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Electrochemical Hg2+ detection at tannic acid-gold nanoparticle modified electrodes by square wave voltammetry

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Abstract

We report the electrochemical sensing of Hg2+ based on tannic acid capped gold nanoparticle (AuNP@TA) complexes. At optimal conditions using square wave voltammetry, the presented analytical method exhibits a “measurable lower limit” of 100.0 fM. This limit is considerably below the permissible level of 30.0 nM for inorganic mercury in drinking water, specified by the World Health Organization (WHO). The effect of potentially interfering ions, such as Zn2+ and Al3+, was studied and results indicate an excellent selectivity for Hg2+. The transfer of the proposed strategy onto AuNP@TA modified screen-printed electrodes demonstrates its applicability to routine monitoring of Hg2+ in tap water.

Graphical abstract: Electrochemical Hg2+ detection at tannic acid-gold nanoparticle modified electrodes by square wave voltammetry

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Publication details

The article was received on 19 Mar 2018, accepted on 06 Apr 2018 and first published on 07 Apr 2018


Article type: Paper
DOI: 10.1039/C8AN00508G
Citation: Analyst, 2018, Advance Article
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    Electrochemical Hg2+ detection at tannic acid-gold nanoparticle modified electrodes by square wave voltammetry

    A. L. Suherman, S. Kuss, E. E. L. Tanner, N. P. Young and R. G. Compton, Analyst, 2018, Advance Article , DOI: 10.1039/C8AN00508G

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