Prothiofos, 100 µg/ml, Acetonitrile, 1ml

Sulfamethazine-13C6, 1mg

Propoxyphene-d5 hydrochloride, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no.

2,2',3,3'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL,