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RAPID MEASUREMENT OF AQUEOUS HYDROXYL RADICAL CONCENTRATIONS IN STEADY-STATE HO· FLUX SYSTEMS
Citation:
Ireland*, J C. AND J. Valinieks*. RAPID MEASUREMENT OF AQUEOUS HYDROXYL RADICAL CONCENTRATIONS IN STEADY-STATE HO· FLUX SYSTEMS. doi:10.1016/0045-653, H. Fiedler, L.L. Needham (ed.), CHEMOSPHERE. Elsevier BV, AMSTERDAM, Netherlands, 25(3):383-396, (1992).
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Description:
The spin-trap compound a-(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.
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RAPID MEASUREMENT OF AQUEOUS HYDROXYL RADICAL CON- CENTRATIONS IN STEADY-STATE HO FLUX SYSTEMS