Dr Kevin Honeychurch Kevin.Honeychurch@uwe.ac.uk
Senior Lecturer in Forensic Science
The voltammetric behaviour of lead at a hand drawn pencil electrode and its trace determination in water by stripping voltammetry
Honeychurch, Kevin C.
Authors
Abstract
© The Royal Society of Chemistry 2015. This is the first reported proof of concept application of pencil drawn electrodes (PDEs) for anodic stripping voltammetric determination of Pb2+ or any metal ion. PDEs offer advantages of economics, simplicity and rapid fabrication, affording a green alternative for the development of new devices. Cyclic voltammetric investigations of Pb2+ at these electrodes in 0.30 M acetic acid were characterised by a cathodic reduction peak on the initial negative scan resulting from the reduction of Pb2+ ions to Pb0. Anodic peaks obtained on the return positive scan showed that Pb had been deposited as a thin film on the PDE surface. The addition of Cl- ions to this electrolyte improved the voltammetric behaviour and a supporting electrolyte of 0.30 M acetic acid containing 0.25 M KCl was found to be optimum. Investigations were made into the possibility of determining trace levels of Pb2+ by differential pulse anodic stripping voltammetry. The effect of accumulation potential and time were investigated and optimised. Three anodic stripping peaks were recorded resulting from the heterogeneous nature of the electrode surface. Using an accumulation potential of -1.1 V and an accumulation time of 200 s a bimodal calibration curve was recorded, with linear ranges between 80 to 330 ng mL-1 and 330 to 915 ng mL-1. The theoretical detection limit (3σ) was calculated as 9.5 ng mL-1. Pb2+ determinations on a drainage water sample gave a mean recovery of 100.9% (CV% = 5.7%) at a concentration of 166.1 ng mL-1 indicating the method holds promise for the determination of Pb2+ in such samples.
Journal Article Type | Article |
---|---|
Publication Date | Jan 1, 2015 |
Publicly Available Date | Jun 6, 2019 |
Journal | Analytical Methods |
Print ISSN | 1759-9660 |
Electronic ISSN | 1759-9679 |
Publisher | Royal Society of Chemistry |
Peer Reviewed | Peer Reviewed |
Volume | 7 |
Issue | 6 |
Pages | 2437-2443 |
DOI | https://doi.org/10.1039/c4ay02987a |
Keywords | carbon electrodes, pencil, stripping voltammetry, lead |
Public URL | https://uwe-repository.worktribe.com/output/837072 |
Publisher URL | http://dx.doi.org/10.1039/C4AY02987A |
Related Public URLs | http://pubs.rsc.org/en/journals/journalissues/ay#!recentarticles&all |
Additional Information | Additional Information : First published online 02 Feb 2015 |
Files
Corrected resubmission Pencil-drawn electrodes Pb DPASV The Analyticval Methods 18 1 15.pdf
(570 Kb)
PDF
You might also like
Under-researched and under-reported new findings in microplastic field
(2024)
Journal Article
Digital image colorimetry smartphone determination of acetaminophen
(2023)
Journal Article
WATER'S SILENT HORMONE MONITORING: A novel electrochemical sensor for on-site detection of estradiol in water
(2023)
Presentation / Conference Contribution
Downloadable Citations
About UWE Bristol Research Repository
Administrator e-mail: repository@uwe.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2025
Advanced Search