Measurement and speciation of gas phase peroxides in the atmosphere

Journal Article · Sat Feb 20 04:00:00 EST 1993 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/92JD02514· OSTI ID:6711545

Lee, J H; Leahy, D F; Tang, I N; Newman, L ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

An improved gas phase sampler and a recently developed nonenzymatic measurement method for H[sub 2]O[sub 2] and HOCH[sub 2]OOH(HMHP) are described. The gas phase sampler is equipped with a surfaceless intake to alleviate heterogeneous loss of H[sub 2]O[sub 2] in the sampling line. The nonenzymatic method makes use of the aqueous phase Fention reaction for H[sub 2]O[sub 2] measurement and is capable of speciation between H[sub 2]O[sub 2] and HMHP, using a dual channel technique. By adding a third channel employing the well-established method of p-hydroxyphenylacetic acid (POHPAA) and horseradish peroxidase for total peroxide measurement, it is possible to differentiate H[sub 2]O[sub 2], HMHP, and other organic peroxides, if present. The measurement technique was successfully deployed in a field study at George L. Smith III State Park, Georgia (82[degrees]20[prime]W, 32[degrees]30[prime]N). Preliminary data analysis indicates that the measured total peroxides range from 0.4 to [approximately]6 ppbv, depending on meteorological conditions, and that organic peroxides, mostly HMHP, constitute between 20 and 80% of the total peroxides. The work reported here represents the first continuous and real-time measurements for these peroxides in the atmosphere. 28 refs., 7 figs., 1 tab.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6711545
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 98:D2; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR SAMPLERS
ATMOSPHERIC CHEMISTRY
CHEMISTRY
DATA ANALYSIS
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
EQUIPMENT
FLUIDS
GASES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INTAKE
MEASURING INSTRUMENTS
MEASURING METHODS
OXYGEN COMPOUNDS
PEROXIDES
RANGE
SAMPLERS
SAMPLING