EPA Method 8260B - Purgeable Internal Std

Metformin, 1000μg/ml in MeOH, 1ml

n-Eicosane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 112-95-8

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