EPA Method 552,552.1,552.2 Internal Std Back Catalog number: 30105 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678466 Paraoxon-ethyl, 10 µg/ml, Acetonitrile, 10ml Price on request 677679 Benzo[a]pyrene, 10.0 µg/ml, Acetonitrile, 10ml Price on request 678431 Hexaconazole, 100 µg/ml, Acetonitrile, 5ml Price on request