EPA Method 8260 Internal Standard - Revised Back Catalog number: 21013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C242950 Cefotaxime Sodium, 1g Price on request 674746 Bromoxynil-methyl ether, 10 µg/ml, Acetonitrile, Price on request C17875000 Trimethoprim, certified, 0.25g Price on request