EPA Method 8260B Internal Standard Back Catalog number: 22213 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678263 Bifenazate, 100 µg/ml, Acetonitrile, 1ml Price on request 72167 Fumaric acid Price on request 678461 Prochloraz, 100 µg/ml, Acetonitrile, 5ml Price on request