Paraoxon-ethyl, 10.0 µg/ml, Acetone, 10ml

Tricyclohexyltin chloride, 500µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 3091-32-5

PCB 118, 10 µg/ml, Isooctane, 10ml

EPA Method 507 - Internal Standard