[Williams2001]
Williams, J., U. Poeschl, PJ. Crutzen, A. Hansel, R. Holzinger, C. Warneke, W. Lindinger, and J. Lelieveld,
"An atmospheric chemistry interpretation of mass scans obtained from a proton transfer mass spectrometer flown over the tropical rainforest of Surinam",
Journal of atmospheric chemistry, vol. 38, no. 2: Springer, pp. 133–166, 2001.
Link:
http://www.springerlink.com/index/v26n6440307112k1.pdf[Poeschl2001]
Pöschl, U., J. Williams, P. Hoor, H. Fischer, PJ. Crutzen, C. Warneke, R. Holzinger, A. Hansel, A. Jordan, W. Lindinger, et al.,
"High acetone concentrations throughout the 0–12 km altitude range over the tropical rainforest in Surinam",
Journal of atmospheric chemistry, vol. 38, no. 2: Springer, pp. 115–132, 2001.
Link:
http://link.springer.com/article/10.1023/A:1006370600615[Warneke2001a]
Warneke, C., R. Holzinger, A. Hansel, A. Jordan, W. Lindinger, U. Poeschl, J. Williams, P. Hoor, H. Fischer, PJ. Crutzen, et al.,
"Isoprene and its oxidation products methyl vinyl ketone, methacrolein, and isoprene related peroxides measured online over the tropical rain forest of Surinam in March 1998",
Journal of Atmospheric Chemistry, vol. 38, no. 2: Springer, pp. 167–185, 2001.
Link:
http://www.springerlink.com/index/u14w8w3187r33ur2.pdf[Wisthaler2001]
Wisthaler, A., NR. Jensen, R. Winterhalter, W. Lindinger, and J. Hjorth,
"Measurements of acetone and other gas phase product yields from the OH-initiated oxidation of terpenes by proton-transfer-reaction mass spectrometry (PTR-MS)",
Atmospheric Environment, vol. 35, no. 35: Elsevier, pp. 6181–6191, 2001.
Link:
http://www.sciencedirect.com/science/article/pii/S1352231001003855
The atmospheric oxidation of several terpenes appears to be a potentially relevant source of acetone in the atmosphere. Proton-transfer-reaction mass spectrometry was used as an on-line analytical method in a chamber study to measure acetone and other gas phase products from the oxidation of α- and β-pinene initiated by OH radicals in air and in the presence of NOx. Acetone may be formed promptly, following attack by the OH radical on the terpene, via a series of highly unstable radical intermediates. It can also be formed by slower processes, via degradation of stable non-radical intermediates such as pinonaldehyde and nopinone. Primary acetone and pinonaldehyde molar yields of 11±2% (one σ) and 34±9% (one σ), respectively, were found from the reaction between α-pinene and the OH radical. After all α-pinene had been consumed, an additional formation of acetone due to the degradation of stable non-radical intermediates was observed. The total amount of acetone formed was 15±2% (one σ) of the reacted α-pinene. An upper limit of 12±3% (one σ) for the acetone molar yield from the oxidation of pinonaldehyde was established. From the reaction between β-pinene and the OH radicals, primary acetone and nopinone molar yields of 13±2% (one σ) and 25±3% (one σ), respectively, were observed. Additional amounts of acetone were formed by the further degradation of the primary product, such as the most abundant product nopinone. The total amount of acetone formed was 16±2% (one σ) of the reacted β-pinene. An upper limit of 12±2% (one σ) for the acetone molar yield from the oxidation of nopinone was established. The observed product yields from α- and β-pinene are in good agreement with other studies using mass-spectrometric and gas chromatographic analytical techniques, but differ significantly from previous studies using spectroscopic methods. Possible reasons for the discrepancies are discussed.