Issue 23, 2019

Addressing the practicalities of anodic stripping voltammetry for heavy metal detection: a tutorial review

Abstract

Anodic Stripping Voltammetry (ASV) has the capability to detect heavy metals at sub ppb-level with portable and cheap instrumentation making it ideal for in the field (at the source) analysis, however, commercial activity is surprisingly limited. The more commonly used liquid mercury electrodes are now obsolete due to toxicity concerns, and replacements are all based around solid electrodes, which come with their own challenges. This tutorial review aims to discuss the experimental practicalities of ASV, providing a clear overview of the issues for consideration, which can serve as a guide for anyone wanting to undertake analytical ASV. Choice of electrode material (with or without subsequent modification) and solution composition (pH, electrolyte, buffer) are important parameters, as well as an understanding of pH dependent metal speciation and possible intermetallic effects. Measurements made on model solutions often differ from those made on environmental samples with the latter containing organic matter, biological and inorganic species, which themselves can adsorb metal ions. Consideration should also be given to the method of solution collection and the sample container utilised. ASV can be a powerful tool to an analytical chemist, however optimisation for the application of interest is essential, which this review aims to help guide.

Graphical abstract: Addressing the practicalities of anodic stripping voltammetry for heavy metal detection: a tutorial review

Article information

Article type
Tutorial Review
Submitted
29 Jul 2019
Accepted
13 Oct 2019
First published
15 Oct 2019
This article is Open Access
Creative Commons BY license

Analyst, 2019,144, 6834-6849

Addressing the practicalities of anodic stripping voltammetry for heavy metal detection: a tutorial review

A. J. Borrill, N. E. Reily and J. V. Macpherson, Analyst, 2019, 144, 6834 DOI: 10.1039/C9AN01437C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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