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Scientific Articles - PTR-MS Bibliography

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[1530] Barmet, P.., J.. Dommen, P.. F. DeCarlo, T.. Tritscher, A.. P. Praplan, S.. M. Platt, A.. S. H. Prevot, N.. M. Donahue, and U.. Baltensperger, "OH clock determination by proton transfer reaction mass spectrometry at an environmental chamber", Atmos. Meas. Tech., vol. 5, pp. 647–656, Mar, 2012.
<p>The hydroxyl free radical (OH) is the major oxidizing species in the lower atmosphere. Measuring the OH concentration is generally difficult and involves elaborate, expensive, custom-made experimental setups. Thus other more economical techniques, capable of determining OH concentrations at environmental chambers, would be valuable. This work is based on an indirect method of OH concentration measurement, by monitoring an appropriate OH tracer by proton transfer reaction mass spectrometry (PTR-MS). 3-pentanol, 3-pentanone and pinonaldehyde (PA) were used as OH tracers in α-pinene (AP) secondary organic aerosol (SOA) aging studies. In addition we tested butanol-d9 as a potential &quot;universal&quot; OH tracer and determined its reaction rate constant with OH: kbutanol-d9 = 3.4(&plusmn;0.88) &times; 10&minus;12 cm3 molecule&minus;1 s&minus;1. In order to make the chamber studies more comparable among each other as well as to atmospheric measurements we suggest the use of a chemical (time) dimension: the OH clock, which corresponds to the integrated OH concentration over time.</p>
[1529] Platt, S.M.., I.E.. Haddad, S.M.. Pieber, R.-J.. Huang, A.A.. Zardini, M.. Clairotte, R.. Suarez-Bertoa, P.. Barmet, L.. Pfaffenberger, R.. Wolf, et al., "Two-stroke scooters are a dominant source of air pollution in many cities", Nature Communications, vol. 5, May, 2014.
<p>Fossil fuel-powered vehicles emit significant particulate matter, for example, black carbon and primary organic aerosol, and produce secondary organic aerosol. Here we quantify secondary organic aerosol production from two-stroke scooters. Cars and trucks, particularly diesel vehicles, are thought to be the main vehicular pollution sources. This needs re-thinking, as we show that elevated particulate matter levels can be a consequence of &lsquo;asymmetric pollution&rsquo; from two-stroke scooters, vehicles that constitute a small fraction of the fleet, but can dominate urban vehicular pollution through organic aerosol and aromatic emission factors up to thousands of times higher than from other vehicle classes. Further, we demonstrate that oxidation processes producing secondary organic aerosol from vehicle exhaust also form potentially toxic &lsquo;reactive oxygen species&rsquo;.</p>

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Selected PTR-MS related Reviews

F. Biasioli, C. Yeretzian, F. Gasperi, T. D. Märk: PTR-MS monitoring of VOCs and BVOCs in food science and technology, Trends in Analytical Chemistry 30 (7) (2011).

J. de Gouw, C. Warneke, T. Karl, G. Eerdekens, C. van der Veen, R. Fall: Measurement of Volatile Organic Compounds in the Earth's Atmosphere using Proton-Transfer-Reaction Mass Spectrometry. Mass Spectrometry Reviews, 26 (2007), 223-257.

W. Lindinger, A. Hansel, A. Jordan: Proton-transfer-reaction mass spectrometry (PTR–MS): on-line monitoring of volatile organic compounds at pptv levels, Chem. Soc. Rev. 27 (1998), 347-375.


Lists with PTR-MS relevant publications of the University of Innsbruck can be found here: Atmospheric and indoor air chemistry, IMR, Environmental Physics and Nano-Bio-Physics


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