EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57064 Gadolinium (Gd) Price on request 678419 Flutriafol, 10.0 µg/ml, Acetonitrile, 10ml Price on request 56063 Europium (Eu) Price on request