Record Display for the EPA National Library Catalog

RECORD NUMBER: 18 OF 25

OLS Field Name OLS Field Data
Main Title Rapid Measurement of Aqueous Hydroxyl Radical Concentrations in Steady-State HO Flux Systems.
Author Ireland, J. ; Valinieks, J. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Riga Technical Univ. (Latvia). Faculty of Chemical Technology.
Publisher c1992
Year Published 1992
Report Number EPA/600/J-92/402;
Stock Number PB93-131779
Additional Subjects Hydroxyl radicals ; Chemical analysis ; Water pollution detection ; Oxidation ; Steady state ; Aqueous solutions ; Water treatment ; Gas chromatography ; Mass spectroscopy ; Nitrogen organic compounds ; Water pollution sampling ; Oxidation ; Electrophoresis ; Reprints ; Nitrone/(pyridyl-oxide)-N-butyl
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-131779 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/12/1993
Collation 16p
Abstract
In recent years the hydroxyl radical (HO.) has become the focus of a significant body of research concerning the chemical oxidation of anthropogenic organic compounds in the environment. The spin-trap compound alpha-(4-pyridyl-1-oxide)-N-tert-butyl-nitrone (4-POBN) is utilized for the detection and quantitation of the hydroxyl radical (HO) in aqueous solution. Capillary electrophoresis enables rapid analysis of the probe compound. The thermally unstable HO radical adduct of 4-POBN can be unequivocally identified by gas chromatography / mass spectrometry analysis of it's pentafluorobenzyl ether. The minimum steady-state flux of HO. is determined in several advanced oxidation systems including photo-Fenton, ozone, and titanium dioxide based radical generators.