Electrochemical and catalytic investigations of dopamine and uric acid by modified carbon nanotube paste electrode

Mazloum-Ardakani, Mohammad; Beitollahi, Hadi; Ganjipour, Bahram; Naeimi, Hossein; Nejati, Maryam

doi:10.1016/j.bioelechem.2008.11.006

Cited by 157 publications

(76 citation statements)

References 39 publications

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“…Beitollahi et al utilized a 2,2 -[1,2-ethanediylbis (nitriloethylidyne)]-bis-hydroquinone (EBNBH) modified CNT paste electrode (CNT-CPE) to determine dopamine and uric acid [29]. The EBNBH modified CNT-CPE exhibited selectivity and sensitivity (0.1375 A M −1 ) for dopamine in the presence of uric acid.…”

Section: Carbon Nanotube Paste Electrodesmentioning

confidence: 98%

Review: Carbon nanotube based electrochemical sensors for biomolecules

Jacobs

Peairs

Venton

2010

Analytica Chimica Acta

914

451

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Section: Carbon Nanotube Paste Electrodesmentioning

confidence: 98%

Review: Carbon nanotube based electrochemical sensors for biomolecules

Jacobs

Peairs

Venton

2010

Analytica Chimica Acta

914

451

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“…Furthermore, the addition of MWCNTs to the modified electrode increases the peak current (Figure 4e). ) for the chemical reaction between captopril and the redox sites in ADAFCNTE, k h , can be evaluated by chronoamperometry according to the method described in [15][16]:…”

Section: Results and Descussionmentioning

confidence: 99%

Application of new ferrocene derivative for electrocatalytic determination of captopril using multiwall carbon nanotube modified carbon paste electrode

Taei¹,

Hasanpour²,

Zahedi³

2015

Bull. Chem. Soc. Eth.

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ABSTRACT.A carbon-paste electrode modified with the N-4,4'-azodianiline (ferrocenyl Schiff base) and with multiwall carbon nanotubes was used as a highly sensitive and fairly selective electrochemical sensor for trace level determination of captopril. This modified electrode shows very efficient electrocatalytic activity for anodic oxidation of captopril via substantially decreasing of anodic overpotential. The measurements carried out by application of electrochemical impedance spectroscopy, differential pulse voltammetry, cyclic voltammetry and chronoamperometry. It has been found that under optimum conditions, the oxidation of captopril occurs at potential less positive than the unmodified carbon paste electrode. The kinetic parameters such as electron transfer coefficient (α) and rate constant for chemical reaction between captopril and redox sites in the modified electrode were 0.31 and 1.82 ×10 2 cm 3 mol -1 s -1 , respectively. The catalytic peak current was linearly dependent on the captopril concentration in the range of 0.1-625.0 µmol L -1 with a detection limit of 0.03 µmol L -1 . Finally, the modified electrode was examined as a selective, simple, and a precise new electrochemical sensor for the determination of captopril in real sample, such as urine, with satisfactory results.

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“…Researchers have extended considerable effort in developing highly sensitive and selective electrochemical neurotransmitter sensors for early diagnosis of mental diseases. The main issues in the development of electrochemical sensors for neurotransmitters include the enhanced separation between the formal potentials of the neurotransmitters (Alarcón-Angeles et al 2008;Mazloum-Ardakani et al 2009;Wen et al 2009;Zhang et al 2009;Kamyabi et al 2009) and the prevention of the overwhelm signal from interfering agents ).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical selective detection of dopamine on microbial carbohydrate-doped multiwall carbon nanotube-modified electrodes

2009

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Microbial carbohydrate-doped multiwall carbon nanotube (MWNT)-modified electrodes were prepared for the purpose of determining if 4-(2-aminoethyl)benzene-1,2-diol (3,4-dihydroxyphenylalanine; dopamine) exists in the presence of 0.5 mM ascorbic acid, a representative interfering agent in neurotransmitter detection. The microbial carbohydrate dopants were alpha-cyclosophorohexadecaose (alpha-C16) from Xanthomonas oryzae and cyclic-(1 --> 2)-beta-d-glucan (Cys) from Rhizobium meliloti. The cyclic voltammetric responses showed that the highest sensitivity (5.8 x 10(-3) mA cm(-2) microM(-1)) is attained with the Cys-doped MWNT-modified ultra-trace carbon electrode, and that the alpha-C16-doped MWNT-modified glassy carbon electrode displays the best selectivity to dopamine (the approximate peak potential separation is 310 mV).

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Electrochemical and catalytic investigations of dopamine and uric acid by modified carbon nanotube paste electrode

Cited by 157 publications

References 39 publications

Review: Carbon nanotube based electrochemical sensors for biomolecules

Review: Carbon nanotube based electrochemical sensors for biomolecules

Application of new ferrocene derivative for electrocatalytic determination of captopril using multiwall carbon nanotube modified carbon paste electrode

Electrochemical selective detection of dopamine on microbial carbohydrate-doped multiwall carbon nanotube-modified electrodes

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