Internal Standard Solution, 1.2ml, nonane

17ß(H),21ß(H)-25,28,30-Trisnorhopane (in mixture with 2632.27 (ß alpha-)), neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. 92692-42-7

4-Methyl-1-naphthol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 10240-08-1

Benzo[a]pyrene, 10.0 µg/ml, Acetonitrile, 10ml