Electrochemical co-detection of As(III), Hg(II) and Pb(II) on a bismuth modified exfoliated graphite electrode

Mafa, Potlako J.; Idris, Azeez O.; Mabuba, Nonhlangabezo; Arotiba, Omotayo A.

doi:10.1016/j.talanta.2016.03.003

Cited by 87 publications

(32 citation statements)

References 27 publications

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“…The applicability of electrodeposited Bi nanoparticles on an exfoliated graphite (EG) electrode was investigated for the co‐detection of As 3+ , Hg 2+ , and Pb 2+ , with limits of detection (LODs) of 0.83 μg L −1 for As 3+ and 0.46 μg L −1 for coexisting Pb 2+ and Hg 2+ . Real water samples from South Africa were examined after passing through a 0.2 μm filter, showing results comparable with those obtained by ICP‐OES technique …”

Section: Electrode Materials For Heavy Metal Sensingsupporting

confidence: 54%

“…( Table ). Preparation of the final electrode requires the prerequisite process of functional material synthesis and a secondary casting process . The functional materials usually consist of conductive frameworks with functional component containing rich metal attachment sites and/or binding agents, including carbon, bismuth, MOF, and a fixed mass of graphite powder or liquid paraffin.…”

Section: Design Of Electrode Integrationmentioning

confidence: 99%

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Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Hou

Zeinu

Gao

et al. 2018

Energy & Environ Materials

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The increase in release of toxic heavy metals into natural water attracts much attention due to its devastating effect on ecology and human health. The design and implementation of green electrode materials is pivotal for improving the electrochemical performance of in situ heavy metal monitoring. This work reviews various novel electrode materials and hybrid materials that improve electrochemical detection. Modified green and novel electrode materials offer better performance due to their improved deposition with wide linear and enhanced response under optimized sensing parameters. In particular, recent works related to gold, carbon materials, bismuth, and metal oxide‐based electrodes are reviewed. The environmentally friendly (“green”) characteristics, as well as their versatility and flexibility, are especially emphasized. In addition, synthesis methods and novel designs of electrode integration are highlighted. Most of the substantial achievements as well as breakthroughs in recent years are surveyed, and the challenges and prospective in this field are also identified.

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Section: Electrode Materials For Heavy Metal Sensingsupporting

confidence: 54%

Section: Design Of Electrode Integrationmentioning

confidence: 99%

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Hou

Zeinu

Gao

et al. 2018

Energy & Environ Materials

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“…The linear plot of change in current (Δi) against Hg concentration (c) shows that the regression equation from the liner a plot was y(Δi)=0.0826x (c)+0.06186, with the correlation coefficient of 0.9968. The limit of detection (LOD) and limit of quantifications (LOQ) were calculated using 3 σ/m and 10 σ/m respectively, where the standard deviation (σ) was obtained from blank and m is the slope of the calibration curve (n=6). The LOD was found to be 0.1 μg L −1 whereas the LOQ was calculated as 0.515 μg L −1 .…”

Section: Resultsmentioning

confidence: 99%

Application of a Polypyrrole/Carboxy Methyl Cellulose Ion Imprinted Polymer in the Electrochemical Detection of Mercury in Water

et al. 2018

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Sulphur containing carboxy methyl ion imprinted polymers (S‐IIPs) were applied as an electrode modifier for the electrochemical detection of Hg(II). A bare glassy carbon electrode (GCE) was modified by electro‐polymerizing a layer of pyrrole and then drop coating with S‐IIPs. The bare GCE, GCE/polypyrrole (GCE/PPy), GCE/polyprrole/non‐ion imprinted polymers (GCE/PPy/NIPs) and the GCE/polypyrrole/sulphur ion imprinted polymers (GCE/PPy/S‐IIPs) electrodes were characterised with Fourier Transmission Infrared (FTIR) and electrochemical impendence spectroscopy (EIS). The square wave anodic stripping voltammetry (SWASV) optimised conditions for the GCE/PPy/S‐IIPs were: a pH of 3, deposition potential of −1.0 V, pre‐concentration time of 60 s and 0.1 M HCl supporting electrolyte. The developed ion imprinted polymer electrochemical sensor was applied in the detection of Hg(II) in water. A detection limit of 0.1 μg L−1 was calculated within a concentration range of 20–800 μg L−1. The sensor was selective in the presence of interfering ions and method was validated with inductively coupled plasma‐optical emission spectrometry (ICP‐OES) using real water and standard water samples.

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“…(5) The analysis can be simplified by: the replacement of precious metal electrodes by inexpensive materials [44,47,33,60,[99][100][101][102][103][104]; analysis without removing oxygen from solution [38,55,75,91]; minimizing the sample preparation stage by eliminating the reduction of As(V) to As(III), and speciation of As in the field. Automation of procedures is helpful and there has been some research aimed at creating microfluidic total analysis systems which would be ideal for this purpose [4].…”

Section: As(iii) Determination By Anodic Stripping Voltammetry (Asv)mentioning

confidence: 99%

Inorganic arsenic speciation by electroanalysis. From laboratory to field conditions: A mini-review

Antonova

Захарова

2016

Electrochemistry Communications

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Electrochemical co-detection of As(III), Hg(II) and Pb(II) on a bismuth modified exfoliated graphite electrode

Cited by 87 publications

References 27 publications

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Application of a Polypyrrole/Carboxy Methyl Cellulose Ion Imprinted Polymer in the Electrochemical Detection of Mercury in Water

Inorganic arsenic speciation by electroanalysis. From laboratory to field conditions: A mini-review

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