Potassium (K)

p-Tolualdehyde-DNPH, 100µg/ml in Acetonitrile, 1ml

Benzo[ghi]perylene-d12, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-10, Cas.no. 93951-66-7

Theophylline, 100µg/ml in MeOH, 5ml