EPA Method 8040 - Surrogate Standard Back Catalog number: 80403 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678150 Terbufos-sulfone, 100 µg/ml, Acetonitrile, 1ml Price on request 2821.7-10MG n-Perfluoroheptanoic acid Price on request 676417 Fluazifop-butyl, 250mg Price on request