EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675574 Fenamidone, 10 µg/ml, Ethyl acetate, 10ml Price on request 38222 AK101GRO C6-C10 in Water PT Price on request 679293 Tolprocarb, 100 µg/ml, Acetonitrile, 1ml Price on request