EPA Method 551.1 Performance Check Sol’n Back Catalog number: 30115 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1328.14-100-T 2-Fluorophenanthrene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 523-41-1 Price on request 681223 Formothion, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 83580 Acifluorfen Price on request