Perfluorooctane sulfonic acid, potassium salt,50 µg/mL,MeOH,1mL,

3-Methyldibenzothiophene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 16587-52-3

Nortriptyline hydrochloride, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 894-71-3

EPA Method 509 Internal Standard