Development of a novel electrochemical sensor based on cobalt(II) complex useful in the detection of dopamine in presence of ascorbic acid and uric acid

Edgar Nagles; Laura Ibarra; Johisner Penagos Llanos; John Hurtado; Olimpo Garcia-Beltrán

doi:10.1016/j.jelechem.2017.01.057

Development of a novel electrochemical sensor based on cobalt(II) complex useful in the detection of dopamine in presence of ascorbic acid and uric acid

Edgar Nagles, Laura Ibarra, Johisner Penagos Llanos, John Hurtado, Olimpo Garcia-Beltrán

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

30 Scopus citations

Abstract

[(Co(bdmpzm)₂(NCS)₂] (bdmpzm = bis(3,5-dimethylpyrazol-1-yl)methane) was synthesized and combined with single walled carbon nanotubes (SWCNT) and nafion on a screen printed carbon electrode (SPCE). The electrocatalytic activity of modified electrode (Nafion-SWCNT-[Co(bdmpzm)₂(NCS)₂]/SPCE) was evaluated for dopamine (DA) oxidation. Anodic and cathodic peak were seen to 0.42 V.and0.29 V respectively, showed a much more quasi-reversible process, (∆ V 0.128) compared with the electrode without cobalt complex. The detection limit (3σ/b) for dopamine was 0.095 μmol L^− 1. The studies of reproducibility determined as relative standard deviation (RSD) was 2.5%.(n = 5) with four different electrodes. The repeatability were 1.5% (n = 5) The new sensor was used in the quantify DA in human urine with an average recovery between 83.0 and 93.0%.

Original language	English
Pages (from-to)	38-43
Number of pages	6
Journal	Journal of Electroanalytical Chemistry
Volume	788
DOIs	https://doi.org/10.1016/j.jelechem.2017.01.057
State	Published - 1 Mar 2017

Bibliographical note

Funding Information:
E. N and O. G thank to the financial support by the Universidad de Ibagué (15-376-INT) is gratefully acknowledged. J.H and L.I thank the Department of Chemistry and the School of Science of the Universidad de los Andes for the financial support.

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Cobalt(II) complex
Dopamine
Human urine
Strippingvoltammetry

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10.1016/j.jelechem.2017.01.057

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title = "Development of a novel electrochemical sensor based on cobalt(II) complex useful in the detection of dopamine in presence of ascorbic acid and uric acid",

abstract = "[(Co(bdmpzm)2(NCS)2] (bdmpzm = bis(3,5-dimethylpyrazol-1-yl)methane) was synthesized and combined with single walled carbon nanotubes (SWCNT) and nafion on a screen printed carbon electrode (SPCE). The electrocatalytic activity of modified electrode (Nafion-SWCNT-[Co(bdmpzm)2(NCS)2]/SPCE) was evaluated for dopamine (DA) oxidation. Anodic and cathodic peak were seen to 0.42 V.and0.29 V respectively, showed a much more quasi-reversible process, (∆ V 0.128) compared with the electrode without cobalt complex. The detection limit (3σ/b) for dopamine was 0.095 μmol L− 1. The studies of reproducibility determined as relative standard deviation (RSD) was 2.5%.(n = 5) with four different electrodes. The repeatability were 1.5% (n = 5) The new sensor was used in the quantify DA in human urine with an average recovery between 83.0 and 93.0%.",

keywords = "Cobalt(II) complex, Dopamine, Human urine, Strippingvoltammetry",

author = "Edgar Nagles and Laura Ibarra and Llanos, {Johisner Penagos} and John Hurtado and Olimpo Garcia-Beltr{\'a}n",

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doi = "10.1016/j.jelechem.2017.01.057",

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AU - Nagles, Edgar

AU - Ibarra, Laura

AU - Llanos, Johisner Penagos

AU - Hurtado, John

AU - Garcia-Beltrán, Olimpo

PY - 2017/3/1

Y1 - 2017/3/1

N2 - [(Co(bdmpzm)2(NCS)2] (bdmpzm = bis(3,5-dimethylpyrazol-1-yl)methane) was synthesized and combined with single walled carbon nanotubes (SWCNT) and nafion on a screen printed carbon electrode (SPCE). The electrocatalytic activity of modified electrode (Nafion-SWCNT-[Co(bdmpzm)2(NCS)2]/SPCE) was evaluated for dopamine (DA) oxidation. Anodic and cathodic peak were seen to 0.42 V.and0.29 V respectively, showed a much more quasi-reversible process, (∆ V 0.128) compared with the electrode without cobalt complex. The detection limit (3σ/b) for dopamine was 0.095 μmol L− 1. The studies of reproducibility determined as relative standard deviation (RSD) was 2.5%.(n = 5) with four different electrodes. The repeatability were 1.5% (n = 5) The new sensor was used in the quantify DA in human urine with an average recovery between 83.0 and 93.0%.

AB - [(Co(bdmpzm)2(NCS)2] (bdmpzm = bis(3,5-dimethylpyrazol-1-yl)methane) was synthesized and combined with single walled carbon nanotubes (SWCNT) and nafion on a screen printed carbon electrode (SPCE). The electrocatalytic activity of modified electrode (Nafion-SWCNT-[Co(bdmpzm)2(NCS)2]/SPCE) was evaluated for dopamine (DA) oxidation. Anodic and cathodic peak were seen to 0.42 V.and0.29 V respectively, showed a much more quasi-reversible process, (∆ V 0.128) compared with the electrode without cobalt complex. The detection limit (3σ/b) for dopamine was 0.095 μmol L− 1. The studies of reproducibility determined as relative standard deviation (RSD) was 2.5%.(n = 5) with four different electrodes. The repeatability were 1.5% (n = 5) The new sensor was used in the quantify DA in human urine with an average recovery between 83.0 and 93.0%.

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Development of a novel electrochemical sensor based on cobalt(II) complex useful in the detection of dopamine in presence of ascorbic acid and uric acid

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