EPA Method 525 Surrogate Standard Back Catalog number: 93971 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679317 Carbophenothion-methyl, 100 µg/ml, Methanol, 1ml Price on request 66128 2,2’,3,3’,4,4’-Hexachlorobiphenyl (128) Price on request 680505 D3-Ofloxacin, 100 µg/ml, Acetonitrile, 1ml Price on request