EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 684354 13C3-Atrazine-desethyl-desisopropyl, 100 µg/ml, M Price on request 59408 Anions Standard Price on request 681248 Metazachlor Metabolite 479M11, 10mg Price on request