Molecular Characterization of Organosulfur Compounds in Biodiesel and Diesel Fuel Secondary Organic Aerosol

• DOI: 10.1021/acs.est.6b03304
• Publication Date: 2016-12-08T10:12:39Z
• Authors: Sandra L. Blair; Amanda C. MacMillan; Greg T. Drozd; Allen H. Goldstein; Rosalie K. Chu; Ljiljana Paša-Tolić; Jared B. Shaw; Nikola Tolić; Peng Lin; Julia Laskin; Alexander Laskin; Sergey A. Nizkorodov
• Keywords: Organosulfur compounds

Secondary organic aerosol (SOA), formed in the photooxidation of diesel fuel, biodiesel and 20% fuel/80% fuel mixture, are prepared under high-NOx conditions presence absence sulfur dioxide (SO2), ammonia (NH3), relative humidity (RH). The composition condensed-phase compounds SOA is measured using several complementary techniques including mass spectrometry (AMS), high-resolution nanospray desorption electrospray ionization (nano-DESI/HRMS), ultrahigh resolution accuracy 21T Fourier transform ion cyclotron resonance (21T FT-ICR MS). Results demonstrate that sulfuric acid condensed organosulfur species experiments with SO2 present particles. Fewer high experiments, performed at RH 90%, comparison done dry conditions. There a strong overlap observed this study previous field chamber studies SOA. Many MS peaks organosulfates (R–OS(O)2OH) previously designated as biogenic or unknown origin might have originated from anthropogenic sources, such hydrocarbons fuel.