(136d) Studies of Atmospheric Aerosol Chemistry Using Aerosol Chemical Ionization Mass Spectrometry

This talk will highlight the use of Aerosol Chemical Ionization Mass Spectrometry (Aerosol-CIMS) as enabling technology for the study of atmospheric aerosol chemistry.  Aerosol-CIMS is particularly well-suited for laboratory studies of aerosol organics; chemical ionization leads to low fragmentation, enabling speciated measurements of organic species with the high sensitivity and fast time response of CIMS.  Recent work in which Aerosol-CIMS was used to study the formation of organosulfates, oligomers, and nitrogen-containing species in secondary organic aerosols will be discussed, as well as the application of Aerosol-CIMS to study the oxidative aging of organic aerosol material.  Application of Aerosol CIMS to the analysis of ambient aerosols will be discussed.