Measurement of C{sub 24}H{sub 14} polycyclic aromatic hydrocarbons associated with a size-segregated urban aerosol
- Massachusetts Inst. of Tech., Cambridge, MA (United States)
- Tufts Univ., Medford, MA (United States)
Six-ring C{sub 24}H{sub 14} (MW 302) polycyclic aromatic hydrocarbons (PAH), some of which are potent mutagens, are present in urban aerosols. Size-segregated atmospheric aerosol samples from Boston, MA, were analyzed for C{sub 24}H{sub 14} PAH by gas chromatography/mass spectrometry. Eleven peaks were found with mass to charge ratios of 302; of these, eight were identified using authentic standards. Five of the peaks were quantified. For each of these five, the distributions with respect to particle size were bimodal with the majority of the mass associated with accumulation mode particles and a smaller fraction of the mass associated with ultrafine mode particles. These distributions are similar to those observed for PAH of molecular weight 252--278 in the same sample but different from those of benzo[ghi]perylene and coronene which were associated to a greater degree with ultrafine particles. The data suggest that C{sub 24}H{sub 14} PAH repartition to larger particles by vaporization and sorption more rapidly than do benzo[ghi]perylene and coronene. The total concentration of C{sub 24}H{sub 14} PAH was comparable to that of benzo[a]pyrene in the same sample. Because of their mutagenicities, C{sub 24}H{sub 14} PAH may make a contribution to the genotoxicity of urban aerosols comparable to that of benzo[a]pyrene.
- OSTI ID:
- 642236
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 13 Vol. 32; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determination and genotoxicity of high molecular mass polycyclic aromatic hydrocarbons isolated from coal-tar-contaminated sediment
Review of sampling and analysis methodology for polynuclear aromatic compounds in air from mobile sources. Final report, 1 March-30 November 1983