PMID- 31083926 OWN - NLM STAT- MEDLINE DCOM- 20190917 LR - 20190917 IS - 1520-5851 (Electronic) IS - 0013-936X (Linking) VI - 53 IP - 11 DP - 2019 Jun 4 TI - Molecular Characterization and Source Identification of Atmospheric Particulate Organosulfates Using Ultrahigh Resolution Mass Spectrometry. PG - 6192-6202 LID - 10.1021/acs.est.9b02628 [doi] AB - Organosulfates (OSs) have been observed as substantial constituents of atmospheric organic aerosol (OA) in a wide range of environments; however, the chemical composition, sources, and formation mechanism of OSs are still not well understood. In this study, we first created an "OS precursor map" based on the elemental composition of previous OS chamber experiments. Then, according to this "OS precursor map", we estimated the possible sources and molecular structures of OSs in atmospheric PM(2.5) (particles with aerodynamic diameter