Oliveira, MartaSlezakova, KlaraGomes, Maria JoséAzevedo, AnaTeixeira, João Paulo FernandesDelerue-Matos, CristinaPereira, Maria do CarmoMorais, Simone2016-12-142016-12-142016Oliveira, M.; Slezakova, K.; Gomes, Maria José; Azevedo, Ana; Teixeira, J.P.; Delerue-Matos, C.; Pereira, M.C.; Morais, S. (2016). Urinary levels of monohydroxyl PAH metabolites in Portuguese firefighters: background levels and impact of tobacco smoke. In XXII Encontro Luso-Galego de Química. Bragançahttp://hdl.handle.net/10198/13606Firefighting occupational exposure is classified as possible carcinogen to humans by the International Agency for Research on Cancer and the US National Institute for Occupational Safety and Health [1,2].  Tobacco smoke is a very important factor in the assessment of occupational exposure of workers, since the prolonged exposure to tobacco smoke is by itself the major cause of lung cancer [3]. The consumption of tobacco is responsible for the exposure to many smoke components including more than sixty known carcinogens, including some polycyclic aromatic hydrocarbons (PAHs) [4].  PAHs are ubiquitous compounds formed during pyrolysis or incomplete combustion of organic matter, being well-known for their toxic, mutagenic, and carcinogenic properties to humans [5,6]. So far, the impact of tobacco smoke on firefighters’ total exposure to PAHs is very limited.engMonohydroxyl PAHUrinary levelsFirefightersTobacco smokeconference poster