EPA Method 528 Internal Standard

Noramitriptyline hydrochloride, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 894-71-3

4-n-Butyldibenzothiophene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 147792-33-4

Benzyl-n-butyl phthalate-d4, 100µg/ml in IO, 1ml