UV Spectrophotometric Determination of Cu(II) in Synthetic Mixture and Water Samples

Abstract A new and novel UV spectrophotometric method has been developed for the determination Cu(II) in synthetic mixture and water samples. The method is based on complex formation of Cu(II) with cefixime immediately in 1,4‐dioxan‐distilled water medium at room temperature. The complex showed maximum absorption wavelength at 336 nm. Beer's law is obeyed in the concentration range of 1.015‐8.122 μg mL−1(Linear regression: A = 1.59 × 10−3+ 1.305 × 10−1C) with apparent molar absorptivity (8.29 × 103L mol−1cm−1) and Sandell's sensitivity (0.008 μg/cm2/0.001 absorbance unit). The limits of detection and quantitation for the developed method are 3.19 × 10−2and 9.65 × 10−2μg mL−1, respectively. Interferences due to Mn(II), Ca(II), Mg(II), Cd(II), Al(III), Pb(II), Zn(II), Fe(II), Fe(III), Ni(II), Cr(III), Hg(II) and As(III) was investigated. Nine cations do not interfere in the determination of Cu(II). Proposed method was successfully applied to the determination of Cu(II) in synthetic mixture, sea and well water samples.