Glassy carbon electrodes modified with gold nanoparticles for the simultaneous determination of three food antioxidants

Lin, Xiaoyun; Ni, Yongnian; Kokot, Serge

doi:10.1016/j.aca.2012.12.036

Cited by 133 publications

(60 citation statements)

References 32 publications

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“…To further validate the performance of the method a number of possible interferences were studied. Thirteen metal and acidic ions previously reported to be common interferences were evaluated (Lin 2013;Sun et al 2015) in the malachite green determination process (1 µM) and no interference was observed for 500- …”

Section: Interference Studiesmentioning

confidence: 99%

Determination of Malachite Green in Aquaculture Water by Adsorptive Stripping Voltammetry

Zhu

Honeychurch

et al. 2015

Analytical Letters

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Section: Interference Studiesmentioning

confidence: 99%

Determination of Malachite Green in Aquaculture Water by Adsorptive Stripping Voltammetry

Zhu

Honeychurch

et al. 2015

Analytical Letters

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“…Gold nanoparticles (AuNPs) have attracted considerable interest because of their unique optical, electronic and catalytic properties [5][6][7][8]. Conducting polymer-gold nanoparticle composites exhibit improved physical and chemical properties over their single-component counterparts and are the focus of intensive research [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behavior of polypyrrol/AuNP composites deposited by different electrochemical methods: sensing properties towards catechol

et al. 2016

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Two different methods were used to obtain polypyrrole/AuNP (Ppy/AuNP) composites. One through the electrooxidation of the pyrrole monomer in the presence of colloidal gold nanoparticles, referred to as trapping method (T), and the second one by electrodeposition of both components from one solution containing the monomer and a gold salt, referred to as cogeneration method (C). In both cases, electrodeposition was carried out through galvanostatic and potentiostatic methods and using platinum (Pt) or stainless steel (SS) as substrates. Scanning electron microscopy (SEM) demonstrated that in all cases gold nanoparticles of similar size were uniformly dispersed in the Ppy matrix. The amount of AuNPs incorporated in the Ppy films was higher when electropolymerization was carried out by chronopotentiometry (CP). Besides, cogeneration method allowed for the incorporation of a higher number of AuNPs than trapping. Impedance experiments demonstrated that the insertion of AuNPs increased the conductivity. As an electrochemical sensor, the Ppy/AuNp deposited on platinum exhibited a strong electrocatalytic activity towards the oxidation of catechol. The effect was higher in films obtained by CP than in films obtained by chronoamperometry (CA). The influence of the method used to introduce the AuNPs (trapping or cogeneration) was not so important. The limits of detection (LOD) were in the range from 10 −5 to 10 −6 mol/L. LODs attained using films deposited on platinum were lower due to a synergy between AuNPs and platinum that facilitates the electron transfer, improving the electrocatalytic properties. Such synergistic effects are not so pronounced on stainless steel, but acceptable LOD are attained with lower price sensors.

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“…Also bisphenol A (BPA) is used to produce epoxy resins and polycarbonates. Therefore, these compounds are typically found in domestic and industrial products, waters, and foods (Rodil et al 2010;Lin et al 2013;Richard Prabakar and Sriman Narayanan 2010;Sun et al 2012). The SPAs provide a high level of protection in maintaining food product quality, but an excess of antioxidants is a health risk (Williams 1994), and SPAs' usage is strictly monitored in most countries.…”

Section: Introductionmentioning

confidence: 99%

Determination of Some Synthetic Phenolic Antioxidants and Bisphenol A in Honey Using Dispersive Liquid–Liquid Microextraction Followed by Gas Chromatography-Flame Ionization Detection

et al. 2015

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In the present study, an extraction, preconcentration, and determination method has been reported for some synthetic phenolic antioxidants and bisphenol A in honey samples using dispersive liquid-liquid microextraction technique followed by gas chromatography-flame ionization detection. The main factors influencing the extraction efficiency including extractive solvent type and volume as well as the volume of dispersive solvent, salt addition, and pH are evaluated in this study. Under the optimum extraction conditions, limits of detection and quantification for all target analytes were obtained in the ranges of 0.4-4.7 and 1.3-14 ng g −1 , respectively. Enrichment factors and extraction recoveries were in the ranges of 144-186 and 72-93 %, respectively. The method precision was evaluated at 100 ng g −1 of each analyte, and the relative standard deviations were found to be less than 7.6 % for intra-day (n=6) and less than 8.3 % for inter-days (n=4). The proposed method has been successfully applied to the analysis of different honey samples and two analytes, butylated hydroxytoluene and butylated hydroxyanisole, were determined at nanogram per gram level in one honey sample.

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Glassy carbon electrodes modified with gold nanoparticles for the simultaneous determination of three food antioxidants

Cited by 133 publications

References 32 publications

Determination of Malachite Green in Aquaculture Water by Adsorptive Stripping Voltammetry

Determination of Malachite Green in Aquaculture Water by Adsorptive Stripping Voltammetry

Electrochemical behavior of polypyrrol/AuNP composites deposited by different electrochemical methods: sensing properties towards catechol

Determination of Some Synthetic Phenolic Antioxidants and Bisphenol A in Honey Using Dispersive Liquid–Liquid Microextraction Followed by Gas Chromatography-Flame Ionization Detection

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