Construction of a modified carbon paste electrode based on TiO2 nanoparticles for the determination of gallic acid

Tashkhourian, Javad; Ana, Sayedeh Fatemeh Nami; Hashemnia, Sedigheh; Hormozi-Nezhad, M. Reza

doi:10.1007/s10008-012-1860-y

Cited by 59 publications

(33 citation statements)

References 51 publications

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“…The direct oxidation of polyphenols such as gallic acid at an unmodified electrode could offers some problem for analytical application due to slow electrode kinetics and relative high overpotentials required for redox reactions of gallic acid 32. By other side, redox mediators have been widely used in order to decrease the overpotential and increase the kinetics of electron transfer.…”

Section: Resultsmentioning

confidence: 99%

A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo‐Complex

et al. 2015

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A simple and fast method based on electrochemical measurements was proposed for estimation of total polyphenols using a carbon paste modified electrode. The method was based on catalytic response exhibited by a ruthenium complex [(bpy)2(NH3)RuIII(µ‐O)RuIII(NH3)(bpy)2]4+ in presence of gallic acid (GA). Calibration plots using chronoamperometry (CA) showed a linear response for GA concentrations ranging from 6.6×10−6 to 1.9×10−4 mol L−1 with a detection limit of 4.9×10−7 mol L−1. Comparative studies using the official method revealed a good agreement between methods suggesting that the proposed method can be applied for polyphenol estimation without any sample treatment.

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Section: Resultsmentioning

confidence: 99%

A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo‐Complex

et al. 2015

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“…Graphene was from Acros Organics, K 4 [Fe(CN) 6 ] and Na 2 HPO 4 were from Merck specialties Pvt. Ltd, Mumbai and K 3 [Fe(CN) 6 ], NaH 2 PO 4 were from Fisher Scientific India Pvt. Ltd. Pomegranate juice, grape juice, green tea and red wines were collected from local super markets.…”

Section: Methodsmentioning

confidence: 99%

“…The electrochemical reduction and oxidation behavior of 1mM K 3 [Fe(CN) 6 ] in 0.1 M KCl at bare GCE, graphene/GCE and MWCNT/graphene/GCE was studied by using cyclic voltammetry. Figure 2 (A) shows the CVs of 1 mM K 3 [Fe(CN) 6 ] at various combinations of electrode modification, such as bare GCE (a) MWCNT/GCE (b), graphene/GCE (c), graphene/MWCNT/GCE (d) and MWCNT/graphene/GCE (e). At bare GCE the peak currents were less and after the modification with graphene, the peak currents increased, which was due to conductive nature of graphene suspended on the surface of GCE.…”

Section: Voltammetric Characterization Of Electrodes With K 3 [Fe(cn)mentioning

confidence: 99%

“…[2] Gallic acid (GA) is one of the major phenolic compounds found in a variety of foods and herbs that are well known as a powerful antioxidant. [3][4][5] Foods and herbs such as blueberries, walnuts, apples, pomegranate, green tea, black tea and wine products contains GA. [6][7][8][9][10][11] GA is also found in gall nuts, sumac, witch hazel, watercress, oak bark, and a variety of other plants and herbs. GA was shown to prevent cellular mutations and toxic to the cancer cells, having no negative effect on the healthy cells.…”

Section: Introductionmentioning

confidence: 99%

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Development, Characterization and Application of a Carbon‐Based Nanomaterial Composite as an Electrochemical Sensor for Monitoring Natural Antioxidant (Gallic Acid) in Beverages

2017

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Gallic acid (GA) is an important organic acid, found in many natural plants and in food beverages. Here in, we have developed a chemical sensor for the monitoring of GA in wine, green tea and fruit juices. The oxidation of GA was found to be an irreversible process and the corresponding mechanism was proposed. The effect of pH on the oxidation behavior was studied and pH‐6.0 was selected as an optimum pH. Based on the scan rate results a linear relation was observed between the square root of scan rate and peak currents for GA, confirming the oxidation of GA as a diffusion controlled process. The kinetic parameters such as diffusion coefficient, heterogeneous rate constant and charge transfer coefficient values were determined. The limit of detection (LOD) and quantification (LOQ) values were calculated as 4.39 × 10‐7 M and 1.46 × 10‐6 M. The repeatability, reproducibility and stability of the developed sensor were examined and the results confirmed that the developed sensor was in superior in condition. Finally, the practical application of the developed sensor was scrutinized for the quantitative estimation of GA in wine, green tea and fruit juices.

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“…The modified electrode has good electrocatalytic activity, sensitivity, and selectivity; it has also a low detection limit compared to traditional carbon paste electrodes [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Preparation, characterization and electrochemical application of Ag–ZnO nanoplates for voltammetric determination of glutathione and tryptophan using modified carbon paste electrode

Beitollahi

Gholami

2015

Materials Science and Engineering: C

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Construction of a modified carbon paste electrode based on TiO2 nanoparticles for the determination of gallic acid

Cited by 59 publications

References 51 publications

A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo‐Complex

A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo‐Complex

Development, Characterization and Application of a Carbon‐Based Nanomaterial Composite as an Electrochemical Sensor for Monitoring Natural Antioxidant (Gallic Acid) in Beverages

Preparation, characterization and electrochemical application of Ag–ZnO nanoplates for voltammetric determination of glutathione and tryptophan using modified carbon paste electrode

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