EPA Method 8260B Internal Standard Back Catalog number: 22213 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 81520 Dinoseb Price on request 675150 Beflubutamid, 100 µg/ml, Acetonitrile, 5ml Price on request 72443 N-Nitroso-N-ethylurea Price on request