EPA Method 8121 Surrogate Standard Back Catalog number: 81204 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674011 Monuron, 10.0 µg/ml, Acetonitrile, 10ml Price on request 94090 Oxygenates Price on request 675757 Disulfoton-sulfoxide, 100 µg/ml, Acetonitrile, 5 Price on request