2,3',6-Trichlorobiphenyl ,100 µg/mL,isooctane,1mL,

Malathion, 100μg/mL in Acetonitrile, 1ml

Metoprolol tartrate, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 56392-17-7

d4 C27 alpha alpha alpha (20R)-Cholestane