EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673368 Isofenphos-oxon, 10 µg/ml, Acetonitrile, 10ml Price on request CL-PFOPA 8-Chloroperfluorooctylphosphonic acid, 50µg/ml in MeOH, 1,2ml Price on request 681024 Coumaphos, 10.0 µg/ml, Cyclohexane, 10ml Price on request