Iopamidol, 100µg/ml in MeOH, 1ml

Copper (Cu), 1000µg/ml in 2%-HNO3/Water, 100ml

2,4'-DDT, 100 µg/ml, Acetonitrile, 5ml

alpha alpha alpha (20R)-Cholestane, 1000µg/mL in Isooctane, 1ml