Progress in Development of Rapid Methods of Analysis for Trace Quantities of Polynuclear Aromatic Hydrocarbons in Automobile Exhaust

摘要

Substantial progress was made in the development of a rapid method to measure benz(a)anthracene (BaA) and benzo(a)pyrene (BaP) as well as additional polynuclear aromatic hydrocarbons in auto exhaust tar and gasoline. For gasoline samples, repeatability for BaA and BaP was 5-12 relative percent. In terms of absolute accuracy, BaP results agreed well with measurements by a more classical method, but BaA values by the GC/UV method were systematically lower. A preliminary study indicated that measurement of BaA by the GC/UV method is more nearly correct. Four auto exhaust tar samples were also analyzed. BaA values by the GC/UV method were systematically lower than those from the classical method, as was true for gasoline. Measurements of BaP by the two different methods were in agreement for two samples and markedly different for the other two. (Author)