EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70383 Parathion ethyl, 1000µg/ml in MeOH, 1ml Price on request 59442 Anion Mix EPA Method 300.0 Price on request 94194 PAH Standard Price on request