spectrometry, 2004
Abstract We have developed an objective method for the determination of a herb extract's quality based on headspace measurements by proton-transfer-reaction mass spectrometry (PTR-MS); this quality was checked by a sensory analysis until now. This novel method enables the company ‘Bionorica’ to ensure that they are only selling high-quality products ...
D. Jaksch, E. Hartungen, T. Mikoviny, G. Abel, T.D. Märk   +4 more
openaire   +1 more source

Investigations on the variability of breath gas sampling using PTR-MS

Journal of Breath Research, 2009
Breath gas analysis is a promising technology in the frame of medical diagnostics. By identifying disease-specific biomarkers in the breath of patients, a non-invasive and easy method for early diagnosis or therapy monitoring might be developed. However, to verify this potential and develop diagnostic tools based on breath gas analysis one essential ...
B, Thekedar, W, Szymczak, V, Höllriegl, C, Hoeschen, U, Oeh   +4 more
openaire   +2 more sources

PTR-MS monitoring of odour emissions from composting plants

International Journal of Mass Spectrometry, 2004
Abstract We studied the possibility of monitoring with proton transfer reaction-mass spectrometry (PTR-MS) odours emitted in various situations related to composting plants of municipal solid waste (MSW), i.e., waste storage, waste management, and biofilters.
Biasioli, Franco, Gasperi, Flavia, Odorizzi, Gino, Aprea, Eugenio, Mott, Daniela, Marini, F., Autiero, G., Rotondo, G., Märk, T. D.   +8 more
openaire   +5 more sources

Rapid and noninvasive quality control of anhydrous milk fat by PTR-MS: The effect of storage time and packaging.

Journal of Mass Spectrometry, 2018
In this study, proton transfer reaction-mass spectrometry (PTR-MS), coupled with a time-of-flight mass analyzer and a multipurpose automatic sampler, was evaluated as a rapid and nondestructive tool for the quality control of anhydrous milk fat ...
M. Pedrotti, I. Khomenko, L. Cappellin, M. Fontana, M. Somenzi, L. Falchero, M. Arveda, V. Fogliano, F. Biasioli   +8 more
semanticscholar   +1 more source

Headspace measurements of irradiated in vitro cultured cells using PTR-MS

Radiation and Environmental Biophysics, 2010
A pilot study was performed to evaluate a new concept for a radiation biodosimetry method. Proton transfer reaction-mass spectrometry (PTR-MS) was used to find out whether radiation induces changes in the composition of volatile organic compounds (VOCs) in the headspace of in vitro cultured cells.
C, Brunner, W, Szymczak, W, Li, C, Hoeschen, S, Mörtl, F, Eckardt-Schupp, U, Oeh   +6 more
openaire   +2 more sources

Real-time monitoring of removal of trace compounds with PTR-MS: Biochar experimental investigation

Renewable Energy, 2018
The removal of trace compounds contained in a biogas from the dry anaerobic digestion of organic waste was accomplished. The resulting data were monitored online with a direct injection mass spectrometry technique. Biochar from the pyrolysis of recovered
D. Papurello, A. Boschetti, S. Silvestri, I. Khomenko, F. Biasioli   +4 more
semanticscholar   +1 more source

PTR-MS in enology: Advances in analytics and data analysis

International Journal of Mass Spectrometry, 2007
Abstract The present communication deals with the improvement of proton transfer reaction mass spectrometry (PTR-MS) wine headspace analyses. In contrast to previous PTR-MS investigations of wine, where wine headspace was ionized by protonated ethanol clusters, the headspace was diluted by a factor of 1:40 with N2 and ionized by H3O+ ions.
Renate Spitaler, Nooshin Araghipour, Tomas Mikoviny, Armin Wisthaler, Josef Dalla Via, Tilmann D. Märk   +5 more
openaire   +1 more source