EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70259 Pyrene Price on request 1144.24-K-IO n-Tetracosane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 646-31-1 Price on request 11697.12-100-IO 2,3,4,6-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request