Trends in the oxidation and relative volatility of chamber-generated secondary organic aerosol.

ABSTRACT: The relationship between the oxidation state and relative volatility of secondary organic aerosol (SOA) from the oxidation of a wide range of hydrocarbons is investigated using a fast-stepping, scanning thermodenuder interfaced with a high-resolution time-of-flight aerosol mass spectrometer (AMS). SOA oxidation state varied widely across the investigated range of parent hydrocarbons but was relatively stable for replicate experiments using a single hydrocarbon precursor. On average, unit mass resolution indicators of SOA oxidation (e.g., AMS f ₄₃ and f ₄₄) are consistent with previously reported values. Linear regression of H:C vs. O:C obtained from parameterization of f ₄₃ and f ₄₄ and elemental analysis of high-resol

SUBMITTER: Docherty KS 

PROVIDER: S-EPMC6827343 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature