EPA Method 552.2 - Surrogate Standard

Paraxanthine, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 611-59-6

D5-Propachlor ESA sodium salt, 5mg

Di-n-propyl phthalate-3,4,5,6-d4,1000 µg/mL,isooctane,1mL