Elemental analysis of chamber organic aerosol using an aerodyne high-resolution aerosol mass spectrometer
Chhabra, PS; Flagan, RC; Seinfeld, JH
HERO ID
1699557
Reference Type
Journal Article
Year
2010
Language
English
| HERO ID | 1699557 |
|---|---|
| In Press | No |
| Year | 2010 |
| Title | Elemental analysis of chamber organic aerosol using an aerodyne high-resolution aerosol mass spectrometer |
| Authors | Chhabra, PS; Flagan, RC; Seinfeld, JH |
| Journal | Atmospheric Chemistry and Physics |
| Volume | 10 |
| Issue | 9 |
| Page Numbers | 4111-4131 |
| Abstract | The elemental composition of laboratory chamber secondary organic aerosol (SOA) from glyoxal uptake, alpha-pinene ozonolysis, isoprene photooxidation, single-ring aromatic photooxidation, and naphthalene photooxidation is evaluated using Aerodyne high-resolution time-of-flight mass spectrometer data. SOA O/C ratios range from 1.13 for glyoxal uptake experiments to 0.30-0.43 for alpha-pinene ozonolysis. The elemental composition of alpha-pinene and naphthalene SOA is also confirmed by offline mass spectrometry. The fraction of organic signal at m/z 44 is generally a good measure of SOA oxygenation for alpha-pinene/O(3), isoprene/high-NO(x), and naphthalene SOA systems. The agreement between measured and estimated O/C ratios tends to get closer as the fraction of organic signal at m/z 44 increases. This is in contrast to the glyoxal uptake system, in which m/z 44 substantially underpredicts O/C. Although chamber SOA has generally been considered less oxygenated than ambient SOA, single-ring aromatic- and naphthalene-derived SOA can reach O/C ratios upward of 0.7, well within the range of ambient PMF component OOA, though still not as high as some ambient measurements. The spectra of aromatic and isoprene-high-NO(x) SOA resemble that of OOA, but the spectrum of glyoxal uptake does not resemble that of any ambient organic aerosol PMF component. |
| Doi | 10.5194/acp-10-4111-2010 |
| Wosid | WOS:000277601700003 |
| Url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-77951966624&doi=10.5194%2facp-10-4111-2010&partnerID=40&md5=4652531c6758de0e88da8acfb5853f82 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000277601700003 |
| Is Public | Yes |
| Language Text | English |
| Keyword | Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Laboratories; Atmospheric Chemistry; Absorption; Mass Spectrometry; Ozonolysis; Organic aerosols in atmosphere; Spectral analysis; Aromatics; Naphthalene; Spectrometers; Aerosols; Oxygenation; Photooxidation; M2 551.510.42:Air Pollution (551.510.42); Q2 09185:Organic compounds; SW 5010:Network design; AQ 00006:Sewage |