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Issue 18, 2018
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The preparation of a flexible AuNP modified carbon cloth electrode and its application in electrochemical detection of Hg(II) by continuous flow in environmental water

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Abstract

In this article, a carbon cloth composite electrode modified with gold nanoparticles (AuNPs) was prepared by a facile in situ electrodeposition method and applied to the detection of mercury ions in water. With the optimized electrochemical detection conditions and methods, the limit of detection (LOD) was 0.6 μg L−1 with the linearity ranging from 2 to 200 μg L−1 by the SWSV detection method, and the electrode showed good repeatability after many cycles. Based on this detection method, a continuous flow electrochemical detection system was constructed and applied to the detection of Hg ions in environmental water samples. The standard addition experimental results of two real water samples with an addition level of 10 and 50 μg L−1 showed that the recoveries were between 92.4% and 108.9% with RSDs from 2.01% to 3.22%. These results showed the same performance as that of the ZAAS mercury detection method (recovery: 94–102.4%, RSD 2.09–5.4%). Compared with other electrode materials, a shorter detection time, a wider linear range and high stability with a similar LOD can be achieved by a continuous flow detection method by using the composite electrode. The established continuous flow electrochemical detection system would have promising application in online and real-time detection of heavy metals in environmental water.

Graphical abstract: The preparation of a flexible AuNP modified carbon cloth electrode and its application in electrochemical detection of Hg(ii) by continuous flow in environmental water

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Publication details

The article was received on 13 Jul 2018, accepted on 01 Aug 2018 and first published on 03 Aug 2018


Article type: Paper
DOI: 10.1039/C8AN01284A
Citation: Analyst, 2018,143, 4436-4441
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    The preparation of a flexible AuNP modified carbon cloth electrode and its application in electrochemical detection of Hg(II) by continuous flow in environmental water

    P. Guan, P. Guo, N. Liu, F. Zhang and Y. Lei, Analyst, 2018, 143, 4436
    DOI: 10.1039/C8AN01284A

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