Simultaneous detection of dopamine, ascorbic acid, and uric acid at electrochemically pretreated carbon nanotube biosensors

Alwarappan, Subbiah; Liu, Guodong; Li, Chen-Zhong

doi:10.1016/j.nano.2009.06.003

Cited by 88 publications

(45 citation statements)

References 29 publications

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“…CNT hybrids have successfully been employed as sensors utilizing electrochemical, electric (ohmic), and optical detection techniques, [12][13][14][15] they have also been invariably examined as active layers element in solar cell [16][17][18] and in magnetic devices.…”

Section: -11mentioning

confidence: 99%

Hybrid materials of pyrene substituted phthalocyanines with single-walled carbon nanotubes: structure and sensing properties

et al. 2015

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Section: -11mentioning

confidence: 99%

Hybrid materials of pyrene substituted phthalocyanines with single-walled carbon nanotubes: structure and sensing properties

et al. 2015

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“…The most popular strategies include polymer, self-assembled monolayer, metal nanoparticle, carbon nanotube and surfactant modified electrodes [9][10][11][12][13]. In particular, there has been much interest in the development of sensors based on electrodes modified with polymeric films.…”

Section: Introductionmentioning

confidence: 99%

The selective detection of dopamine at a polypyrrole film doped with sulfonated β-cyclodextrins

Harley

Rooney

Breslin

2010

Sensors and Actuators B: Chemical

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a b s t r a c t A highly selective dopamine sensor was fabricated by doping polypyrrole with a sulfonated ␤-cyclodextrin. This composite material enabled the selective sensing of dopamine in the presence of a large excess of ascorbic acid and prevented the regeneration of dopamine through the homogeneous catalytic reaction of the ascorbate anion with the dopamine-o-quinone. A single redox wave, corresponding to the oxidation of dopamine, was observed in dopamine/ascorbate mixtures, giving a truly selective dopamine sensor. The limit of detection was measured as 3.2 × 10 −6 M for dopamine.

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“…Although these modified electrodes have shown improved sensitivity and selectivity compared with the conventional electrode, the using of GC and CPE has the limitation of time-consuming for cleaning, polishing, and low reproducibility. In addition, the immobilized layers were prone to surface deactivation due to solvent evaporation, and they decay with time, resulting in nonuniform thickness and poor reproducibility [16]. It will be not suitable for practical use.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Dopamine in the Presence of Ascorbic Acid and Uric Acid by Electrochemically Oxidized Screen Printed Carbon Electrode

Viết¹

2018

JST

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This research reported the simple method to determine of dopamine (DA) in the simultaneous presence of ascorbic acid (AA) and uric acid (UA). Three -electrode system manufactured by screen printing method was used due to its disposal and low cost. The screen printed carbon electrode (SPCE) was oxidized by electrochemical technique in acid medium. The capacity of oxidized electrode for selective detection of dopamine was confirmed in a sufficient amount of ascorbic acid and uric acid. The large separated peaks of DA from ascorbic acid and uric acid are observed. The peak separation between UA and DA, DA and AA was 110 mV and 160 mV, respectively. The bare SPCE cannot determine simultaneously AA and DA due to the overlap peaks of AA and DA around 0.2 V vs AgCl/Ag. This sensor also exhibited good sensitivity to DA with limit of detection 100 nM in phosphate buffer solution.

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Simultaneous detection of dopamine, ascorbic acid, and uric acid at electrochemically pretreated carbon nanotube biosensors

Cited by 88 publications

References 29 publications

Hybrid materials of pyrene substituted phthalocyanines with single-walled carbon nanotubes: structure and sensing properties

Hybrid materials of pyrene substituted phthalocyanines with single-walled carbon nanotubes: structure and sensing properties

The selective detection of dopamine at a polypyrrole film doped with sulfonated β-cyclodextrins

Simultaneous Determination of Dopamine in the Presence of Ascorbic Acid and Uric Acid by Electrochemically Oxidized Screen Printed Carbon Electrode

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