Determination of Hg2+ on poly(vinylferrocenium) (PVF+)-modified platinum electrode

Celebi M. S., Ozyoruk H., Yildiz A., ABACI S.

TALANTA, vol.78, no.2, pp.405-409, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 78 Issue: 2
  • Publication Date: 2009
  • Doi Number: 10.1016/j.talanta.2008.11.028
  • Journal Name: TALANTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.405-409
  • Hacettepe University Affiliated: Yes

Abstract

A new surface based on poly(vinylferrocenium) (PVF+)-modified platinum electrode was developed for determination of Hg2+ ions in aqueous solutions. The polymer was electrodeposited on platinum electrode by constant potential electrolysis as PVF+ClO4- Cl- ions were then attached to the polymer matrix by anion exchange and the modified electrode was dipped into Hg2+ solution. Hg2+ was preconcentrated at the polymer matrix by adsorption and also complexation reaction with Cl-. Detection of Hg2+ was carried out by differential pulse anodic stripping voltammetry (DPASV) after reduction of Hg2+. Mercury ions as low as 5 x 10(-10) M could be detected with the prepared electrode and the relative standard deviation was calculated as 6.35% at 1 x 10(-6) M concentration (n = 6). interferences of Ag+, Pb2+ and Fe3+ ions were also studied at two different concentration ratios with respect to Hg2+. The developed electrode was applied to the determination of Hg2+ in water samples. (c) 2008 Elsevier B.V. All rights reserved.