EPA Method 551.1 Performance Check Soln

2,2',3,4,5'-Pentachlorobiphenyl (87)

Tralomethrin, 100 µg/ml, Isooctane, 1ml

O,O-Diethyl dithiophosphate-13C4, ammonium salt,100 µg acid/mL,MeOH,1mL,