EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 15900-3795C-100M1 Pentachlorphenol-13C6, 100µg/ml in MeOH, 1ml Price on request 94213 Herbicide Acid Standard Price on request I720501 3-Iodothyronamine (4-Hydroxyphenyl-13C6) HCl, 1mg Price on request