beta-HCH, 100 µg/ml, Acetonitrile, 5ml

n-Tridecane, ?13C: -33.47, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no. 629-50-5

Sulfamethazine,neat,neat,250mg,

Metformin hydrochloride, neat, Solvent-neat, Unit 5g, # of units-1, Cas.no. 1115-70-4