USING CHEMILUMINESCENCE AND OTHER BASIC PROPERTIES TO DETECT PEROXYACYL NITRATES IN THE TROPOSPHERE

J. Christopher Baird

ABSTRACT

Peroxyacyl nitrates are important photochemical oxidants that are known to be harmful to human health. In addition, they are active participants in ozone chemistry, as they facilitate the long-range transport of NO2. This project included the examination of various general properties, such as UV/Visable spectra, IR spectra, Gas Chromatograph retention times, and intensity of light given off by reaction with the chemiluminescent compound Luminol. Particular emphasis was placed on the calibration of the Luminol system. Compared to traditional (gas chromatography) methods of PAN analysis, the Luminol system has lower detection limits and shorter retention times, allowing for faster and more sensitive detection. Five PANs were synthesized from their peracid precursors: peroxyacetyl nitrate (PAN), peroxyproponyl nitrate (PPN), peroxybutyl nitrate (PBN), peroxybenzyl nitrate (PBzN), and peroxymethacrylic nitrate (MPAN). The information gleaned from this project will help researchers to develop improved methods of detection for PANs and hopefully better understand the relationships of PANs with other pollutants.

Presentation: Using Chemiluminescence and Other Basic Properites to Detect Peroxyacyl Nitrates in the Troposphere

 
 

The Global Change Education Program is funded by the
U.S. Department of Energy

Office of Biological and Environmental Research