Interference Standard 1 Back Catalog number: 53039 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 687732 Perfluorotetradecanoic acid, 50mg Price on request EPA-23CSAV Calibration Kit; Alternate Volume, 5 x 200ul, nonane Price on request 682615 4-Hydroxy-4-methyl-2-pentanone, 1000mg Price on request