EPA Method 551.1 Performance Check Soln Back Catalog number: 30104 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680988 Ofurace, 100 µg/ml, Acetonitrile, 1ml Price on request ACQ-WH11-015 Ethanol standard in whole blood,1.1g/L,whole blood, 1.5mL Price on request 678218 Isoproturon-desmethyl, 100 µg/ml, Acetonitrile, 1ml Price on request