Arsenic (III) detection with underpotential deposition on gold

Yifei Zhang; Danlei Li; Richard G. Compton

doi:10.1016/j.jelechem.2022.116154

Arsenic (III) detection with underpotential deposition on gold

Yifei Zhang, Danlei Li, Richard G. Compton^*

^*Corresponding author for this work

University of Oxford

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

We report a new, sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using either a gold macroelectrode or a gold nanoparticle-modified glassy carbon electrode (GCE) based on the underpotential deposition (UPD) of As ad-atoms. The pre-concentration step deposits and accumulates As ad-atoms onto gold and is followed by a potential sweep to strip the ad-atoms with no interference from Cu(II) or Cl^- at either electrode. Linear responses were found for the range 0.01 μM to 0.1 μM or 0.005 μM to 0.1 μM at gold macroelectrodes and gold nanoparticle-modified electrodes, respectively. The visually clearly discernable signals recorded at 0.005 μM (0.4 ppb) on gold nanoparticle-modified electrodes suggests that this method has practical value given the WHO limit of 0.13 μM (10 ppb) for drinking water.

Original language	English
Article number	116154
Journal	Journal of Electroanalytical Chemistry
Volume	909
DOIs	https://doi.org/10.1016/j.jelechem.2022.116154
Publication status	Published - 15 Mar 2022
Externally published	Yes

Keywords

Anodic stripping voltammetry
Arsenic
Electroanalysis
Gold nanoparticles
Underpotential deposition

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10.1016/j.jelechem.2022.116154

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title = "Arsenic (III) detection with underpotential deposition on gold",

abstract = "We report a new, sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using either a gold macroelectrode or a gold nanoparticle-modified glassy carbon electrode (GCE) based on the underpotential deposition (UPD) of As ad-atoms. The pre-concentration step deposits and accumulates As ad-atoms onto gold and is followed by a potential sweep to strip the ad-atoms with no interference from Cu(II) or Cl- at either electrode. Linear responses were found for the range 0.01 μM to 0.1 μM or 0.005 μM to 0.1 μM at gold macroelectrodes and gold nanoparticle-modified electrodes, respectively. The visually clearly discernable signals recorded at 0.005 μM (0.4 ppb) on gold nanoparticle-modified electrodes suggests that this method has practical value given the WHO limit of 0.13 μM (10 ppb) for drinking water.",

keywords = "Anodic stripping voltammetry, Arsenic, Electroanalysis, Gold nanoparticles, Underpotential deposition",

author = "Yifei Zhang and Danlei Li and Compton, {Richard G.}",

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doi = "10.1016/j.jelechem.2022.116154",

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TY - JOUR

T1 - Arsenic (III) detection with underpotential deposition on gold

AU - Zhang, Yifei

AU - Li, Danlei

AU - Compton, Richard G.

PY - 2022/3/15

Y1 - 2022/3/15

N2 - We report a new, sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using either a gold macroelectrode or a gold nanoparticle-modified glassy carbon electrode (GCE) based on the underpotential deposition (UPD) of As ad-atoms. The pre-concentration step deposits and accumulates As ad-atoms onto gold and is followed by a potential sweep to strip the ad-atoms with no interference from Cu(II) or Cl- at either electrode. Linear responses were found for the range 0.01 μM to 0.1 μM or 0.005 μM to 0.1 μM at gold macroelectrodes and gold nanoparticle-modified electrodes, respectively. The visually clearly discernable signals recorded at 0.005 μM (0.4 ppb) on gold nanoparticle-modified electrodes suggests that this method has practical value given the WHO limit of 0.13 μM (10 ppb) for drinking water.

AB - We report a new, sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using either a gold macroelectrode or a gold nanoparticle-modified glassy carbon electrode (GCE) based on the underpotential deposition (UPD) of As ad-atoms. The pre-concentration step deposits and accumulates As ad-atoms onto gold and is followed by a potential sweep to strip the ad-atoms with no interference from Cu(II) or Cl- at either electrode. Linear responses were found for the range 0.01 μM to 0.1 μM or 0.005 μM to 0.1 μM at gold macroelectrodes and gold nanoparticle-modified electrodes, respectively. The visually clearly discernable signals recorded at 0.005 μM (0.4 ppb) on gold nanoparticle-modified electrodes suggests that this method has practical value given the WHO limit of 0.13 μM (10 ppb) for drinking water.

KW - Anodic stripping voltammetry

KW - Arsenic

KW - Electroanalysis

KW - Gold nanoparticles

KW - Underpotential deposition

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DO - 10.1016/j.jelechem.2022.116154

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VL - 909

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

M1 - 116154

ER -

Arsenic (III) detection with underpotential deposition on gold

Abstract

Keywords

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