Results 221 to 230 of about 27,664 (259)

Detection of isocyanates and polychlorinated biphenyls using proton transfer reaction mass spectrometry

Rapid Communications in Mass Spectrometry, 2012
RATIONALE Isocyanates are highly reactive species widely used in industry. They can cause irritation of the eyes, trigger asthma, etc. Polychlorinated biphenyls (PCBs) were widely used in electrical equipments like capacitors and transformers in the last century and are still present in the environment today ...
B, Agarwal, S, Jürschik, P, Sulzer, F, Petersson, S, Jaksch, A, Jordan, T D, Märk   +6 more
openaire   +2 more sources

Application of proton-transfer-reaction-mass-spectrometry for Indoor Air Quality research

Indoor Air, 2013
In the field of Indoor Air Quality research, the measurement of volatile organic compounds (VOCs) demands instruments that are rapid, mobile, robust, highly sensitive and allow for simultaneous monitoring of multiple compounds. These instruments should also compensate for possible interferences from permanent gases and air humidity.
T, Schripp, S, Etienne, C, Fauck, F, Fuhrmann, L, Märk, T, Salthammer   +5 more
openaire   +2 more sources

Implementation of proton transfer reaction‐mass spectrometry (PTR‐MS) for advanced bioprocess monitoring

Biotechnology and Bioengineering, 2012
AbstractWe report on the implementation of proton transfer reaction‐mass spectrometry (PTR‐MS) technology for on‐line monitoring of volatile organic compounds (VOCs) in the off‐gas of bioreactors. The main part of the work was focused on the development of an interface between the bioreactor and an analyzer suitable for continuous sampling of VOCs ...
Markus, Luchner, Rene, Gutmann, Karl, Bayer, Jürgen, Dunkl, Armin, Hansel, Jens, Herbig, Wolfgang, Singer, Florian, Strobl, Klaus, Winkler, Gerald, Striedner   +9 more
openaire   +2 more sources

Analysing the headspace of coffee by proton-transfer-reaction mass-spectrometry

International Journal of Mass Spectrometry, 2003
Abstract An extensive analysis of the headspace (HS) of coffee brew using proton-transfer-reaction mass-spectrometry (PTR-MS) is presented. In particular, we present a set of methods that link mass spectral peaks, as observed in PTR-MS, to chemical compounds in the HS of coffee.
Chahan Yeretzian, Alfons Jordan, Werner Lindinger   +2 more
openaire   +1 more source

Determination of Gas Phase Isocyanates Using Proton Transfer Reaction Mass Spectrometry

Analytical Chemistry Letters, 2011
Isocyanates are mainly used in the industry for the production of polyurethane (PUR) plastics. Workers are at risk of being exposed during the manufacturing of PUR. During thermal degradation of PUR, isocyanates are released and workers involved in hot work such as fire-fighting, welding etc.
Daniel Gylestam, Daniel Karlsson, Marianne Dalene, Gunnar Skarping   +3 more
openaire   +1 more source

Proton transfer reaction mass spectrometry (PTR-MS): propanol in human breath

International Journal of Mass Spectrometry and Ion Processes, 1996
Abstract Proton transfer reaction mass spectrometry (PTR-MS) based on reactions of H 3 O + ions has been used to measure the concentrations of propanol in 46 healthy persons, yielding an average concentration of about 150 ppb. That the measurements were not obscured by other components of the same mass as propanol was proven by comparison of PTR-MS
C Warneke, J. Kuczynski, A. Hansel, A Jordan, W. Vogel, W. Lindinger   +5 more
openaire   +1 more source

Assessment of Trentingrana cheese ageing by proton transfer reaction-mass spectrometry and chemometrics

International Dairy Journal, 2007
Proton transfer reaction-mass spectrometry (PTR-MS) data have been analysed by chemometric techniques to monitor cheese ageing by means of on-line direct head-space gas analysis. Twenty cheese loaves of Trentingrana, a trademarked cheese produced in northern Italy, of different origin and ripening degree, were sampled over the whole Trentingrana ...
Aprea, Eugenio, Biasioli, Franco, Gasperi, Flavia, Mott, Daniela, Marini, F., Märk, T. D.   +5 more
openaire   +3 more sources

Using Proton Transfer Reaction Mass Spectrometry for Online Analysis of Secondary Organic Aerosols

Environmental Science & Technology, 2008
Proton-transfer-reaction mass spectrometry (PTR-MS) is a useful tool in ambient trace gas analysis, especially for the analysis of oxygenated volatile organic compounds (OVOC). Many OVOCs are produced during photooxidation of volatile organic compounds and contribute to both the gas phase and secondary organic aerosols (SOA).
Heidi, Hellén, Josef, Dommen, Axel, Metzger, Astrid, Gascho, Jonathan, Duplissy, Torsten, Tritscher, Andre S H, Prevot, Urs, Baltensperger   +7 more
openaire   +2 more sources

Proton Transfer Reaction Mass Spectrometry of Exhaled Breath in Diagnostics of Heart Failure

Kardiologiia, 2016
Exhaled breath analysis is one of directions in the search for novel biomarkers of chronic heart failure (CHF). According.
Ph Yu, Kopylov, A L, Syrkin, P Sh, Chomakhidze, A A, Bykova, D, Yu Shhekochihin, Yu R, Shaltaeva, V V, Belyakov, V S, Pershenkov, N N, Samotaev, A V, Golovin, V K, Vasil'ev, E K, Malkin, E A, Gromov, I A, Ivanov, D Ju, Lipatov, D Ju, Yakovlev, V B, Betelin   +16 more
openaire   +2 more sources

Quantification of recent smoking behaviour using proton transfer reaction-mass spectrometry (PTR-MS)

Wiener Klinische Wochenschrift, 2004
Smoking is the most important single risk factor in current public health. Surveillance of exposure to tobacco smoke may be accomplished using environmental monitoring or in-vivo tests for smoking biomarkers. Acetonitrile exhaled in human breath has been described as a potential marker mirroring recent smoking behavior.
Lirk, Philipp, Bodrogi, Florian, Deibl, Martina, Kähler, Christian M., Colvin, Joshua, Moser, Berthold, Pinggera, Germar, Raifer, Hartmann, Rieder, Josef, Schobersberger, Wolfgang   +9 more
openaire   +3 more sources