Study on the Interaction of Dioxovanadium(V) with Nitrilotriacetic Acid at Different Ionic Strengths by Using Extended Debye-Hiickel Equation

Document Type : Research Paper




In this research complexation of dioxovanadium(V) with nitrilotriacetic acid (NTA) at different
ionic strengths (0.1 to 1.0 mol dm-3) of sodium perchlorate as supporting electrolyte and pH range
of 1.00-2.50 at 25 °C has been investigated by a combination of potentiometric and UV
spectrophotometric measurements. Stability constants of two species, V0211L- and VO2H2L have
been calculated. Ionic strength dependence semi-empirical parameters for the dissociation and
stability constants were derived on the basis of extended Debye-Htickel type equation.