EPA Method 507 Nitrogen Phosphorus Pesticide Back Catalog number: 31882 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4157-1ML Performance Control Mixture 4 Analytes each Wt.% as listed; units: 1x1mL, 5x1mL neat Name Wt. % Name Wt. % n-Hexadecane 75.0 Tetralin 3.0 Naphthalene 2.0 Price on request 678978 Diethyl phthalate, 500mg Price on request 676092 Gestodene, 10mg Price on request