EPA Method 551.1 Surrogate Standard Back Catalog number: 30102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675456 Fenamiphos-sulfoxide, 10 µg/ml, tert-Butyl methyl Price on request 680638 Triflusulfuron Metabolite IN-M7222, 10mg Price on request 94987 Organonitrogen Pesticides Price on request