EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8489.25-10-IO (1R,4aR,5aR,8aR,10aR)-1-(4-methylpentyl)-1,6,6,8a,10a-pentamethylperhydrophenanthrene Price on request 11217.25-100-IO Trixylyl phosphate, purified ion m/z 424 (heptamethyl),100 µg/mL,isooctane,1mL, Price on request 1328.14-100-T 2-Fluorophenanthrene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 523-41-1 Price on request