EPA Method 548.1 Internal Standard

2,2',3,3',4,4'-Hexabromodiphenyl ether, 1.2ml x 50ug/ml, nonane

N-Nitrosopyrrolidine, 2000µg/mL, Solvent-dichloromethane, Unit 1mL, # of units-1, Cas.no. 930-55-2

Perfluoro-n-[13C9]nonanoic acid, 50µg/ml in MeOH, 1,2ml