D6-Parathion-methyl, 100 µg/ml, Acetone, 1ml

EPA Method 502.2 Internal Standard

3,4,4',5-Tetrachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

1,6-Dimethylphenanthrene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 20291-74-1