Benzo[a]pyrene,400µg/mL,cyclohexane,0.5mL,

6-Amino-5-bromoquinoxaline, 25g

1,2,4,7,9-Pentachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-octane sulfonate (6:2), 50µg/ml in MeOH, 1,2ml