Simultaneous determination of iron and copper using screen-printed carbon electrodes by adsorptive stripping voltammetry with o-phenanthroline


Ustabasi G. S. , Perez-Rafols C., Serrano N., Diaz-Cruz J. M.

MICROCHEMICAL JOURNAL, vol.179, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 179
  • Publication Date: 2022
  • Doi Number: 10.1016/j.microc.2022.107597
  • Title of Journal : MICROCHEMICAL JOURNAL
  • Keywords: Iron, Copper, Adsorptive stripping voltammetry, o-phenanthroline, Ferrocyanide, Screen-printed electrodes, HEAVY-METAL IONS, SEAWATER, EQUILIBRATION, SPECIATION, COMPLEXES, CADMIUM, CD(II), PB(II), CU(II), WATERS

Abstract

The simultaneous voltammetric determination of iron and copper was accomplished by an unmodified screen printed carbon electrode based on the complexation with o-phenanthroline assisted by the reducing agent ferrocyanide. The detection limits were 3.74 and 0.34 mu g L-1 for iron and copper, respectively, and a linear response was observed from 12.5 to 400 mu g L-1 for iron and from 1.14 to 400 mu g L-1 for copper. This method successfully avoids interferences between iron and copper while allowing the simultaneous determination of both low and high metal concentrations usually found in the environment. Finally, a certified wastewater reference material was successfully analyzed, confirming the precision and accuracy of the proposed method.