Sildenafil citrate,100 µg base/mL,MeOH,1mL

Antimony (Sb), 1000µg/ml in 2%-HNO3/Water, 100ml

4-Ethyl-6-methyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 132034-90-3

1,2-Bis(2,4,6-tribromophenoxy)ethane, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 37853-59-1