Penicillin G potassium, 100µg/mL in Acetonitrile, 1ml

Cesium (Cs)

Isocaffeine (1,3,9-Trimethylxanthine), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 519-32-4

Perfluorohexanesulfonic acid; PFHxS, 95%, 250mg