||Sampling and Determination of Gas-Phase Hydrogen Peroxide Following Removal of Ozone by Gas-Phase Reaction with Nitric Oxide.
Tanner, R. L. ;
Markovits, G. Y. ;
Ferreri, E. M. ;
Kelly, T. J. ;
||Brookhaven National Lab., Upton, NY. Environmental Chemistry Div.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Hydrogen peroxide ;
Vapor phases ;
Atmospheric composition ;
Liquid phases ;
Enzyme catalyzed flourescence techniques ;
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A method for determination of hydrogen peroxide in the ambient atmosphere is described, using impinger or diffusion scrubber collection of hydrogen peroxide with aqueous-phase analysis by an enzyme-catalyzed fluorescence technique. Interference from ozone at ambient levels is removed by gas-phase titration with excess nitric oxide. The impinger and diffusion scrubber collection techniques are shown to give equivalent results for atmospheric gas-phase hydrogen peroxide with limits of detection of 0.1 ppbv for approximately 60-min and 10-min sampling times, respectively. (Copyright (c) American Chemical Society 1986.)