EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4493-SET EN 12916 Calibration Standards 4 Analytes, each concentration as listed in n-heptane; units: 4x1.5mL Certan® bottle, Calibration 1,2-Dimethylbenzene Fluorene Phenanthrene Standard g/100mL g/100mL Price on request 51011 JP-TS Price on request 675046 Butachlor ESA sodium salt, 10mg Price on request