EPA Method 507/1656 Nitrogen Phosphorus

Amitriptyline hydrochloride, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 549-18-8

4-tert-Amylphenol, certified, 0.25g

Chlordimeform, 100 µg/ml, Ethyl acetate, 1ml