Record Display for the EPA National Library Catalog


Main Title NO2 actinometer for field use /
Author Burch, Darrell E. ; Bean, Ross C. ; Gates., Francis J.
Other Authors
Author Title of a Work
Burch, D. E.
Bean, R. C.
Gates, F. J.
CORP Author Philco-Ford Corp., Newport Beach, Calif. Aeronutronic Div.;National Environmental Research Center, Research Triangle Park, N.C.
Publisher Chemistry and Physics Laboratory, National Environmental Research Center,
Year Published 1974
Report Number EPA-650/4-74-036; U-3416; EPA-68-02-0798; EPA-ROAP-56AAI
Stock Number PB237745
OCLC Number 52565071
Subjects Nitrogen dioxide.
Additional Subjects Actinometers ; Nitrogen dioxide ; Photolysis ; Laboratory equipment ; Air pollution ; Absorption spectra ; Design ; Smog
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 650-4-74-036 Headquarters Library/Washington,DC 05/20/2013
EJBD  EPA 650-4-74-036 Headquarters Library/Washington,DC 06/09/2015
EKBD  EPA-650/4-74-036 Research Triangle Park Library/RTP, NC 08/29/2017
NTIS  PB-237 745 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 55 unnumbered pages : illustrations, charts ; 28 cm.
Solar radiant energy in the ultraviolet and short-wavelength visible dissociate NO2 in the atmosphere to produce NO and O2. This photolytic reaction plays an important role in the formation of photochemical smog, and information about the amount of actinic energy available in the lower atmosphere is required for the development of mathematical models of the atmospheric processes. This report describes the development and testing of an actinometer designed to measure the actinic energy available for the photolytic dissociation of NO2. A spherical test bulb contains a mixture of NO2 and O2 when it has been in the dark for several minutes. When the bulb is exposed to solar energy NO is formed; its concentration is monitored by gas-cell correlation methods involving the infrared adsorption by NO. A shutter periodically shades the test bulb from the sun for a one-minute period each two minutes. During the shaded period, part of the NO recombines with O2 to form NO2. The cyclic change in the NO concentration is related to the actinic irradiance.
Project Officer: P.L. Hanst. "Prepared for Office of Research and Development, U.S. Environmental Protection Agency." "August 1974." "Contract No. 68-02-0798 ; ROAP No. 56AAI; Program Element No. 1A1003." "EPA-650/4-74-036." PB 237 745--NTIS. Includes bibliographical references.