Electrochemical Sensing of Uric Acid Using Glassy Carbon Modified with Multiwall Carbon Nanotubes Dispersed in Polyethylenimine

Gutiérrez, Alejandro García; Lozano, Maria L.; Galicia, Laura; Ferreyra, Nancy F.; Rivas, Gustavo A.

doi:10.1002/elan.201400287

Cited by 16 publications

(6 citation statements)

References 53 publications

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“…Moreover, these peak currents for AA and DA have few fluctuations in the measurements, showing that the oxidation process of AA, DA and UA by the MWCNTs@PFFP modified electrodes is independent without interference from each other, which is the foundation of simultaneous detection of AA, DA and UA. The selectivity of the modified electrode sensors for AA, DA and UA is superior to that reported in references [2,54].…”

Section: Response Of Mwcnts@pffp Modified Electrodescontrasting

confidence: 61%

Novel electrochemical sensors from poly[N-(ferrocenyl formacyl) pyrrole]@multi-walled carbon nanotubes nanocomposites for simultaneous determination of ascorbic acid, dopamine and uric acid

Zhang

et al. 2019

Nanotechnology

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Novel multi-walled carbon nanotubes coated with poly[N-(ferrocenyl formacyl) pyrrole] (MWCNTs@PFFP) nanocomposites were prepared through the in situ oxidation polymerization reaction of N-(ferrocenyl formacyl) pyrrole in the presence of MWCNTs. The MWCNTs@PFFP nanocomposites were characterized by FT-IR, Raman, TGA, XRD, XPS, SEM and TEM techniques. The MWCNTs@PFFP nanocomposites were fabricated into novel electrochemical sensors for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). The electrochemical behavior of the MWCNTs@PFFP/GCE sensors was examined, and the parameters that influence electrochemical signals were optimized. The experimental results showed that the fabricated modified electrode sensors exhibited good sensitivity, selectivity, specificity, repeatability and a long lifetime, remaining the initial current of at least 92.5% after 15 days storage in air. The sensors possessed a linear response concentration range over 200–400 μM for AA, 2–16 μM for both DA and UA, and a limit of detection as low as 40.0, 1.1 and 7.3 × 10−1 μM for AA, DA and UA, respectively. They are expected to be used as a potential tool for the simultaneous detection of DA, AA and UA in the human body.

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Section: Response Of Mwcnts@pffp Modified Electrodescontrasting

confidence: 61%

Novel electrochemical sensors from poly[N-(ferrocenyl formacyl) pyrrole]@multi-walled carbon nanotubes nanocomposites for simultaneous determination of ascorbic acid, dopamine and uric acid

Zhang

et al. 2019

Nanotechnology

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“…Many analytical methods have been developed to detect H 2 O 2 , such as chemiluminescence, spectrophotometry, titrimetry and electrochemical method. Among them, non-enzymatic electrochemical sensors are attracted much attention due to its advantages of low-cost, simplicity, high sensitivity and high selectivity [ 29 , 30 , 31 ]. The standard reduction potential for the reaction of H 2 O 2 is 1.77 V, and AuNPs, as a typical noble metal NPs, has been reported to exhibit good catalytic activity toward the reduction of H 2 O 2 [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Gold Nanoparticles with Alginate and Its Catalytic Activity for Reduction of 4-Nitrophenol and H2O2 Detection

Zhao

Deng

et al. 2017

Materials

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Gold nanoparticles (AuNPs) were synthesized using a facile solvothermal method with alginate sodium as both reductant and stabilizer. Formation of AuNPs was confirmed by UV-vis spectroscopic analysis. The synthesized AuNPs showed a localized surface plasmon resonance at approximately 520–560 nm. The AuNPs were characterized using transmission electron microscopy, X-ray diffraction and dynamic light scattering. Transmission electron microscopy revealed that the AuNPs were mostly nanometer-sized spherical particles. Powder X-ray diffraction analysis proved the formation of face-centered cubic structure of Au. Catalytic reduction of 4-nitrophenol was monitored via spectrophotometry using AuNPs as catalyst, and further a non-enzymatic sensor was fabricated. The results demonstrated that AuNPs presented excellent catalytic activity and provided a sensitive response to H2O2 detection.

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“…Table 2 displays the most significant analytical parameters of other methodologies for the quantification of Do based on CNTs recently reported. Our sensor presents lower detection limit than most of the proposed strategies 37–42 and a slightly higher compared to GCE modified with PCTA and ionic liquid 43 and a combination of nanomaterials (CNTs and AuNP).…”

Section: Resultsmentioning

confidence: 83%

Electrochemical Sensor for the Quantification of Dopamine Using Glassy Carbon Electrodes Modified with Single‐Wall Carbon Nanotubes Covalently Functionalized with Polylysine

Gutiérrez¹,

Gasnier²,

Pedano³

et al. 2015

Electroanalysis

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We report a dopamine electrochemical sensor based on the modification of glassy carbon electrodes (GCE) with polylysine‐functionalized single‐wall carbon nanotubes (SWCNT‐PLys). The resulting electrodes (GCE/SWCNT‐PLys) showed a significant improvement in the electrooxidation of dopamine with drastic decrease in the peak potentials separation and important enhancement in the associated currents. Dopamine was detected by differential pulse voltammetry‐adsorptive stripping with medium exchange at nanomolar levels even in the presence of high excess of ascorbic and uric acids. The sensor was successfully used for the quantification of dopamine in urine samples enriched with the neurotransmitter.

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Electrochemical Sensing of Uric Acid Using Glassy Carbon Modified with Multiwall Carbon Nanotubes Dispersed in Polyethylenimine

Cited by 16 publications

References 53 publications

Novel electrochemical sensors from poly[N-(ferrocenyl formacyl) pyrrole]@multi-walled carbon nanotubes nanocomposites for simultaneous determination of ascorbic acid, dopamine and uric acid

Novel electrochemical sensors from poly[N-(ferrocenyl formacyl) pyrrole]@multi-walled carbon nanotubes nanocomposites for simultaneous determination of ascorbic acid, dopamine and uric acid

Facile Synthesis of Gold Nanoparticles with Alginate and Its Catalytic Activity for Reduction of 4-Nitrophenol and H2O2 Detection

Electrochemical Sensor for the Quantification of Dopamine Using Glassy Carbon Electrodes Modified with Single‐Wall Carbon Nanotubes Covalently Functionalized with Polylysine

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