Record Display for the EPA National Library Catalog
RECORD NUMBER: 20 OF 40
|OLS Field Name||OLS Field Data|
|Main Title||Determination of OH Rate Constants for Six Volatile Organics in Air Using the UCR (University of California-Riverside) Protocol.|
|Author||Arnts, R. R. ; Seila, R. L. ; Bufalini, J. J. ;|
|CORP Author||Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.|
|Additional Subjects||Air pollution ; Organic compounds ; Acetylene ; Carbon disulfide ; Nitrobenzenes ; Chemical reactions ; Oxidation ; Tables(Data) ; Volatile organic compounds ; Ethylene dichloride ; Ethylene dibromide ; p-dichlorobenzene ; Hydroxyl|
An important mechanism of chemical transformation of organic pollutants in the atmosphere is through oxidation by OH radicals. A relatively simple laboratory procedure for determining the OH rate constants in air was developed. To determine the rate, a teflon bag is filled with 10-15 ppm of methyl nitrite, 5 ppm of nitric oxide, 2 ppm of test compound, and 2 ppm of an organic which has an accurately known OH rate constant. The mixture is irradiated with blacklamps and the concentrations of the reference and test organic are measured over a 45-minute period. Results are detailed in the report.