EPA Method 507/1656 Nitrogen Phosphorus Back Catalog number: 31782 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676302 2-Fluorofluorene, 10 µg/ml, Cyclohexane, 10ml Price on request 673596 Fenvalerate, 100 µg/ml, Ethyl acetate, 5ml Price on request 0296.19-200-T 5-Methylchrysene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 3697-24-3 Price on request