Metoprolol (free base), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 51384-51-1

DL-Methionine, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 59-51-8

BTEX (10 µg/mL)

Cimetidine sulphoxide dihydrochloride, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 54237-72-8