Custom PAH mix, C15-C22 0813.15 3-Methylphenanthrene 0815.15 9-Methylphenanthrene 0811.15 1-Mehtylphenantrene 0460.15 2-Methylanthracene 0794.18 Retene 0261.18 Benzo[ghi]fluorantene 0035.18 Cyclopenta[cd]pyrene 0001.18 Triphenylene 0262.20 Benzo[a]f