Gold nanoparticle included graphene oxide modified electrode: Picomole detection of metal ions in seawater by stripping voltammetry

ÜSTÜNDAĞ İ., Erkal A., KORALAY T., KADIOĞLU Y. K., Jeon S.

JOURNAL OF ANALYTICAL CHEMISTRY, vol.71, no.7, pp.685-695, 2016 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 71 Issue: 7
  • Publication Date: 2016
  • Doi Number: 10.1134/s1061934816070108
  • Journal Name: JOURNAL OF ANALYTICAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.685-695
  • Keywords: seawater sample, voltammetry, gold nanomaterial, graphene oxide, heavy metal determination, modified electrode, GLASSY-CARBON ELECTRODE, HEAVY-METALS, SEDIMENTS, CU, PB, CADMIUM, SAMPLES, WATER, FILM, AU
  • Ankara University Affiliated: Yes

Abstract

We obtained a gold nanomaterial/graphene oxide-modified glassy carbon electrode and characterized it using transmission electron microscope, scanning electron microscope, cyclic voltammetry (CV), and X-ray photoelectron spectroscopy techniques. A response of the electrode using square wave anodic stripping voltammetry for Pb2+, Cu2+, and Hg2+ was found linear in the range from 1 x 10(-7) to 1 x 10(-11) M. The detection limits of Pb2+, Cu2+ and Hg2+ were 0.14, 0.5 and 1.2 pM, respectively. The method was applied to the simultaneous determination of Pb2+, Cu2+ and Hg2+ in seawater samples from a coastal region of Anatolia, and the results corresponded well with the values obtained by inductively coupled plasma-optical emission spectroscopy.