Benzo(a)pyrene in gasoline partially persists in automobile exhaust.
On average 36 percent of the benzo[a]pyrene in an automobile's exhaust gas comes from the benzo[a]pyrene originally in the gasoline. Between 0.1 and 0.2 percent of the benzo[a]pyrene in the gasoline survives the combustion process and is recovered from the exhaust; 5 percent accumulates in the crankcase oil. Some of the benzo[a]pyrene in the gasoline is converted into other polynuclear aromatic hydrocarbons and other more polar compounds. For our experiments we used commercial gasoline containing benzo[a]pyrene at 1.0 part per million to which was added benzo[a]pyrene-8,9-(14)C at 1.1 parts per million as a radioactive tracer.
D001580:Benzopyrenes / Q000032:analysis*; D002247:Carbon Isotopes; D010578:Petroleum / Q000032:analysis*; D010616:Phenanthrenes / Q000032:analysis; D001335:Vehicle Emissions
D001580:Benzopyrenes; D002247:Carbon Isotopes; D010578:Petroleum; D010616:Phenanthrenes; D001335:Vehicle Emissions