Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12313/524
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
Authors: Nagles, Edgar
Ibarra, Laura
Penagos-Llanos, Johisner
Hurtado, John
García-Beltrán, Olimpo
Keywords: Dopamine
Human urine
Cobalt(II) complex
Stripping voltammetry
Issue Date: 1-Feb-2017
Publisher: Journal of Electroanalytical Chemistry
Citation: Nagles, E., Ibarra, L., Llanos, J. P., Hurtado, J., & Garcia-Beltrán, O. (2017). 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. Journal of Electroanalytical Chemistry, 788, 38–43.
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%.
URI: https://onlinelibrary.wiley.com/doi/abs/10.1002/elan.201600729
ISSN: 1572-6657
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