Phase and size distributions of polycyclic aromatic hydrocarbons in environmental tobacco smoke
- Lawrence Berkeley Lab., CA (United States)
- Aerosol Dynamics, Inc., Berkeley, CA (United States)
Phase and size distributions of polycyclic aromatic hydrocarbons (PAH) influence lung dosimetry for environmental tobacco smoke (ETS). Gas-phase components of ETS, especially water-soluble species, deposit more efficiently than particles, but they deposit in the upper airways of the human respiratory system where they can be cleared quickly. Typical ETS particles of 0.1 to 0.5 {mu}m diameter are not deposited as efficiently as gases, but they penetrate deeply into the lung and are cleared more slowly than water-soluble gas-phase components. Although the dosimetry of organic compounds in the particulate phase depends on their particle-size distribution, very little data is available for specific chemical classes such as PAH in ETS. Even less is known about the dynamic behavior of the size distribution of PAH in ETS as the smoke is diluted and aged in indoor environments. Previous studies suggest that evaporation of compounds with high volatility will dry out sidestream cigarette smoke as it is diluted into a room, and this effect will decrease the PAH concentration in smaller particles more than the bigger particles. Larger particles may also accumulate PAH by condensation of species with higher boiling points. Two new tools have been developed recently to measure the phase and size distributions of PAH, and they have been used here to investigate the dynamic behavior of simulated ETS at two temperatures (18.3 and 25.1 {degrees}C). Phase distributions of PAH have been measured in simulated ETS (diluted sidestream smoke) using the new annular denuder-based Integrated Organic Vapor-Particle sampler (IOVPS). Simultaneously, the size distributions of particulate PAH have been determined with a new microslot impactor, the Size-Segregated Environmental Tobacco Smoke Sampler (SSETS) that has cutpoints at 0.10, 0.38, 0.48, 1.7 and 3.5 {mu}m. The IOVPS and SSETS operated in an environmental chamber (20 m{sup 3}) to sample PAH over two 45-min intervals.
- OSTI ID:
- 166573
- Report Number(s):
- CONF-9510126-; TRN: 95:008181-0064
- Resource Relation:
- Conference: Annual meeting of the American Association for Aerosol Research, Pittsburgh, PA (United States), 9-13 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of American Association for Aerosol Research (AAAR) `95; PB: 464 p.
- Country of Publication:
- United States
- Language:
- English
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