Electrocatalytic determination of Cd 2+ and Pb 2+ using an l -cysteine tungstophosphate self-assembled monolayer on a polycrystalline gold electrode

In this study, a novel sensitive surface based on an l -cysteine tungstophosphate-modified polycrystalline gold electrode (Au-(Cys)PW) was developed for the electrochemical detection of Cd 2+ and Pb 2+ in trace amounts. The electrocatalytic effect of this modified electrode toward Cd 2+ and Pb 2+ wa...

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Published inNew journal of chemistry Vol. 43; no. 36; pp. 14417 - 14425
Main Authors Dianat, Somayeh, Hatefi-Mehrjardi, Abdolhamid, Mahmoodzadeh, Kourosh, Kakhki, Somayeh
Format Journal Article
LanguageEnglish
Published 16.09.2019
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Abstract In this study, a novel sensitive surface based on an l -cysteine tungstophosphate-modified polycrystalline gold electrode (Au-(Cys)PW) was developed for the electrochemical detection of Cd 2+ and Pb 2+ in trace amounts. The electrocatalytic effect of this modified electrode toward Cd 2+ and Pb 2+ was evaluated by square wave voltammetry (SWV) as a sensitive method in the presence of the two analytes with bare and Au-(Cys)PW electrodes. The experimental conditions were optimized in order to evaluate the best analytical parameters of the sensor. A linear range of 0.01–0.2 μmol L −1 for both analytes and detection limits of 9.0 nmol L −1 and 4.0 nmol L −1 for Cd 2+ and Pb 2+ , respectively, were determined based on a signal-to-noise ratio (S/N) equal to 3. Reproducibility and repeatability studies were also performed, and the Au-(Cys)PW electrode was employed for the determination of Cd 2+ or Pb 2+ in an industrial wastewater sample, which revealed the potential application of the modified electrode.
AbstractList In this study, a novel sensitive surface based on an l -cysteine tungstophosphate-modified polycrystalline gold electrode (Au-(Cys)PW) was developed for the electrochemical detection of Cd 2+ and Pb 2+ in trace amounts. The electrocatalytic effect of this modified electrode toward Cd 2+ and Pb 2+ was evaluated by square wave voltammetry (SWV) as a sensitive method in the presence of the two analytes with bare and Au-(Cys)PW electrodes. The experimental conditions were optimized in order to evaluate the best analytical parameters of the sensor. A linear range of 0.01–0.2 μmol L −1 for both analytes and detection limits of 9.0 nmol L −1 and 4.0 nmol L −1 for Cd 2+ and Pb 2+ , respectively, were determined based on a signal-to-noise ratio (S/N) equal to 3. Reproducibility and repeatability studies were also performed, and the Au-(Cys)PW electrode was employed for the determination of Cd 2+ or Pb 2+ in an industrial wastewater sample, which revealed the potential application of the modified electrode.
Author Kakhki, Somayeh
Dianat, Somayeh
Hatefi-Mehrjardi, Abdolhamid
Mahmoodzadeh, Kourosh
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Snippet In this study, a novel sensitive surface based on an l -cysteine tungstophosphate-modified polycrystalline gold electrode (Au-(Cys)PW) was developed for the...
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Title Electrocatalytic determination of Cd 2+ and Pb 2+ using an l -cysteine tungstophosphate self-assembled monolayer on a polycrystalline gold electrode
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