EPA Method 502/524 High Conc VOC Mix #3

Clofibric acid, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 882-09-7

Ba, 1000 µg/mL in 2% HNO3, 100ml

Perfluoro-n-[1,2,3,4-13C4]butanoic acid, 50µg/ml in MeOH, 1,2ml