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Ann. occup. Hyg., Vol. 47, No. 5, pp. 389-398, 2003
© 2003 British Occupational Hygiene Society
Published by Oxford University Press

Analysis of Particle and Vapour Phase PAHs from the Personal Air Samples of Bus Garage Workers Exposed to Diesel Exhaust

LEEA KUUSIMÄKI*, KIMMO PELTONEN, PERTTI MUTANEN and KIRSTI SAVELA

Finnish Institute of Occupational Health, Topeliuksenkatu 41 aA, FIN-00250 Helsinki, Finland

Received 9 September 2002; in final form 3 February 2003

The levels of particle and vapour phase polycyclic aromatic hydrocarbons (PAHs) derived from the diesel exhaust compounds in bus garage work were measured in winter and in summer. Five personal air samples were collected from the breathing zones of 22 garage workers every other day of consecutive weeks. Control samples (n = 22) were collected from office workers in Helsinki. Fifteen PAHs in the air samples were analysed by HPLC using a fluorescence detector. Statistically significant differences were observed between total PAH levels of the exposed workers (2241 and 1245 ng/m3) and the control group (254 and 275 ng/m3) in both winter (P < 0.001) and summer (P < 0.001). Phenanthrene, pyrene, benzo[ghi]perylene and fluoranthene were the major compounds in the particle phase, and naphthalene, phenanthrene and fluorene in the vapour phase. About 98% of PAHs measured were related to the vapour phase compounds, whereas the high molecular weight PAH compounds were detected only in the particle phase. The PAH levels in the garages were twice as high (P < 0.001) in winter as in summer. Even though the exposure levels were low in the bus garages, the low level does not allow conclusions to be drawn about the possible adverse health effects due to exposure to diesel exhaust.

Keywords: air sampling; diesel exhaust; occupational exposure; polycyclic aromatic hydrocarbons


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