Abstract
The spectrophotometric determination of Cu II with an anthraquinone derivative (Alizarin Red S) has been investigated. Experimental conditions such as the pH of the sample and concentration of ligand were optimized. This method is a simple and sensitive method for determination of Cull ion. The interfering effects of diverse ions were investigated. Copper ion was determined by measuring the absorbance of Cu II -ARS complex at 510 nm. Beer's law is obeyed over the concentration range of 0.011-0.320 mM and the detection limit (S/N = 3) is 0.038 ppm. The relative standard deviation at the 20 ppm is 1.02% (N = 5). The method was applied for the real samples.
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