EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9361.3-KIT-N Butyl-/isobutyl phthalate Kit, neat (1226.16+8537.16+2102.16, 100mg each), , Solvent-, Unit Kit, # of units-1, Cas.no. Price on request 673315 Haloxyfop, 100 µg/ml, Acetonitrile, 5ml Price on request 677431 Tributyl phosphate, 1ml Price on request