EPA Method 551.1 Performance Check Soln

2,3,3',4,4',5'-Hexachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 69782-90-7

Cholecalciferol

Terbuthylazine, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 5915-41-3