EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended D450653-50MG Dihydroergotamine (+)-Tartrate Salt (2:1), 50mg Price on request EDF-8999-4 Method 1613Labelled Compound Stock Solution, in Nonane, 4 x 0,5ml Price on request 51112 Benzene and Toluene Calibration Blends Mix#7 Price on request