EPA Method 8260 Internal Standard - Revised Back Catalog number: 21013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676844 Rafoxanide, 100mg Price on request 9838.12-K-ME Furosemid, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 54-31-9 Price on request 57219 Potassium (K) Price on request