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Time-Resolved Molecular Characterization of Limonene/Ozone Aerosol using High-Resolution Electrospray Ionization Mass Spectrometry

Journal Article · · Physical Chemistry Chemical Physics. PCCP, (11):7931-7942
DOI:https://doi.org/10.1039/b905288g· OSTI ID:965531
Molecular composition of limonene/O3 secondary organic aerosol (SOA) was investigated using high-resolution electrospray ionization mass spectrometry (HR-ESI-MS) as a function of reaction time. SOA was generated by ozonation of D-limonene in a reaction chamber and sampled at different time intervals using a cascade impactor. The SOA samples were extracted into acetonitrile and analyzed using a HR-ESI-MS instrument with a resolving power of 100,000 (m/Δm). The resulting mass spectra provided detailed information about the extent of oxidation inferred from the O:C ratios, double bond equivalency (DBE) factors, and aromaticity indexes (AI) in hundreds of identified individual SOA species.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
965531
Report Number(s):
PNNL-SA-65332; 24392; KP1704020
Journal Information:
Physical Chemistry Chemical Physics. PCCP, (11):7931-7942, Journal Name: Physical Chemistry Chemical Physics. PCCP, (11):7931-7942 Vol. 11; ISSN 1463-9076
Country of Publication:
United States
Language:
English

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