N-methylperfluoro-1-butanesulfonamide, 50µg/ml in MeOH, 1,2ml

n-Heptyltin trichloride, 10.0 µg/ml, t-Butylmethy

Cimetidine guanidine derivative (N-Methyl-N'-[2-[[(5-methyl-H-imidazol-4-yl)-methyl]-thiol]-ethyl]-guanidine dihydrochloride), neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 59660-24-1

EPA Method 525 - Fortification Solution