EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72226 Oxprenolol Price on request PFPRA Perfluoropropanoic acid, 50µg/ml in MeOH, 1,2ml Price on request 675176 2,3,5-Trimethylphenol, 250mg Price on request