Detection of hydroxylated nitro aromatic and hydroxylated nitro polycyclic aromatic compounds in an ambient air particulate extract using bioassay-directed fractionation

Mass spectral evidence is reported for the detection of hydroxylated nitro polycyclic aromatic hydrocarbons (HN-PAH) and hydroxylated nitro polycyclic aromatic ketones in polar fractions of an ambient air particulate extract. The isomer substitution observed for these compounds supports the mechanis...

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Bibliographic Details
Published in:Environmental science & technology 1988-08, Vol.22 (8), p.908-915
Main Authors: Nishioka, Marcia G, Howard, Corinne C, Contos, Denise A, Ball, Louise M, Lewtas, Joellen
Format: Article
Language:English
Subjects:
Analysis methods
Applied sciences
Atmospheric pollution
Exact sciences and technology
Pollution
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Summary:Mass spectral evidence is reported for the detection of hydroxylated nitro polycyclic aromatic hydrocarbons (HN-PAH) and hydroxylated nitro polycyclic aromatic ketones in polar fractions of an ambient air particulate extract. The isomer substitution observed for these compounds supports the mechanism proposed from smog chamber studies: the hydroxyl radical attack on the aromatic compound followed by nitration ortho or para to the hydroxyl substituent. Bioassay-directed fraction through three sequential separations led to detection of HN-PAH compounds in a mutagenic and substantially simplified subfraction of the extract.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00173a007