| Title: | Ion mobility distributions during the initial stages of new particle formation by the ozonolysis of alpha-pinene |
| Author(s): | Viitanen AK; Saukko E; Virtanen A; Yli-Pirilaa P; Smith JN; Joutsensaari J; Makela JM; |
| Address: | "Aerosol Physics Laboratory, Department of Physics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland. anna-kaisa.viitanen@tut.fi" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "An ion mobility spectrometer (IMS) was used to study gas phase compounds during nucleation and growth of secondary organic aerosols (SOA). In this study SOA particles were generated by oxidizing alpha-pinene with O(3) and OH in a 6 m(3) reaction chamber. Positive ion peaks with reduced mobilities of 1.59 cm(2)(Vs)(-1) and 1.05 cm(2)(Vs)(-1) were observed 7 min after alpha-pinene and ozone were added to the chamber. The detected compounds can be associated with low volatility oxidation products of alpha-pinene, which have been suggested to participate in new particle formation. This is the first time that IMS has been applied to laboratory studies of SOA formation. IMS was found suitable for continuous online monitoring of the SOA formation process, allowing for highly sensitive detection of gas phase species that are thought to initiate new particle formation" |
| Keywords: | Aerosols/*chemistry Air Pollutants/*chemistry Bicyclic Monoterpenes Catalysis Gas Chromatography-Mass Spectrometry Ions/chemistry Monoterpenes/*chemistry Ozone/*chemistry Particle Size; |
| Notes: | "MedlineViitanen, Anna-Kaisa Saukko, Erkka Virtanen, Annele Yli-Pirilaa, Pasi Smith, James N Joutsensaari, Jorma Makela, Jyrki M eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2010/11/11 Environ Sci Technol. 2010 Dec 1; 44(23):8917-23. doi: 10.1021/es101572u. Epub 2010 Nov 9" |
