ABSTRACT
Amitriptyline and desipramine hydrochlorides react with niobium (V) thiocyanate complex forming yellow ion-association compounds. These compounds are insoluble in water, but fairly soluble in organic solvents. The formation and extraction conditions of the compounds have been established, and a new spectrophotometric method has been developed for the determination of amitriptyline and desipramine in the concentration range of 1–12 µg/mL and 1–6 µg/mL, respectively.