for qualitative measurements(Polycyclic aromatics)Acenaphthylene (1% w/v in Toluene) . 2 mL Acenaphthene (1% w/v in Toluene) 2 mLAnthracene (1% w/v in Toluene). 2 mLAzulene (1% w/v in Toluene) 2 mL1,2-Benzanthracene (1% w/v in Toluene). 2 mL2,3-Benzoflu