EPA Method 552.1 - Surrogate Standard

O,O,O-Triphenyl phosphorothionate,1000 µg/mL ,MeOH,1mL,

Benzothiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 95-15-8

Pyroxsulam, 100 µg/ml, Acetonitrile, 1ml