A solid-phase extraction system for preconcentration and determination of copper in various samples has been proposed. Eriochrome blue black R [1-(2-hydroxy-1-naphtylazo)-2-naphtol-4-sulfonic acid] loaded Amberlite XAD-1180 resin was used as sorbent. Copper(II) ions were sorbed on the column filled with the chelating resin, and the elution of the retained analyte on the column was performed with 1 mol/L nitric acid solution. Analytical parameters were evaluated, and the results indicate that copper can be determined in the pH range of 3.0-10.0. Preconcentration factor was 60 and optimum flow rate of sample was 4.0 mL/min. The detection limit based on the criteria of 3 s was found to be 1.3 mu g/L and the relative standard deviation of the method was 3.3% for 2.5 mg/L level of the analyte ion. The adsorption behavior of copper onto Amberlite XAD-1180 can formally be described by Langmuir equation with a maximum adsorption capacity of 0.90 mg/g. The accuracy of the method was confirmed by analyzing a certified waste water. A good agreement was found between the results and the certified values. This procedure was applied to the determination of copper in river and sea waters, dialysis solutions, and fertilizer samples.
A solid-phase extraction system for preconcentration and determination of copper in various samples has been proposed. Eriochrome blue black R [1-(2-hydroxy-1-naphtylazo)-2-naphtol-4-sulfonic acid] loaded Amberlite XAD-1180 resin was used as sorbent. Copper(II) ions were sorbed on the column filled with the chelating resin, and the elution of the retained analyte on the column was performed with 1 mol/L nitric acid solution. Analytical parameters were evaluated, and the results indicate that copper can be determined in the pH range of 3.0-10.0. Preconcentration factor was 60 and optimum flow rate of sample was 4.0 mL/min. The detection limit based on the criteria of 3 s was found to be 1.3 mu g/L and the relative standard deviation of the method was 3.3% for 2.5 mg/L level of the analyte ion. The adsorption behavior of copper onto Amberlite XAD-1180 can formally be described by Langmuir equation with a maximum adsorption capacity of 0.90 mg/g. The accuracy of the method was confirmed by analyzing a certified waste water. A good agreement was found between the results and the certified values. This procedure was applied to the determination of copper in river and sea waters, dialysis solutions, and fertilizer samples.
