EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93325 PAH Mix #2 Price on request 8423.10-100-AN Pyrazon, 100µg/mL, Solvent-acetonitrile, Unit 1.1mL, # of units-1, Cas.no. 1698-60-8 Price on request 11303.12-K-ME Primidone,1000 µg/mL,MeOH,1mL, Price on request