ARS | Publication request: Reaction mechanisms of secondary and tertiary amines with OH and NO3 radicals

Submitted to: American Chemical Society National Meeting
Publication Type: Abstract Only
Publication Acceptance Date: January 3, 2012
Publication Date: March 28, 2012
Citation: Price, D.J., Tang, X., Silva, P.J., Purvis-Roberts, K.L., Cocker, D.R. 2012. Reaction mechanisms of secondary and tertiary amines with OH and NO3 radicals. American Chemical Society National Meeting. Abstract Only.

Technical Abstract: Emissions of aliphatic amines are common near agricultural facilities such as animal feed lots. Determining the reactions of these amines with common atmospheric radicals is important to understanding both daytime and nighttime atmospheric chemistry. Several smog chamber experiments were conducted in which aliphatic tertiary and secondary amines were reacted with either hydroxyl radical (OH) or nitrate radical (NO3) in both dry and humid conditions. Chemical composition of the aerosol products was obtained with a High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS). A number of mass spectra showed highly oxidized fragments at much higher mass than the amine precursor. These larger compounds were formed through peroxy radical reactions or hydrogen rearrangement pathways. Another major reaction pathway observed was the formation of amine salts. In the humid NO3 experiments, there was an increase in salt production along with the addition of acid catalyzed aqueous reactions.