A differential pulse voltammetric method for simultaneous determination of ascorbic acid, dopamine, and uric acid using poly (3-(5-chloro-2-hydroxyphenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid) film modified glassy carbon electrode

Ensafi, Ali A.; Taei, M.; Khayamian, Taghi

doi:10.1016/j.jelechem.2009.06.001

Cited by 187 publications

(70 citation statements)

References 33 publications

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“…Ascorbic acid is widely found in association with various biologically and pharmacologically active substances like acetaminophen [2] and other pharmaceutical products [2][3][4][5]. The determination of AA has been established by such methods as high performance liquid chromatography [6][7][8][9], spectrophotometry [10][11][12], mass spectrometry [13], flow injection [14,15], chemiluminescence [16], and electrochemical methods [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Ascorbic Acid, Acetaminophen, and Tryptophan by Square Wave Voltammetry Using N‐(3,4‐Dihydroxyphenethyl)‐3,5‐Dinitrobenzamide‐Modified Carbon Nanotubes Paste Electrode

2012

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N-(3,4-Dihydroxyphenethyl)-3,5-dinitrobenzamide modified-multiwall carbon nanotubes paste electrode was fabricated and used as an electrocatalyst for the oxidation of ascorbic acid (AA), acetaminophen (AC), and tryptophan (TP) at pH 7.0. In a mixture containing AA, AC, and TP, the separation potentials were large enough to determine those compounds individually and simultaneously. The peak currents obtained were found to be linearly dependent on AA, AC, and TP concentrations in the ranges of 0.03-70, 0.6-452, and 0.7-270 mmol L À1, respectively. The sensor was used for the determination of AC, AC, and TP in different real samples with satisfactory results.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Ascorbic Acid, Acetaminophen, and Tryptophan by Square Wave Voltammetry Using N‐(3,4‐Dihydroxyphenethyl)‐3,5‐Dinitrobenzamide‐Modified Carbon Nanotubes Paste Electrode

2012

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“…21,22 Whereas LD, UA and AA play the main role in the human body and often coexist in biological fluids, the selective detection of these three compounds has always been the subject of many types of research. 15 As LD, UA and AA are all electroactive, electrochemical methods are often utilized to the determination of these three species. 23,24 However, the direct redox reactions of these species at the bare electrodes take place at very similar potentials [25][26][27][28] and often suffer from a pronounced fouling effect, which results in a poor selectivity and reproducibility.…”

Section: Hatefi-mehrjardi Et Almentioning

confidence: 99%

Poly-Dianix Blue/Multi-Walled Carbon Nanotube Modified Electrode for Detection of Levodopa in the Presence of High Concentrations of Ascorbic and Uric Acids

Hatefi-Mehrjardi¹,

Karimi²,

Barani³

et al. 2017

ACSi

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A selective and sensitive electrochemical sensor was studied for determination of levodopa (LD) in the presence of uric acid (UA) and ascorbic acid (AA) using poly-dianix blue and multi-walled carbon nanotubes (PDB/MWCNTs) modified glassy carbon electrode. Cyclic voltammetry, differential pulse voltammetry, and chronoamperometry methods were applied to investigate the electrocatalytic oxidation of LD, UA and AA in aqueous solutions. By DPV technique, LD, UA and AA give oxidation peaks at 0.380, 0.520 and 0.180 V, respectively. Under the optimized experimental conditions LD, UA and AA give a linear response in the range of 0.09-75 μmol L -1 , 0.3-110 μmol L -1 and 10-160 μmol L -1 , respectively. Accordingly, the obtained detection limits were 0.003, 0.002 and 0.023 μmol L -1 . The method provides a simple electrochemical sensor for successful determination of LD in human blood serum samples.

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“…Furthermore, they can provide a suitable microenvironment for the immobilization of biomolecules, and act as mediators. 11,35,36 Poly(3,4-ethylenedioxythiophene) (PEDOT), due to its high conductivity, good stability in both aqueous and nonaqueous forms, low interface impedance, reduced band-gap and environment-friendly features has received great interest in recent years. 37 40 Besides the above advantages, the super biocompatibility and low Young's modulus also results in its wide application in preparation the modified electrodes and electrochemical sensing systems.…”

Section: Introductionmentioning

confidence: 99%

Amperometric Determination of Ascorbic Acid on an Au Electrode Modified by a Composite Film of Poly(3,4-ethylenedioxythiophene) and Superconductive Carbon Black

Zhou

et al. 2015

ANAL. SCI.

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A new composite film-modified electrode was prepared by the electropolymerisation of poly(3,4-ethylenedioxythiophene) (PEDOT) and superconductive carbon black (SCB) on a gold electrode. The PEDOT-SCB/Au electrode exhibited excellent ability towards the electrocatalytic oxidation of ascorbic acid, in terms of a 480 mV shift of the oxidation potential in the negative direction, and a dramatically enhanced oxidation current. Under the optimum conditions, the amperometric detection of ascorbic acid provided a wide linear detection range from 1.0 × 10 -7 to 8.0 × 10 -4 M, and a detection limit of 5.0 × 10 -8 M (S/N = 2) as well as good reproducibility and stability.

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A differential pulse voltammetric method for simultaneous determination of ascorbic acid, dopamine, and uric acid using poly (3-(5-chloro-2-hydroxyphenylazo)-4,5-dihydroxynaphthalene-2,7-disulfonic acid) film modified glassy carbon electrode

Cited by 187 publications

References 33 publications

Simultaneous Determination of Ascorbic Acid, Acetaminophen, and Tryptophan by Square Wave Voltammetry Using N‐(3,4‐Dihydroxyphenethyl)‐3,5‐Dinitrobenzamide‐Modified Carbon Nanotubes Paste Electrode

Simultaneous Determination of Ascorbic Acid, Acetaminophen, and Tryptophan by Square Wave Voltammetry Using N‐(3,4‐Dihydroxyphenethyl)‐3,5‐Dinitrobenzamide‐Modified Carbon Nanotubes Paste Electrode

Poly-Dianix Blue/Multi-Walled Carbon Nanotube Modified Electrode for Detection of Levodopa in the Presence of High Concentrations of Ascorbic and Uric Acids

Amperometric Determination of Ascorbic Acid on an Au Electrode Modified by a Composite Film of Poly(3,4-ethylenedioxythiophene) and Superconductive Carbon Black

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