Routine Biomarker Internal Standard Cocktail 6 0389,14 Phenanthrene-d10 0978,10 Naphthalene-d8 1024,18 Chrysene-d12 1086,12 Biphenyl-d10 1088,20 Benzo[a]pyrene-d10 Concentration: 0.1mg each/mL in toluene Units: 1mL ampuller