Clofibric acid, 100 µg/ml, Acetonitrile, 1ml

4,9-Dimethylphenanthrene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 66291-34-7

Potassium (K), 1000µg/ml in 2%-HNO3/Water, 100ml

n-Hexane, 1000µg/ml in MeOH, 1ml