Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate

Li, Chunya; Ya, Yu; Zhan, Guoqiang

doi:10.1016/j.colsurfb.2009.11.017

Cited by 84 publications

(57 citation statements)

References 22 publications

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“…Incorporation of metal nanoparticles on the surface of electrodes has been suggested in order to enhance the electron transfer rate. Thus metal nanoparticle-modified electrodes are used increasingly in the determination of Trp [31][32][33]. The electrocatalytic oxidation of glutathione and Trp is individually and simultaneously investigated at the sur-face of modified carbon paste electrode by incorporating TiO 2 nanoparticles and ferrocene carboxylic acid [34].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of Tryptophan at Gold Nanoparticle‐Modified Carbon Ionic Liquid Electrode

Safavi

Momeni

2010

Electroanalysis

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The electrochemical behavior of tryptophan was studied at the carbon ionic liquid electrode (CILE) modified with gold nanoparticle (GNP). This electrode has a stable and excellent response toward tryptophan. Under optimum experimental conditions, the calibration curve was linear in the tryptophan concentration range of 5 to 900 mM with an excellent correlation coefficient (0.995). The experimental limit of detection was 4 mM. Contrary to many other electrodes, the oxidation of tryptophan on GNP/CILE does not result in electrode fouling. GNP/CILE has been effectively applied to the determination of tryptophan in composite amino acid injection.

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Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of Tryptophan at Gold Nanoparticle‐Modified Carbon Ionic Liquid Electrode

Safavi

Momeni

2010

Electroanalysis

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“…According to Bard and Faulkner [23], current-potential characteristic of the oxidation irreversible process is described by the equation 4 [23]: (4). Analytical performance of PDA-β-CD-GCE has been compared with other reported electrodes and the results are shown in Table 1 [27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Resultsmentioning

confidence: 99%

“…as component of dietary protein while it is scarcely present in vegetables. Hence, it has been supplied through food products to avoid its de iciency [3][4][5]. Trp is one of the basic constituents of protein and a requisite in human nutrition to establish and maintain a positive nitrogen balance [6].…”

Section: Introductionmentioning

confidence: 99%

Poly-dopamine-Beta-Cyclodextrin Modified Glassy Carbon Electrode as a Sensor for the Voltammetric Detection of L-Tryptophan at Physiological pH

Hasanzadeh¹

2017

J Forensic Sci Res

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The main purpose of this report was to develop application of poly-dopamine-beta-cyclodextrin modifi ed glassy carbon electrode (PDA-β-CD-GCE) towards electrooxidation and determination of L-Tryptophan (L-Trp) and also the evaluation its kinetic parameters. In continuation of our efforts to use PDA-β-CD-GCE for amino acids detection, our objective in the present work was to expand application of this sensor for the determination of L-Trp which is very sensitive.

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“…However, electrochemical method for monitoring trp has shown promise compared to the methods above. It is well known that the electrochemical detection of trp at the unmodified electrode is not optimal owing to sluggish electron transfer processes and high over-potential [65]; so, lots of efforts have been contributed to seek the new material for electrode modification in order to promote the electron transfer and reduce the over-potential [66][67][68][69][70][71][72][73][74][75][76][77][78].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of tryptophan at room-temperature ionic liquid-titanium carbide nanoparticle gel modified electrode

Zhang

Pan

et al. 2014

Ionics

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The novel gel composite, based on the ground o f i o n i c l i q u i d ( 1 -b u t y l -3 -m e t h y l i m i d a z o l i u m hexafluorophosphate, BMIMPF 6 ) and titanium carbide (TiC) nanoparticles, was used to modify glassy carbon electrode and applied to the electrochemical determination of tryptophan (trp). The physical and electrochemical characterizations of the BMIMPF 6 -TiC gel modified electrode were studied in detail by scanning electron microscopy, energy dispersive X-ray spectroscopy, cyclic voltammetry, and differential pulse voltammetry methods. Due to the large specific surface area and strong adsorption property of TiC nanoparticles, as well as the good ionic conductivity and strong electrocatalytic property of BMIMPF 6 , the oxidation peak current of trp at BMIMPF 6 -TiC gel modified electrode showed good linear relation with its concentrations ranging from 0.50 to 30 μmol/L and 30 to 500 μmol/L, respectively. The detection limit was 0.053 μmol/L. More importantly, the BMIMPF 6 -TiC gel modified electrode had good antiinterference ability and can be successfully applied in the electrochemical determination of trp in real food samples.

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Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate

Cited by 84 publications

References 22 publications

Electrocatalytic Oxidation of Tryptophan at Gold Nanoparticle‐Modified Carbon Ionic Liquid Electrode

Electrocatalytic Oxidation of Tryptophan at Gold Nanoparticle‐Modified Carbon Ionic Liquid Electrode

Poly-dopamine-Beta-Cyclodextrin Modified Glassy Carbon Electrode as a Sensor for the Voltammetric Detection of L-Tryptophan at Physiological pH

Electrochemical determination of tryptophan at room-temperature ionic liquid-titanium carbide nanoparticle gel modified electrode

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