Voltammetric determination of ascorbic acid and dopamine in the same sample at the surface of a carbon paste electrode modified with polypyrrole/ferrocyanide films

Raoof, Jahan Bakhsh; Ojani, Reza; Rashid-Nadimi, Sahar

doi:10.1016/j.electacta.2005.03.002

Cited by 145 publications

(57 citation statements)

References 24 publications

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“…[1][2] The ability of the conductive/electroactive polymers such as polypyrrole, poly(1-naphthylamine), poly(ortho-toluidine) etc., for the fabrication of the modified electrodes prepared by an electropolymerization procedure have been demonstrated. [3][4][5][6][7] On the other hand, nitrite ion (NO 2 -) has been reported as a human health -hazard which extensively exists in the environment and usually uses in food preservation against food poisoning microorganism such as clostridium botulinum. 8 The surplus of nitrite would cause carcinogens because it is an essential precursor in the formation of Nnitrosamines.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Efficient Electrochemical Sensor for Electrocatalytic Reduction of Nitrite Based on Poly(4‐aminoacetanilide) Film Using Carbon Paste Electrode

Ojani

Raoof

Rahemi

2011

J Chinese Chemical Soc

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In this study, the electrochemical reduction of nitrite was investigated on poly(4-aminoacetanilide) (PPAA) forming by cyclic voltammetry at the surface of carbon paste electrode. The electrochemical properties of the modified electrode have been studied by cyclic voltammetry and double potential step chronoamperometry. Results showed that in the optimum condition (pH = 0.00) the reduction of nitrite occurred at a potential about 667 mV more positive than that unmodified carbon paste electrode. This amount of electrocatalytic ability is high compared with other electrocatalysts. Using a chronoamperometric method, the catalytic rate constant (k) was calculated 8.4 × 10 4 cm 3 mol -1 s -1 . Also, the electrocatalytic reduction peak currents was found to be linear with the nitrite concentration in the ranges of 5 × 10 -4 M to 2.5 × 10 -2 M and 2 × 10 -5 M to 7 × 10 -3 M with detection limits (2s) were determined as 4.5 × 10 -4 M and 1 × 10 -5 M by cyclic voltammetry (CV) and hydrodynamic amperometry methods respectively. Recovery experiments exhibit the satisfactory results.

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Section: Introductionmentioning

confidence: 99%

A Simple and Efficient Electrochemical Sensor for Electrocatalytic Reduction of Nitrite Based on Poly(4‐aminoacetanilide) Film Using Carbon Paste Electrode

Ojani

Raoof

Rahemi

2011

J Chinese Chemical Soc

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“…Di antara jenis-jenis polimer konduktor, polipirol telah digunakan untuk memodifikasi elektroda karena polipirol memiliki konduktivitas listrik yang tinggi, mudah disintesis dalam pelarut air dan ketebalan film dapat dikendalikan dengan proses elektropolimerisasi (Kamalzadeh and Shahrokhian, 2014). Elektroda yang dimodifikasi dengan polipirol telah diaplikasikan untuk pengukuran asam askorbat (Raoof et al, 2005), atorvastatin (Kamalzadeh and Shahrokhian, 2014) dan epinefrin (Shahrokhian and Saberi, 2011).Dalam penelitian ini, screen printed carbon electrode (SPCE) yang dimodifikasi dengan polipirol secara elektropolimerisasi digunakan untuk analisis hidrokuinon (H 2 Q).…”

Section: Pendahuluanunclassified

Modification of Screen Printed Carbon Electrodeby Polypyrrole for Determination of Hydroquinone

2016

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Electropolymerization of polypyrrole for determination of hydroquinone on screen printed carbon electrode (SPCE) was performed using cyclic voltammetry. Electropolymerization of polypyrrole on SPCE begins with determining the optimum conditions of cyclic voltammetry (working potential, scan rate, number of cycles) and the conditions of solution (pyrrole and KCl concentrations).The working potential were varied at 0 – 0.8; 0 – 0.9; 0 – 1 V. The variation of scan rate were 50, 100, 150 mV/s and number of cycleswere 5, 10,15 cycles. The influence of pyrrole concentration was studied by providing variation of 5, 50, 100 mM. Meanwhile, the KCl concentration were at 0.1; 0.5; 1 M. The SPCE modified with polypyrrole was washed with deionized water and was dried at room temperature. The prepared polypyrrole was analyzed and based on the high anodic and cathodic peak current of the hydroquinone, it is confirmed that the preparation was succefully conducted. The optimum conditions on electropolymerization of polypyrrole areat the working potential of 0 – 0.9 V; the scan rate 100 of mV/s; the number of cyclesis 10, and at thepyrroleconcentration of 50 mM and KCl concentration of 0.5 M. SPCE modified polypyrrole can determine the hydroquinone at the concentration range of 5 – 100 μM with the sensitivity of 0.120 μA/Μm and the detection limit (S/N = 3) of 0.8 μM.

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“…This gives rise to overlapping oxidation peaks that are difficult to resolve [2,3]. In an attempt to resolve the oxidation peaks of DA and AA, various modified electrodes have been proposed and reported [4][5][6]. However, few of these have met with sufficient success to enable the development of a selective dopamine sensor.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensing of Dopamine Using a Dodecylsulfate Doped Polypyrrole Film

Moorhead

Breslin

2012

ECS Trans.

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A polymer-modified electrode was fabricated by the electropolymerisation of pyrrole from an ethanol solution using sodium dodecylsulfate as a dopant. The modified electrode is a highly sensitive electrochemical sensor for dopamine with a limit of detection measured as 3.8 x 10-8 mol dm-3. The sensor did not sense the common interferant ascorbic acid showing a single redox peak for dopamine in the presence of excess ascorbic acid.

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Voltammetric determination of ascorbic acid and dopamine in the same sample at the surface of a carbon paste electrode modified with polypyrrole/ferrocyanide films

Cited by 145 publications

References 24 publications

A Simple and Efficient Electrochemical Sensor for Electrocatalytic Reduction of Nitrite Based on Poly(4‐aminoacetanilide) Film Using Carbon Paste Electrode

A Simple and Efficient Electrochemical Sensor for Electrocatalytic Reduction of Nitrite Based on Poly(4‐aminoacetanilide) Film Using Carbon Paste Electrode

Modification of Screen Printed Carbon Electrodeby Polypyrrole for Determination of Hydroquinone

Electrochemical Sensing of Dopamine Using a Dodecylsulfate Doped Polypyrrole Film

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