PAH/PCB Internal Standard Mix 2 0711,10 Naphthalene 0816,14 Phenanthrene 0239,20 Benzo[a]pyrene 2001,12 2,2’,4,5,5’-Pentachlorobiphenyl PCB 101 2005,12 2,2’,3,4,4’,5,5’-Heptachlorobiphenyl PCB 180 Conc: 0.01mg/ml in methanol