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Issue 15, 2014
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Electrochemical detection of p-ethylguaiacol, a fungi infected fruit volatile using metal oxide nanoparticles

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Abstract

Nanoparticles of TiO2 or SnO2 on screen-printed carbon (SP) electrodes have been developed for evaluating their potential application in the electrochemical sensing of volatiles in fruits and plants. These metal oxide nanoparticle-modified electrodes possess high sensitivity and low detection limit for the detection of p-ethylguaiacol, a fingerprint compound present in the volatile signature of fruits and plants infected with a pathogenic fungus Phytophthora cactorum. The electroanalytical data obtained using cyclic voltammetry and differential pulse voltammetry showed that both SnO2 and TiO2 exhibited high sensitivity (174–188 μA cm−2 mM−1) and low detection limits (35–62 nM) for p-ethylguaiacol detection. The amperometric detection was highly repeatable with RSD values ranging from 2.48 to 4.85%. The interference studies show that other common plant volatiles do not interfere in the amperometric detection signal of p-ethylguaiacol. The results demonstrate that metal oxides are a reasonable alternative to expensive electrode materials such as gold or platinum for amperometric sensor applications.

Graphical abstract: Electrochemical detection of p-ethylguaiacol, a fungi infected fruit volatile using metal oxide nanoparticles

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Publication details

The article was received on 25 Feb 2014, accepted on 15 Apr 2014 and first published on 16 Apr 2014


Article type: Paper
DOI: 10.1039/C4AN00384E
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Analyst, 2014,139, 3804-3810

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    Electrochemical detection of p-ethylguaiacol, a fungi infected fruit volatile using metal oxide nanoparticles

    Y. Fang, Y. Umasankar and R. P. Ramasamy, Analyst, 2014, 139, 3804
    DOI: 10.1039/C4AN00384E

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