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Technical Note: Concerns regarding 24-h sampling for formaldehyde, acetaldehyde, and acrolein using 2,4-dinitrophenylhydrazine (DNPH)-coated solid sorbents
Citation:
HERRINGTON, J. S. AND M. D. HAYS. Technical Note: Concerns regarding 24-h sampling for formaldehyde, acetaldehyde, and acrolein using 2,4-dinitrophenylhydrazine (DNPH)-coated solid sorbents. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 55:179-184, (2012).
Impact/Purpose:
Journal Article
Description:
A wide variety of natural and anthropogenic sources emit airborne carbonyls such as aldehydes (RCHO) and ketones (R1COR2). Vegetation, food, forest fires, fossil fuel combustion, disinfectants, fumigants, preservatives, and resins are a few examples of primary carbonyl sources. The photo-oxidation of natural and anthropogenic hydrocarbons (see Scheme 1) also produces secondary carbonyls. For example, hydroxyl radical (OH) oxidation of 1,3-butadiene yields acrolein, and continued oxidation yields glyoxal, glycol-aldehyde, and malonaldehyde. Carbonyls contribute to initiating and sustaining the photochemical radical pool that produces tropospheric smog. For example, formaldehyde oxidation by OH forms the HCO radical, which reacts rapidly with atmospheric O2 to form CO and HO2 radicals. Carbonyls are precursors to carboxylic acids and oxidants including ozone, peroxycarboxylic nitric anhydrides (PANs), and peroxycarboxylic acids. The ubiquitous presence of these compounds in the atmosphere, indoor air, and personal air is due to the vast abundance of carbonyl sources.
