EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended N-12738-250MG Oxolinic acid, 250mg Price on request 0604.27-100-IO Cholest-5-ene, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 570-74-1 Price on request 0737.14-500-IO Eudalene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 490-65-3 Price on request