Direct Spectrophotometric Determination of Vanadium(V) Using a Recently Synthesized Hydroxytriazene Derivative

Abstract

A new hydroxytriazene (3-hydroxy-3-p-chlorophenyl-1-p-nitrophenyltriazene) has been prepared. The reagent has been used for spectrophotometric determination of vanadium(V). Vanadium forms a 1 : 1 yellowish green complex with this reagent. The complex shows maximum absorbance at 410 nm (λ_max) in the pH range of 7–9. Beer's law for determination of vanadium is obeyed in the concentration range of 0.51–3.06 μg mL^–1. Molar absorptivity and Sandell's sensitivity were found as 7463 L mol^–1 cm^–1 and 6.83 ng cm^–2, respectively. Standard deviation (σ) using ten determinations was found to be 0.009 μg mL^–1 for 2.55 μg mL^–1 of vanadium.