AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Product Identification of Reactions Between Small Atmospheric Carbonyls and Ammonium Sulfate
MELISSA GALLOWAY, Daisy Grace, Jessica Ackendorf, Rachael Holappa, Lafayette College
Abstract Number: 788 Working Group: Aerosol Chemistry
Abstract The chemical composition of atmospheric aerosol is complex and poorly understood. Aqueous reactions of aldehydes with amines or ammonium salts have been implicated in atmospheric brown carbon formation processes. Recent work has started to identify the products of these reactions, especially those responsible for visible light absorbance. However, few studies have looked at the reaction products of ammonium with a mixture of aldehydes. A variety of techniques, including NMR spectroscopy and ESI-MS, are used to identify the reaction products of mixture of small, water soluble carbonyls (e.g. glyoxal, methylglyoxal, and glycolaldehyde) with ammonium sulfate. We present structural and mass comparisons between products formed from the reaction of a single aldehyde with ammonium and a mixture of aldehydes and ammonium sulfate. The results of these studies will allow us to better understand the aqueous chemistry occurring in atmospheric aerosol droplets.