Custom alkyl-PAHs and alkyl-benzenes Mixture 20µg/mL each in dichloromethane 2155.9 Isopropylbenzene 1298.9 n-Propylbenzene 0722.12 1,3-Dimethylnaphthalene 0724.12 1,5-Dimethylnaphthalene 0725.12 1,6-Dimethylnaphthalene 0731.12 2,7-Dimethylnaphthale