EPA Method 8141/1657 Surrogate Standard Back Catalog number: 92357 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681308 Afidopyropen, 100 µg/ml, Acetonitrile, 1ml Price on request 3390.9-100-AN Endosulfan alcohol Price on request 674057 Phenkapton, 10.0 µg/ml, Acetonitrile, 10ml Price on request