Anodic stripping voltammetry by using carbon paste electrode for the determination of some trace heavy metals and application of treated wastewater and natural water

Abstract EN

In the present work, the carbon paste electrode was used for the anodic stripping voltammetry in flow-injection system procedure and has been developed for simultaneous determination of Zn, Cu, Pb, and Cd.

The quantitative determination for these elements is possible at low concentration of Fe when using supporting electrolyte mixture of 0.1 molL-1 Na2P2O7 and 0.2 molL-1 acetate buffer at pH 4.

The proposed method was evaluated and applied for wastewater and natural water samples.

The working ranges are 40-350 μgL-1 for Cu, 50-250 μgL-1 for Cd, and Pb, and 80-400 μgL-1 for Zn, with detection limits of 15.5, 21.21, 34.54, and 58.14μg L-1 for Cu, Cd, Pb and Zn, respectively.

RSD% range was (4.21% -1.26%) and recovery range was (98.19% -100.7%).

The Fe content was negligible in these samples.