Abstract
A study into the sonoelectroanalysis of silver at a highly boron-doped diamond electrode is presented, exploring the benefits of the introduction of power ultrasound and new electrode materials into classical electrochemical techniques. Both cathodic and anodic stripping voltammetry have been investigated in terms of their analytical suitability towards silver detection. Cathodic stripping voltammetry, via electrodeposited silver oxide, was affected by the unusual chemistry of the highly oxidizing Ag2+ species and the characterization of this system is discussed in detail. Anodic stripping, via deposition of metallic silver on the bare boron-doped diamond electrode surface under ultrasound, coupled with square-wave voltammetry, was successfully employed in the development of a sensitive technique for the analysis of trace silver ions. A detection limit for Ag+ of 10-9 M for a 300-s deposition, with a linear range of at least two orders of magnitude, and the beneficial effects of controlling the speciation of Ag+ via complexation with chloride ions are reported.
| Original language | English |
|---|---|
| Pages (from-to) | 403-415 |
| Number of pages | 13 |
| Journal | Talanta |
| Volume | 53 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Nov 2000 |
Funding
A.J. Saterlay would like to thank Alcan and the EPSRC for a CASE studentship for and the EPSRC for financial support (Grant Number GR/L/36413) under the Analytical Sciences programme. F. Marken thanks the Royal Society for the award of a University Research Fellowship and New College for a Stipendiary Lectureship. We also thank G. Scarsbrook, R.S. Sussmann and A.J. Whitehead of De Beers Industrial Diamond Division (UK) Ltd., for the kind loan of the boron-doped diamond electrode used in this work.
Keywords
- Silver oxide
- Sonoelectroanalysis
- Speciation
- Stripping voltammetry
ASJC Scopus subject areas
- Analytical Chemistry