Internal Standard ASTM D-5307

Parathion,100 µg/mL,cyclohexane,1mL,

Amitriptyline hydrochloride, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 549-18-8

4-Ethylguaiacol, 100 µg/ml, Acetonitrile, 1ml