Highly sensitive detection of Cr 6+ on boron doped diamond electrodes

Stéphane Fierro; Takeshi Watanabe; Kazumi Akai; Yasuaki Einaga

doi:10.1016/j.electacta.2012.03.030

Highly sensitive detection of Cr ⁶⁺ on boron doped diamond electrodes

Stéphane Fierro, Takeshi Watanabe, Kazumi Akai, Yasuaki Einaga

Department of Chemistry

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

29 Citations (Scopus)

Abstract

Electrochemical detection of Cr ⁶⁺ has been performed by cyclic and linear scan voltammetry on boron doped diamond (BDD) electrode. This method is based on the electrochemical reduction of Cr ⁶⁺ to Cr ³⁺. The resulting voltammograms exhibited a clear peak at 0.03 V vs. AgCl related to this reduction and highly accurate (r ² = 0.99) calibration curves could be obtained for a chromium concentration range between 10 ppb and 5 ppm. The influence of other metals dissolved in solution (Cu, Cd, Pb, B and Se) has been investigated as well and it was found that the Cr ⁶⁺ calibration curves remained unaltered. For all the experiments performed, a detection limit around 3 ppb was achieved. The high accuracy and reproducibility of the results as well as the excellent stability of the electrode material proves the excellent capabilities of this system for chromium detection.

Original language	English
Pages (from-to)	9-11
Number of pages	3
Journal	Electrochimica Acta
Volume	82
DOIs	https://doi.org/10.1016/j.electacta.2012.03.030
Publication status	Published - 2012 Nov 1

Keywords

Boron doped diamond electrodes
Chromium detection
Cyclic and linear scan voltammetry

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

Access to Document

10.1016/j.electacta.2012.03.030

Cite this

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title = "Highly sensitive detection of Cr 6+ on boron doped diamond electrodes",

abstract = "Electrochemical detection of Cr 6+ has been performed by cyclic and linear scan voltammetry on boron doped diamond (BDD) electrode. This method is based on the electrochemical reduction of Cr 6+ to Cr 3+. The resulting voltammograms exhibited a clear peak at 0.03 V vs. AgCl related to this reduction and highly accurate (r 2 = 0.99) calibration curves could be obtained for a chromium concentration range between 10 ppb and 5 ppm. The influence of other metals dissolved in solution (Cu, Cd, Pb, B and Se) has been investigated as well and it was found that the Cr 6+ calibration curves remained unaltered. For all the experiments performed, a detection limit around 3 ppb was achieved. The high accuracy and reproducibility of the results as well as the excellent stability of the electrode material proves the excellent capabilities of this system for chromium detection.",

keywords = "Boron doped diamond electrodes, Chromium detection, Cyclic and linear scan voltammetry",

author = "St{\'e}phane Fierro and Takeshi Watanabe and Kazumi Akai and Yasuaki Einaga",

note = "Funding Information: St{\'e}phane Fierro gratefully thanks the Fond National Suisse pour la Recherche Scientifique (FNSRS) for the financial support. Furthermore, this work was partly supported by the New Energy and Industrial Technology Development Organization (NEDO) . ",

year = "2012",

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doi = "10.1016/j.electacta.2012.03.030",

language = "English",

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journal = "Electrochimica Acta",

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AU - Fierro, Stéphane

AU - Watanabe, Takeshi

AU - Akai, Kazumi

AU - Einaga, Yasuaki

N1 - Funding Information: Stéphane Fierro gratefully thanks the Fond National Suisse pour la Recherche Scientifique (FNSRS) for the financial support. Furthermore, this work was partly supported by the New Energy and Industrial Technology Development Organization (NEDO) .

PY - 2012/11/1

Y1 - 2012/11/1

N2 - Electrochemical detection of Cr 6+ has been performed by cyclic and linear scan voltammetry on boron doped diamond (BDD) electrode. This method is based on the electrochemical reduction of Cr 6+ to Cr 3+. The resulting voltammograms exhibited a clear peak at 0.03 V vs. AgCl related to this reduction and highly accurate (r 2 = 0.99) calibration curves could be obtained for a chromium concentration range between 10 ppb and 5 ppm. The influence of other metals dissolved in solution (Cu, Cd, Pb, B and Se) has been investigated as well and it was found that the Cr 6+ calibration curves remained unaltered. For all the experiments performed, a detection limit around 3 ppb was achieved. The high accuracy and reproducibility of the results as well as the excellent stability of the electrode material proves the excellent capabilities of this system for chromium detection.

AB - Electrochemical detection of Cr 6+ has been performed by cyclic and linear scan voltammetry on boron doped diamond (BDD) electrode. This method is based on the electrochemical reduction of Cr 6+ to Cr 3+. The resulting voltammograms exhibited a clear peak at 0.03 V vs. AgCl related to this reduction and highly accurate (r 2 = 0.99) calibration curves could be obtained for a chromium concentration range between 10 ppb and 5 ppm. The influence of other metals dissolved in solution (Cu, Cd, Pb, B and Se) has been investigated as well and it was found that the Cr 6+ calibration curves remained unaltered. For all the experiments performed, a detection limit around 3 ppb was achieved. The high accuracy and reproducibility of the results as well as the excellent stability of the electrode material proves the excellent capabilities of this system for chromium detection.

KW - Boron doped diamond electrodes

KW - Chromium detection

KW - Cyclic and linear scan voltammetry

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