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Scientific Articles - PTR-MS Bibliography

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Found 37 results
Title [ Year(Asc)]
Filters: Author is Hansel, A  [Clear All Filters]
2001
[Laat2001] de Laat, ATJ., JA. de Gouw, J. Lelieveld, and A. Hansel, "Model analysis of trace gas measurements and pollution impact during INDOEX", Journal of Geophysical Research: Atmospheres (1984–2012), vol. 106, no. D22: Wiley Online Library, pp. 28469–28480, 2001.
Link: http://adsabs.harvard.edu/abs/2001JGR...10628469D
Abstract
An analysis of acetone (CH3COCH3) and acetonitrile (CH3CN) measurements, performed during the Indian Ocean Experiment (INDOEX), using a chemistry general circulation model is presented. A comparison with measurements indicates that the model simulates realistic CO and acetone distributions, except toward the Indian west coast near the surface. The latter may be related to a sea breeze circulation at the Indian west coast, which is not resolved by the model. A comparison of the measured and modeled correlation between CO and acetone indicates the presence of a background marine acetone source. A model sensitivity study suggests a global marine emission strength of 15-20 Tg acetone yr-1, which is a significant contribution to the estimated global acetone source of 56 (37-80) Tg acetone yr-1. The comparison of measured and modeled CO-acetonitrile correlation from surface measurements indicates that a model sink of acetonitrile in the marine boundary layer is missing. A model sensitivity study suggests that this could be dry deposition (deposition velocity estimate: 0.01-0.05 cms-1) on the ocean surface. A comparison of measured and modeled tropospheric acetonitrile indicates that the model overestimates the free tropospheric acetonitrile mixing ratios up to a factor of 3, which points to a missing free tropospheric sink of acetonitrile in the model. A possible explanation may be stratospheric loss and subsequent stratosphere-troposphere exchange, which was not included in the model.
[Andreae2001] Andreae, MO., P. Artaxo, H. Fischer, , J-M. Grégoire, A. Hansel, P. Hoor, R. Kormann, R. Krejci, L. Lange, et al., "Transport of biomass burning smoke to the upper troposphere by deep convection in the equatorial region", Geophysical Research Letters, vol. 28, no. 6: Wiley Online Library, pp. 951–954, 2001.
Link: http://onlinelibrary.wiley.com/doi/10.1029/2000GL012391/full
2000
[Crutzen2000] Crutzen, PJ., J. Williams, U. Poeschl, P. Hoor, H. Fischer, C. Warneke, R. Holzinger, A. Hansel, W. Lindinger, B. Scheeren, et al., "High spatial and temporal resolution measurements of primary organics and their oxidation products over the tropical forests of Surinam", Atmospheric environment, vol. 34, no. 8: Elsevier, pp. 1161–1165, 2000.
Link: http://www.sciencedirect.com/science/article/pii/S1352231099004823
Abstract
Tropical forests with emissions greater than 1015 g C of reactive hydrocarbons per year strongly affect atmospheric chemistry. Here we report aircraft-borne measurements of organics during March 1998 in Surinam, a largely unpolluted region which is optimally located to study chemical processes induced by tropical forest emissions. Isoprene and its degradation products methylvinyl ketone (MVK) and methacrolein (MACR) and possibly isoprene hydroperoxides (ISOHP), were measured in the nmol mol−1 volume mixing ratio (VMR) range, consistent with estimated emissions and model calculations. In addition, high VMRs of some non-isoprene-derived organics were measured, such as acetone (≈2–4 nmol mol1 up to 12 km altitude), an important source of HO and HO2 in the upper troposphere. Moreover, several masses were measured at significant mixing ratios which could not be identified by reference to previous field measurements or gas-phase isoprene chemistry. High VMRs, almost 0.4 nmol mol−1, were also recorded for a compound which is most likely dimethyl sulphide (DMS). If so, boundary layer loss of HO by reactions with hydrocarbons and their oxidation products strongly prolongs the lifetime of DMS, allowing its transport deep into the Amazon forest south of the intertropical convergence zone (ITCZ). We postulate greater sulphate production and deposition north than south of the (ITCZ) with possible consequences for cloud and ecosystem properties.
1999
[Hansel1999] Hansel, A., A. Jordan, C. Warneke, R. Holzinger, A. Wisthaler, and W. Lindinger, "Proton-transfer-reaction mass spectrometry (PTR-MS): on-line monitoring of volatile organic compounds at volume mixing ratios of a few pptv", Plasma Sources Science and Technology, vol. 8, no. 2: IOP Publishing, pp. 332, 1999.
Link: http://iopscience.iop.org/0963-0252/8/2/314
[Boschetti1999] Boschetti, A., F. Biasioli, M. Van Opbergen, C. Warneke, A. Jordan, R. Holzinger, P. Prazeller, T. Karl, A. Hansel, W. Lindinger, et al., "PTR-MS real time monitoring of the emission of volatile organic compounds during postharvest aging of berryfruit", Postharvest Biology and Technology, vol. 17, no. 3: Elsevier, pp. 143–151, 1999.
Link: http://www.sciencedirect.com/science/article/pii/S0925521499000526
1998
[Hansel1998] Hansel, A., A. Jordan, C. Warneke, R. Holzinger, and W. Lindinger, "Improved detection limit of the proton-transfer reaction mass spectrometer: On-line monitoring of volatile organic compounds at mixing ratios of a few pptv", Rapid communications in mass spectrometry, vol. 12, no. 13: Wiley Online Library, pp. 871–875, 1998.
Link: http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1097-0231(19980715)12:13%3C871::AID-RCM245%3E3.0.CO;2-L/abstract
[Prazeller1998] Prazeller, P., T. Karl, A. Jordan, R. Holzinger, A. Hansel, and W. Lindinger, "Quantification of passive smoking using proton-transfer-reaction mass spectrometry", International journal of mass spectrometry, vol. 178, no. 3: Elsevier, pp. L1–L4, 1998.
Link: http://www.sciencedirect.com/science/article/pii/S1387380698141532
1997
[Lindinger1997a] Lindinger, W., and A. Hansel, "Analysis of trace gases at ppb levels by proton transfer reaction mass spectrometry (PTR-MS)", Plasma Sources Science and Technology, vol. 6, no. 2: IOP Publishing, pp. 111, 1997.
Link: http://iopscience.iop.org/0963-0252/6/2/004
Abstract
A proton transfer reaction mass spectrometry (PTR-MS) system has been developed which allows for on-line measurements of trace gas components with concentrations as low as 1 ppb. The method is based on reactions of H3O+ ions, which perform non-dissociative proton transfer to most of the common organic trace constituents but do not react with any of the components present in clean air. Examples of medical applications by means of breath analysis, examples of environmental trace gas analysis and examples in the field of food chemistry demonstrate the wide applicability of the method.
[Lindinger1997] Lindinger, W., J. Taucher, A. Jordan, A. Hansel, and W. Vogel, "Endogenous production of methanol after the consumption of fruit", Alcoholism: Clinical and Experimental Research, vol. 21, no. 5: Wiley Online Library, pp. 939–943, 1997.
Link: http://onlinelibrary.wiley.com/doi/10.1111/j.1530-0277.1997.tb03862.x/abstract
Abstract
After the consumption of fruit, the concentration of methanol in the human body increases by as much as an order of magnitude. This is due to the degradation of natural pectin (which is esterified with methyl alcohol) in the human colon. In vivo tests performed by means of proton-transfer-reaction mass spectrometry show that consumed pectin in either a pure form (10 to 15 g) or a natural form (in 1 kg of apples) induces a significant increase of methanol in the breath (and by inference in the blood) of humans. The amount generated from pectin (0.4 to 1.4 g) is approximately equivalent to the total daily endogenous production (measured to be 0.3 to 0.6 g/day) or that obtained from 0.3 liters of 80-proof brandy (calculated to be 0.5 g). This dietary pectin may contribute to the development of nonalcoholic cirrhosis of the liver.
[Hansel1997] Hansel, A., W. Singer, A. Wisthaler, M. Schwarzmann, and W. Lindinger, "Energy dependencies of the proton transfer reactions H3O++ CH2O CH2OH++ H2O", International journal of mass spectrometry and ion processes, vol. 167: Elsevier, pp. 697–703, 1997.
Link: http://www.sciencedirect.com/science/article/pii/S0168117697001286
Abstract
The proton transfer reaction system View the MathML source has been investigated in both directions as a function of the mean relative kinetic energy, KEcm, between the reactants from 0.05 eV to 1 eV in a selected ion flow drift tube (SIFDT) experiment. The rate constant kf for the forward channel follows closely the calculated collisional limiting value, kc, showing a slightly negative energy dependence. The rate constant, kr, for the reverse channel, which is endoergic by 5.2 kcal mol−1, increases from kr = 2.3 × 10−12 cm3 s−1 at KEcm = 0.05 eV to kr = 2 × 10−10 cm3 s−1 at KEcm = 1 eV. This endoergic reaction is paralleled by an associative channel forming CH2OH+·H2O, which undergoes ligand switching with water molecules to produce H3O+·H2O, yielding a bond energy BE(CH2OH+−H2O) = 27.7 kcal mol−1 in agreement with previous data. The present results are important requisites to monitor the formaldehyde concentrations in air using proton transfer reactionmass spectrometry (PTR-MS).
1996
[Warneke1996] Warneke, C., J. Kuczynski, A. Hansel, A. Jordan, W. Vogel, and W. Lindinger, "Proton transfer reaction mass spectrometry (PTR-MS): propanol in human breath", International journal of mass spectrometry and ion processes, vol. 154, no. 1: Elsevier, pp. 61–70, 1996.
Link: http://www.sciencedirect.com/science/article/pii/0168117696043698
Abstract
Proton transfer reaction mass spectrometry (PTR-MS) based on reactions of H3O+ 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 data with separate selected-ion flow-drift tube (SIFDT) investigations of the energy dependences of reactions of H3O+ and H3O+·H2O with isopropanol, n-propanol, acetic acid and methyl formate.
1995
[Taucher1995] Taucher, J., A. Lagg, A. Hansel, W. Vogel, and W. Lindinger, "Methanol in human breath", Alcoholism: Clinical and Experimental Research, vol. 19, no. 5: Wiley Online Library, pp. 1147–1150, 1995.
Link: http://onlinelibrary.wiley.com/doi/10.1111/j.1530-0277.1995.tb01593.x/abstract
Abstract
Using proton transfer reaction-mass spectrometry for trace gas analysis of the human breath, the concentrations of methanol and ethanol have been measured for various test persons consuming alcoholic beverages and various amounts of fruits, respectively. The methanol concentrations increased from a natural (physiological) level of ∼ 0.4 ppm up to ∼ 2 ppm a few hours after eating about 1/2 kg of fruits, and about the same concentration was reached after drinking of 100 ml brandy containing 24% volume of ethanol and 0.19% volume of methanol.

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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).
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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.
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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.
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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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