EPA Method 551.1 Internal Standard

Ethyl heptanoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 106-30-9

DNPH-Mix 2, 215-700µg/mL in Acetonitrile, 1ml

DL-2-Phenylpropionic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 492-37-5