Spectrophotometric determination of copper using o-vanillidine-2-amino-4- ethylbenzothiazole as a chromogenic reagent

摘要

A simple Spectrophotometric method is proposed for the determination of copper using o-Vanillidine-2-amino-4- ethylbenzothiazole (VEBT). The copper ions react with theSchiff’s base at room temperature to form 1:2 [Metal: Ligand] complex. Beer’s law obeyed over the range 0.41μg mL-1 to 3.78μg mL-1 of copper.Brownish yellow coloured complex formed was measured at λmax 450nm in aqueous methanol solution. The proposed method offers the sensitivity, rapidity, selectivity and without any prior separation and extraction. The method is free from the interference of metal ions like zinc, cadmium, cobalt, iron, lead and mercury. The method has been successfully applied for the determination of trace amount of copper in Industrial effluents.