Voltammetry of chromium(VI) at the liquid|liquid interface

Aoife M. O'Mahony, Micheál D. Scanlon, Alfonso Berduque, Valerio Beni, Damien W.M. Arrigan, Enrico Faggi, Andrea Bencini

Research output: Contribution to journalArticlepeer-review

Abstract

The voltammetry of hexavalent chromium (ammonium dichromate) at the interface between two immiscible electrolyte solutions is reported. Detection of Cr(VI) by ion transfer voltammetry is possible by use of an organic phase ionophore, which facilitates the transfer of Cr(VI) from the aqueous into the organic phase. The ionophore was the penta protonated form of polyamine macrocycle 2,5,8,11,14-pentaaza[15]-16,29-phenanthrolinophane (NeoTT). Cyclic voltammetry showed an increase of the peak current on increasing the concentration of Cr(VI). Square wave voltammetry with background subtraction was employed for low level concentration detection. The lowest concentration detected was 0.25 parts per million of Cr(VI).

Original languageEnglish
Pages (from-to)976-982
Number of pages7
JournalElectrochemistry Communications
Volume7
Issue number10
DOIs
Publication statusPublished - Oct 2005
Externally publishedYes

Keywords

  • Ammonium dichromate
  • Facilitated ion transfer
  • Hexavalent chromium
  • ITIES
  • Liquid|liquid interface

Fingerprint

Dive into the research topics of 'Voltammetry of chromium(VI) at the liquid|liquid interface'. Together they form a unique fingerprint.

Cite this