EPA Method 8141/1657 Surrogate Standard Back Catalog number: 92357 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676424 Demeclocycline hydrochloride, 100mg Price on request 73519 Atrazine desethyl-2-hydroxy Price on request P286243 Perfluoro-2,5-dimethyl-3,6-dioxanonanoic Acid, 100 Price on request