Atomic absorption spectrometric determination of copper after adsorption of its sodiumdiethyldithiocarbamate complex on a new polymeric adsorbent

Abstract

An atomic absorption spectrometric method for the determination of trace amounts of copper in various synthetic samples after adsorption of its sodiumdiethyldithiocarbamate complex on a new polymeric adsorbent has been developed. The copper complex is quantitatively adsorbed on the polymeric adsorbent in the <i>p</i>H range of 2.9-9.0. After filtration, the copper

complex is eluted with 10 mL of dimethyl formamide and the metal is determined by atomic absorption spectroscopy. Beer's law is obeyed in the concentration range 0.15-2.0 ppm of copper in the final DMF solution with a correlation factor of 0.9989. Ten replicates of 2 ppm of Cu give a mean absorbance of 0.209 with a relative standard deviation of 1.6%. Various experimental conditions such as effect of <i>p</i>H on complexation/adsorption retention, volume of buffer solution, amount of reagent, amount of adsorbent, standing time, flow rate, volume of aqueous phase, choice of organic solvent have been optimized.