MA - EPH Fractionation Surrogate Spike Back Catalog number: 51039 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678109 Isoxadifen-ethyl, 10.0 µg/ml, Acetonitrile, 10ml Price on request 672814 Atrazine, 250mg Price on request 2852.11-50-ME 1H,1H-Perfluoroundecan-1-ol , 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 307-46-0 Price on request