EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50283 Anions Mix - ICA-DX-721 Price on request 95987 Chlorinated Pesticide Mix Price on request 9265.17-100-AN U{13C17}-Mycophenolic acid, 100µg/mL, Solvent-acetonitrile, Unit 1.2mL, # of units-1, Cas.no. Price on request