EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19149 2,3,7,8-Tetrachlorodibenzo-p-dioxin Price on request 56225 Manganese (Mn) Price on request 676370 Tridecafluorohexane-1-sulfonic acid potassium salt Price on request