EPA Method 500 Series Internal Standard #5 Back Catalog number: 30004 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 677018 Imidacloprid olefin, 10.0 µg/ml, Acetonitrile, 5 Price on request BCR-535 Freshwater harbour sediment - PAHs, 40g Price on request 679110 Deltamethrin, 10.0 µg/ml, Cyclohexane, 10ml Price on request