EPA Method 531.1 Individual Analytes Back Catalog number: 30041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677335 Heptadecafluorooctanesulfonic acid potassium salt, Price on request 673755 Camphechlor (Toxaphene), 100 µg/ml, Ethyl acetate Price on request 679828 D9-Trimethoprim, 10mg Price on request