EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92710 Acetophenone & Benzophenone Price on request A10946020AL-1000 Cannabidiolic acid (CBDA), 1000µg/mL in Acetonitrile, 1ml Price on request X9122 Isodrin Price on request