EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C16173500 Phthalic acid, bis-iso-butyl ester, certified, 0.25g Price on request 82432 2-Butanone Price on request 14500-0115-100AN5 Benzo(a)fluoranthene, 100µg/ml in Acetonitrile, 5m Price on request