EPA Method 528 Internal Standard

Perfluoro-n-tridecanoic acid, 1.2ml x 50ug/ml, methanol

3,6-Dimethylphenanthrene

3-Methyl-2,2',4,6'-tetrachlorodiphenylmethane, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no.