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Issue 22, 2014
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Introducing absorptive stripping voltammetry: wide concentration range voltammetric phenol detection

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Abstract

Carbon paste electrodes are developed for the detection of phenols via a procedure in which the phenols are allowed to accumulate in the paste via transfer from an aqueous solution prior to electro-oxidation. Importantly, the use of such paste electrodes is shown to substantially overcome the “self-passivating” behaviour of the phenol oxidation which usually constrains the electrode process to low concentrations and single-shot experiments. In this paper, 4-phenoxyphenol could be detected in the range from 2.5 to 40 μM, phenol from 2.5 μM to 60 mM and 4-methoxyphenol from 5.0 to 40 μM. The electrodes were re-usable without surface renewal for concentrations up to 1.0 mM. The use of a bulk phenol solution for pre-concentration via absorptive uptake into a bulk phase followed by electrochemical quantification represents a new form of electroanalysis, namely “absorptive stripping voltammetry” complementary to “adsorptive stripping voltammetry” where accumulation occurs via adsorption on an electrode surface.

Graphical abstract: Introducing absorptive stripping voltammetry: wide concentration range voltammetric phenol detection

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Publication details

The article was received on 01 Aug 2014, accepted on 12 Sep 2014 and first published on 12 Sep 2014


Article type: Paper
DOI: 10.1039/C4AN01417K
Author version available: Download Author version (PDF)
Citation: Analyst, 2014,139, 5911-5918
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    Introducing absorptive stripping voltammetry: wide concentration range voltammetric phenol detection

    R. Nissim and R. G. Compton, Analyst, 2014, 139, 5911
    DOI: 10.1039/C4AN01417K

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