HR: 1340h
AN: A53C-0910    [Abstracts]
TI: Measurements of NO$_{2}$ in Ambient Air Using a Solid-State Photolytic Converter
AU: * Buhr, M
EM: marty@sonomatech.com
AF: Sonoma Technology, Inc., 1360 Redwood Way Suite C, Petaluma, CA 94954 United States
AU: Blumenthal, D
EM: don@sonomatech.com
AF: Sonoma Technology, Inc., 1360 Redwood Way Suite C, Petaluma, CA 94954 United States
AU: Kok, G
EM: glkok@dropletmeasurement.com
AF: Droplet Measurement Technologies, Inc., 5710 Flatiron Parkway Suite B, Boulder, CO 80301 United States
AU: Dawson, B
EM: bdawson@dropletmeasurement.com
AF: Droplet Measurement Technologies, Inc., 5710 Flatiron Parkway Suite B, Boulder, CO 80301 United States
AB: Measurement of trace levels of nitrogen dioxide (NO$_{2}$) remains an important issue for increasing our understanding of tropospheric ozone production and the distribution of precursor species. A fast-response, highly specific photolytic converter for NO$_{2}$ using a light-emitting diode (LED) light source has been developed and characterized in both laboratory experiments and measurements in ambient air. An overview of the technology will be presented, highlighting the important features of the photolytic converter and its use with chemiluminescence detectors (nitric oxide [NO] + ozone [O$_{3}$]). Performance tests conducted both in the laboratory and the field will be presented. Results from ambient measurements of NO$_{2}$ in conjunction with other reactive nitrogen species and ozone from an aircraft platform will be presented to demonstrate the converter performance and to explore the chemical relationships observed.
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting