Modified gold electrodes based on thiocytosine/guanine-gold nanoparticles for uric and ascorbic acid determination

Vulcu, Adriana; Berghian‐Grosan, Camelia; Mureşan, Liana Maria; Pruneanu, Stela; Olenic, Liliana

doi:10.1016/j.electacta.2012.10.074

Cited by 23 publications

(12 citation statements)

References 27 publications

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“…This work demonstrates the construction of a glassy carbon electrode chemically modified with carbon nanotubes and 1‐benzyl‐4‐ferrocenyl‐1H‐‐triazole (BFT). This modified electrode was used for electrocatalytic determination of hydrazine.…”

Section: Discussionmentioning

confidence: 99%

“…The chemical modifications of bare electrodes with a thin film of a suitable electroactive species offer significant advantages in the design and development of electrochemical sensors and biosensors …”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we describe the preparation and suitability of a 1‐benzyl‐4‐ferrocenyl‐1 H ‐‐triazole (BFT)/carbon nanotube modified glassy carbon electrode (BFT‐CNT‐GCE) as a new electrode for the electrocatalysis and determination of hydrazine in an aqueous buffer solution. Then, in order to demonstrate the catalytic potential of this modified electrode for electro‐oxidation of hydrazine in real samples, we have examined this method for the voltammetric determination of hydrazine in some water samples.…”

Section: Introductionmentioning

confidence: 99%

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Application of a 1‐benzyl‐4‐ferrocenyl‐1H‐[1,2,3]‐triazole/carbon nanotube modified glassy carbon electrode for voltammetric determination of hydrazine in water samples

Beitollahi

Tajik

Maleh

et al. 2013

Applied Organom Chemis

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The electrochemical behaviour of hydrazine at a 1-benzyl-4-ferrocenyl-1H-[1,2,3]-triazole-triazole/carbon nanotube modified glassy carbon electrode has been studied. The modified electrode shows an excellent electrocatalytic activity for the oxidation of hydrazine and accelerates electron transfer rate. The electrocatalytic current increases linearly with hydrazine concentration in the range 0.5-700.0 mM and the detection limit for hydrazine was 33.0 AE 2.0 nM. The diffusion coefficient (D = 2.5 AE 0.1 Â 10 À5 cm 2 s À1 ) and kinetic parameters such as the electron transfer coefficient, (a = 0.52) and the heterogeneous rate constant (k 0 = 5.5 AE 0.1 Â 10 À3 cm s À1 ) for hydrazine were determined using electrochemical approaches. Finally, the method was employed for the determination of hydrazine in water samples.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of a 1‐benzyl‐4‐ferrocenyl‐1H‐[1,2,3]‐triazole/carbon nanotube modified glassy carbon electrode for voltammetric determination of hydrazine in water samples

Beitollahi

Tajik

Maleh

et al. 2013

Applied Organom Chemis

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“…However, the electrochemical oxidation of AA and co-existing electroactive components such as Uric Acid (UA) and Dopamine (DA) results in highly overlapping peaks, leading to poor reproducibility and low selectivity. Thus, the selective detection of AA in the presence of the other two species or their simultaneous determination has been a major goal of much research [18][19][20][21][22][23][24].…”

mentioning

confidence: 99%

A Dense Manganese Porphyrin-Nanobar Random Arrays: Direct and Electrocatalytic Oxidation of Ascorbic Acid in the Presence of Dopamine and Uric Acid

Shamsipur¹,

Hashem²,

Pashabadi³

2017

Int J Nanoparticles Nanotech

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Microelectrode arrays demonstrated an attractive behavior relate to macroelectrodes, as they can produce voltammetric responses of similar magnitude to their macro counterparts, but with a considerably less capacitive/background current. Hence, they have found an increasing use in electroanalytical sensing devices. Recently, some researches were focused on designing new types of sensing-arrays that employed micro/nanoelectrodes in both regular and random distributions [1,2]. These structures, due to their many advantageous properties, including low background charging currents, large current density related to convergent diffusion and importantly small diffu

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“…However, detection of these species in physiological samples is challenging because of the high concentrations of ascorbic acid (0.2-0.5 mM) accompanied with small concentrations of DA (10 −8 to 10 −7 M) in physiological samples [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous electrochemical determination of dopamine, uric acid and ascorbic acid using silver nanoparticles deposited on polypyrrole nanofibers

Ghanbari

Hajheidari

2015

J Polym Res

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Silver nanoparticles modified polypyrrole (PPy) nanofibers were fabricated and used for the simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA) with good selectivity and high sensitivity. Polypyrrole nanofibers were prepared through electrodeposition, while silver nanoparticles were deposited on PPy nanofiber by electrodeposition and electrochemical oxidation in situ. The morphology and structure of silver nanoparticles/polypyrrole nanocomposite (Ag/PPy) were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared (FT-IR). Compared with the bare glassy carbon electrode (GCE) and PPy/GCE, Ag/PPy modified GCE (AgPPy/GCE) exhibited much higher electrocatalytic activities toward oxidation of AA, DA, and UA with increasing the peak currents and decreasing the oxidation overpotentials. Cyclic voltammetry (CV) results showed that DA, AA, and UA could be detected selectively and sensitively at Ag-PPy/GCE with peak-to-peak separation of 120 mV and 170 mV for AA-DA and DA-UA, respectively. The calibration curves for AA, DA, and UAwere obtained in the range of 10-580 μM, 0.5-155 μM and 2-100 μM, respectively. The lowest detection limits (S/N= 3) were 1.8 μM, 0.1 μM, and 0.5 μM for AA, DA, and UA, respectively. With good selectivity and sensitivity, the present method was applied to determination of DA in injectable medicine and UA in urine sample.

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Modified gold electrodes based on thiocytosine/guanine-gold nanoparticles for uric and ascorbic acid determination

Cited by 23 publications

References 27 publications

Application of a 1‐benzyl‐4‐ferrocenyl‐1H‐[1,2,3]‐triazole/carbon nanotube modified glassy carbon electrode for voltammetric determination of hydrazine in water samples

Application of a 1‐benzyl‐4‐ferrocenyl‐1H‐[1,2,3]‐triazole/carbon nanotube modified glassy carbon electrode for voltammetric determination of hydrazine in water samples

A Dense Manganese Porphyrin-Nanobar Random Arrays: Direct and Electrocatalytic Oxidation of Ascorbic Acid in the Presence of Dopamine and Uric Acid

Simultaneous electrochemical determination of dopamine, uric acid and ascorbic acid using silver nanoparticles deposited on polypyrrole nanofibers

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