The aerosol sample was extracted by ultrasonic technique and 16 of the PAH's were determined, in priority, as proposed by EPA, by GC-MS with selected-ion monitoring (SIM).

The relation of 1-hydroxypyrene in urine with ambient PAHs was investigated with several groups of volunteers carrying personal air samplers and stationary samplers.

The qualitative analysis of N polyaromatics in heavy oil was made by a double adsorption separation followed by the application of low voltage ionization and high resolution MS direct sampling.