Characterization of water-soluble organic matter in urban aerosol by ¹H-NMR spectroscopy.

ABSTRACT: The functional and ¹³C isotopic compositions of water-soluble organic carbon (WSOC) in atmospheric aerosol were determined by nuclear magnetic resonance (¹H-NMR) and isotope ratio mass spectrometry (IRMS) in an urban location in the Southern Mississippi Valley. The origin of WSOC was resolved using the functional distribution of organic hydrogen, δ¹³C ratio, and positive matrix factorization (PMF). Three factors were retained based on NMR spectral bins loadings. Two factors (factors 1 and 3) demonstrated strong associations with the aliphatic region in the NMR spectra and levoglucosan resonances. Differences between the two factors included the abundance of the aromatic functional group for factor 1, indicating fresh emissions and, for factor 3, the presenc

SUBMITTER: Chalbot MG 

PROVIDER: S-EPMC4905722 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature