EPA Method 502/524 Fortification Solution

Perfluoro-4,5-dimethylhexane sulfonate, 200ul x 1.00ug/ml, methanol

n-Pentadecylbenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2131-18-2

3-Perfluoropentyl propanoic acid (5:3), 50µg/ml in MeOH, 1,2ml