Formation of nitrogen-containing gas phase products from the heterogeneous (photo)reaction of NO₂ with gallic acid.

ABSTRACT: Heterogeneous reaction of gas phase NO₂ with atmospheric humic-like substances (HULIS) is potentially an important source of volatile organic compounds (VOCs) including nitrogen (N)-containing compounds, a class of brown carbon of emerging importance. However, the role of ubiquitous water-soluble aerosol components in this multiphase chemistry, namely nitrate and iron ions, remains largely unexplored. Here, we used secondary electrospray ionization ultrahigh-resolution mass spectrometry for real-time measurements of VOCs formed during the heterogeneous reaction of gas phase NO₂ with a solution containing gallic acid (GA) as a proxy of HULIS at pH 5 relevant for moderately acidic aerosol particles. Results showed that the number of detected N-containing organic compoun

SUBMITTER: Li P 

PROVIDER: S-EPMC10505156 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature