EPA Method 8260B Mix #4 Back Catalog number: 82466 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2835.7-50-ME 7H-Perfluoroheptanoic acid, 50µg/ml in MeOH, 1ml Price on request 673390 Monocrotophos, 10.0 µg/ml, Acetonitrile, 10ml Price on request 95403 Aroclor 1232 & Tetrachloro-m-xylene Price on request