EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1626.8-100-ME Ethyl-ß-D-6-glucuronide, 100µg base/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 17685-04-0 Price on request 673296 Fluazifop-methyl, 10.0 µg/ml, Acetonitrile, 10ml Price on request 31882 EPA Method 507 Nitrogen Phosphorus Pesticide Price on request