EPA Method 8260B - Purgeable Internal Std

Arachidonic acid (5,8,11,14 all-cis), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 506-32-1

EPA Method 8240A Internal Standard

Isopropylcyclopentane, 1000µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 3875-51-2