Electrocatalytic determination of Cd and Pb using an -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 in | New journal of chemistry Vol. 43; no. 36; pp. 14417 - 14425 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
16.09.2019
|
Online Access | Get full text |
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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.
Constructing a sensitive electrochemical sensor based on (Cys)PW for Cd
2+
and Pb
2+
detection at the nanomolar level with remarkable selectivity. |
---|---|
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.
Constructing a sensitive electrochemical sensor based on (Cys)PW for Cd
2+
and Pb
2+
detection at the nanomolar level with remarkable selectivity. |
Author | Mahmoodzadeh, Kourosh Kakhki, Somayeh Dianat, Somayeh Hatefi-Mehrjardi, Abdolhamid |
AuthorAffiliation | Department of Chemistry Sirjan Payame Noor University Department of Public Health Torbat Heydariyeh University of Medical Sciences University of Hormozgan Faculty of Sciences Department of Chemistry & Nanoscience and Nanotechnology Research Laboratory (NNRL) Payame Noor University (PNU) |
AuthorAffiliation_xml | – name: Department of Chemistry & Nanoscience and Nanotechnology Research Laboratory (NNRL) – name: Department of Chemistry – name: Faculty of Sciences – name: Department of Public Health – name: University of Hormozgan – name: Sirjan Payame Noor University – name: Torbat Heydariyeh University of Medical Sciences – name: Payame Noor University (PNU) |
Author_xml | – sequence: 1 givenname: Somayeh surname: Dianat fullname: Dianat, Somayeh – sequence: 2 givenname: Abdolhamid surname: Hatefi-Mehrjardi fullname: Hatefi-Mehrjardi, Abdolhamid – sequence: 3 givenname: Kourosh surname: Mahmoodzadeh fullname: Mahmoodzadeh, Kourosh – sequence: 4 givenname: Somayeh surname: Kakhki fullname: Kakhki, Somayeh |
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l
-cysteine tungstophosphate-modified polycrystalline gold electrode (Au-(Cys)PW) was developed for the... |
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