EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 692273 Triflusulfuron Metabolite IN-M7222, 100µg/ml in Acetonitrile, 1ml Price on request 12156.9-100-ME Acetylsalicylic acid-d4 (ring-d4),100 µg/mL,MeOH,1mL, Price on request P287595-50MG Perfluorobutylphosphonic Acid, 50mg Price on request