Electrochemical Determination of Phenolic Acids at a Zn/Al Layered Double Hydroxide Film Modified Glassy Carbon Electrode

Kahl, Michael; Golden, Teresa D.

doi:10.1002/elan.201400156

Cited by 54 publications

(19 citation statements)

References 50 publications

(60 reference statements)

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“…The oxidation that occurs at the first peak is because of the oxidation of the galloyl group, as can be seen in Fig. 4, which then leads to the second peak that is assumed to have been developed from the third -OH group in the galloyl moiety of the compound [14,28,29]. This assumption is reinforced by the fact that the electrooxidation of the carboxylic group (-COOH) occurs at 2.0 V and produces CO 2 [12].…”

Section: Electrochemical Behaviour Of Gallic Acid At the Nano-go-sio mentioning

confidence: 93%

The synergistic effect between graphene oxide nanocolloids and silicon dioxide nanoparticles for gallic acid sensing

Chikere

Faisal

Lin

et al. 2019

J Solid State Electrochem

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For the first time, the synergistic effect of graphene oxide nanocolloids (nano-GO) and silicon dioxide (silica) nanoparticles (SiO 2-nanoparicles) has been used to modify a glassy carbon electrode (GCE) for the determination of gallic acid (GA). The modified electrode surface was characterised by using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXA) and Fourier transform infrared spectroscopy (FTIR). The electrochemical behaviour of the modified electrode was then studied, using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), showing that the electrode was sensitive to GA in a concentration range of 6.25 × 10 −6 to 1.0 × 10 −3 mol L −1 , with a correlation coefficient R 2 of 0.9956 and a limit of detection of 2.09 × 10 −6 mol L −1 (S/N = 3). The proposed method was successfully used for the determination of GA in red wine, white wine and orange juice, with recoveries of 102.3, 95.4 and 97.6%, respectively.

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Section: Electrochemical Behaviour Of Gallic Acid At the Nano-go-sio mentioning

confidence: 93%

The synergistic effect between graphene oxide nanocolloids and silicon dioxide nanoparticles for gallic acid sensing

Chikere

Faisal

Lin

et al. 2019

J Solid State Electrochem

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show abstract

“…However, because low kinetics and high over potentials are necessary to oxidize GA, direct oxidation on the surface of the bare electrode is not efficient. 17,18 In addition, recent suggested uses of GA for applications beyond the food sector (e.g., medical, biomedical, and pharmaceutical applications) have imposed the necessity for electrochemical sensors with enhanced selectivity, sensitivity and limit of detection. To this scope, physicochemical modications on the electrode surface have demonstrated to be the most promising strategy.…”

Section: Introductionmentioning

confidence: 99%

Development of an electrochemical nanosensor for the determination of gallic acid in food

et al. 2016

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In the present work, a silver nanoparticle/delphinidin modified glassy carbon electrode (AgNP/Delph/GCE) was fabricated as a highly sensitive electrochemical sensor for gallic acid (GA) determination. Cyclic voltammetry experiments indicated a higher sensitivity and better selectivity for gallic acid when using the AgNP/Delph/GCE as compared with the bare GCE surface, which were attributed to AgNPs and delphinidin, respectively. Moreover, the calculated surface electron transfer rate constant (k s ), and the electron transfer coefficient (a) between the GCE and the electrodeposited delphinidin demonstrated that delphinidin is an excellent electron transfer mediator for the electrocatalytic process. The average catalytic rate constant (k 0 ) of the overall process was also estimated to be 7.40 Â 10 À4 cm s À1 for the AgNP/Delph/GCE in the presence of 1.50 mmol L À1 of GA. Amperometry experiments were used to determine the limit of detection of the AgNP/Delph/GCE electrochemical sensor, which was 0.28 mmol GA. The activity of the modified electrode was eventually investigated to assess the potential quantification of GA in real foods.

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“…[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%

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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Electrochemical Determination of Phenolic Acids at a Zn/Al Layered Double Hydroxide Film Modified Glassy Carbon Electrode

Cited by 54 publications

References 50 publications

The synergistic effect between graphene oxide nanocolloids and silicon dioxide nanoparticles for gallic acid sensing

The synergistic effect between graphene oxide nanocolloids and silicon dioxide nanoparticles for gallic acid sensing

Development of an electrochemical nanosensor for the determination of gallic acid in food

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

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