Simultaneous electrochemical determination of dopamine and acetaminophen using multiwall carbon nanotubes modified glassy carbon electrode

ALOthman, Zeid A.; Bukhari, Nausheen; Wabaidur, Saikh Mohammad; Haider, Sajjad

doi:10.1016/j.snb.2010.02.024

Cited by 287 publications

(102 citation statements)

References 43 publications

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“…These effects have mainly been attributed to their great surfaces for adsorption, an improvement in electron transfer and the presence of impurities such as Fe, among others. In this context, many works related to CNT-based electrochemical sensors for bioanalytical applications have been published, finding use in clinical chemistry, food quality and control, drug analysis, waste water treatment and bioprocessing [3][4][5] . Despite all of the electroanalytical advantages from CNTs, a major experimental drawback is their insolubility in all solvents, which makes their use as surface electrode modifiers difficult.…”

Section: Introductionmentioning

confidence: 99%

Electrooxidation of Dna at Glassy Carbon Electrodes Modified With Multi-Walled Carbon Nanotubes With Different Oxidation Degree

Cañete-Rosales

Álvarez‐Lueje

Bollo

2014

J. Chil. Chem. Soc.

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For the first time, the study of the effect of length and degree of oxidation of multi-walled carbon nanotubes (CNTs) on the electroanalytical DNA sensing properties of modified glassy carbon electrodes (GCEs) is reported. GCE/CNT electrodes were prepared using chitosan (CHI) as a dispersing agent. Short (S-NCs) and long (L-NCs) carbon nanotubes, as well as unoxidized and 3 or 6 hour oxidized samples were used. Cyclic voltammetry indicated that S-NCs exhibited larger capacitance values than L-NCs, and that these values increased when the CNTs were oxidized. Using Scanning Electrochemical Microscopy (SECM), an increase in the surface homogeneity was determined when oxidized CNTs were used as electrode modifiers. dsDNA electrooxidation showed the highest response using GCEs/CHI-L-NCs, and a clear decrease in the current intensity was observed when the oxidation time was increased. This result correlates with the higher BET surface area of L-NCs. In conclusion, the electrochemical performance of GCE/CNT electrodes against DNA increase when the length of CNTs is higher and decrease at higher oxidation state.

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Section: Introductionmentioning

confidence: 99%

Electrooxidation of Dna at Glassy Carbon Electrodes Modified With Multi-Walled Carbon Nanotubes With Different Oxidation Degree

Cañete-Rosales

Álvarez‐Lueje

Bollo

2014

J. Chil. Chem. Soc.

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“…It was easily seen that the R ct of these electrodes was in a sequence of: bare GCE < En/PGA/GCE < PGA/GCE < DNA/En/PGA/ GCE ( Figure 2, curve a-d). This is because the positive charge of amino group on the En/PGA/GCE surface was benefit for Fe(CN) 6 3À/4À anions enrichment. It was easier for electron transfer compared to the PGA/GCE, which was negatively charged on the surface.…”

mentioning

confidence: 99%

Sensitive and Selective Detection of Dopamine Using a DNA Immobilized Ethylenedidamine/Polyglutamic Modified Electrode

Zou

Luo

et al. 2011

Electroanalysis

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DNA was attached on the surface of an ethylenedidamine/polyglutamic(En/PGA) modified glassy carbon electrode (GCE) to create a novel voltammetric sensor (DNA/En/PGA/GCE) for dopamine (DA). This modified electrode exhibited a linear voltammetric response for DA in the range from 1.0 10 À7 mol L À1 to 1 10 À5 mol L À1 , with a detection limit of 2 10 À8 mol L À1. The detection of DA was found to be unaffected by the presence of ascorbic acid, uric acid, serotonin and folic acid. The method proposed was applied to detect DA in pharmaceutical dosage and human blood serum with good satisfactory results.

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“…(1) was used for such voltammograms whose ∆Ep values are greater than 10 mV [42][43][44][45][46][47][48][49] ∆Ep=201.39 log (υ/k 0 ) -301.78…”

Section: Effect Of Pa and Fa Sweep Rate At Poly (Eosin) Modified Cpementioning

confidence: 99%

Electrochemical Studies of Paracetamoland Folic Acid in the Presence of Epinephrineat Poly (Eosin) Modified Electrode: A Voltammetric Study

Cm¹,

Be²,

Jayadevappa³

2017

J Biosens Bioelectron

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Simultaneous electrochemical determination of dopamine and acetaminophen using multiwall carbon nanotubes modified glassy carbon electrode

Cited by 287 publications

References 43 publications

Electrooxidation of Dna at Glassy Carbon Electrodes Modified With Multi-Walled Carbon Nanotubes With Different Oxidation Degree

Electrooxidation of Dna at Glassy Carbon Electrodes Modified With Multi-Walled Carbon Nanotubes With Different Oxidation Degree

Sensitive and Selective Detection of Dopamine Using a DNA Immobilized Ethylenedidamine/Polyglutamic Modified Electrode

Electrochemical Studies of Paracetamoland Folic Acid in the Presence of Epinephrineat Poly (Eosin) Modified Electrode: A Voltammetric Study

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