EPA Method 525 - Internal Standard

n-Tricosane-d48, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 203784-75-2

Aroclor 1221

Perfluoro-n-[1,2,3,4,5,6,7-13C7]undecanoic acid, 50µg/ml in MeOH, 1,2ml