EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 683266 Perfluorooctanesulfonyl fluoride, 100mg Price on request 674045 Celiprolol, 10.0 µg/ml, Acetonitrile, 10ml Price on request 11248.30-100-AN Bromdiolone-d5 (phenyl-d5) (mixture of diastereomers),100 µg/mL,acetonitrile,1mL, Price on request