EPA Method 551.1 Performance Check Soln

2,3',4,4',5',6-Hexachlorobiphenyl ,100 µg/mL,isooctane,1mL,

2,3',4,4',5-Pentachlorobiphenyl, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 31508-00-6

1,2,3-Trimethylbenzene, 250mg