Record Display for the EPA National Library Catalog

RECORD NUMBER: 267 OF 5691

OLS Field Name OLS Field Data
Main Title Ambient Air Measurements of Hydrogen Peroxide in the California South Coast Air Basin.
Author Gay, Bruce W. ; Darnall, Karen R. ; Winer, Arthur M. ; Pitts, Jr., James N. ; Kok, Gregory L. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC. ;California Univ., Riverside. Statewide Air Pollution Research Center. ;Harvey Mudd Coll., Claremont, CA. Dept. of Chemistry.
Year Published 1978
Report Number EPA/600/J-78/123;
Stock Number PB-298 544
Additional Subjects Hydrogen peroxide ; Gas analysis ; Chemical analysis ; Concentration(Composition) ; Colorimetric analysis ; Ozone ; Chemiluminescence ; Smog ; California ; Air pollution detection ; Reprints
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-298 544 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 6p
Abstract
Hydrogen peroxide (H2O2) concentrations have been measured at two locations (Claremont and Riverside) in the California South Coast Air Basin during the months of July and August 1977. Three different analytical methods were employed: a chemiluminescent method and two colorimetric procedures. Typical mid-afternoon concentrations of H2O2 during moderate smog episodes (i.e., O3 150-200 ppb) ranged from approximately 10 to 30 ppb. These values are significantly lower than those measured in a study in Riverside in 1970. In general, maximum H2O2 concentrations were observed at about the time of the ozone maximum, but in the course of a day H2O2 levels did not occur in a fixed ratio to O3 concentrations, and in a number of cases the concentrations of H2O2 declined more slowly than those of ozone following the maximum. During this investigation signals corresponding to elevated levels of H2O2 (i.e., approximately 100 ppb) were observed by all three methods when grass or forest fire plumes impacted on the measurement site.