N,N′-Bis(2-Aminobenzoyl)ethylenediamine as a Reagent for the Spectrophotometric Determination of Neodymium(III)

A simple, direct, rapid and cost effective spectrophotometric method is described for the determination of neodymium(III) in pure form, natural samples and industrial effluents. When neodymium(III) complexes with N,N'-bis(2-aminobenzoyl)ethylenediamine in the pH range of 6.0-7.5, it shows an absorption maxima at 350 nm and obeys Beer's law in the concentration range of 3.04-13.17 mu g mL(-1). The absorbance was found to increase linearly with increasing concentration of neodymium(III); the apparent molar absorptivity of the species is 0.214 x 10(4) L mol(-1) cm(-1). The validity of the described procedure was assessed. Statistical analysis of the result has been carried out revealing high accuracy and good precision. The proposed method has been successfully applied to the determination of Nd(III) in natural samples and industrial effluents without much interference from foreign ions.