EPA Method 8260B Purgeable Internal Standard Back Catalog number: 28013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673122 Cholecalciferol, 100mg Price on request N-MEFOSAA N-methylperfluoro-1-octanesulfonamidoacetic acid, 50µg/ml in MeOH, 1,2ml Price on request 678157 Furalaxyl, 100 µg/ml, Acetonitrile, 1ml Price on request