Electrochemical behavior of tryptophan and its derivatives at a glassy carbon electrode modified with hemin

Nan, Chen Guo; Zhao, Feng; Li, Wang Xiu; Ping, Duan Jian; Qin, Chen

doi:10.1016/s0003-2670(01)01470-2

Cited by 105 publications

(37 citation statements)

References 9 publications

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“…The other electroactive biomolecules which coexist with Trp in biological matrices interfere with the determination of Trp due to their similar oxidation peak potentials. These problems are solved by modifying the electrodes with suitable materials using various modi ication methods [18]. Many materials have been used to modify the traditional working electrodes for the determination of Trp [19].…”

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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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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“…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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“…To date, several techniques have been reported for the determination of Trp in various samples. Some of these techniques are liquid chromatography 27 , spectrophotometric procedures 28 and capillary electrophoresis 29,30 , but electrochemical methods have the advantages of high sensitivity, low cost and simple instruments, for determination of Trp 31 . 4-Chlorocatechol has been used as an electron transfer mediator in electrochemical processes due to their high electron transfer efficiency, excellent redox reversibility and low cost [32][33][34] .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Voltammetric Determination of N-Acetyl-L-Cysteine, Uric Acid and Tryptophan at Surface of Glassy Carbon Electrode in the Present of 4-Chlorocatechol as a Homogeneous Electrochemical Catalyst

Jahanshahi

Raoof

Amiri-Aref

et al. 2014

J. Chil. Chem. Soc.

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Simultaneous determination of N-acetyl-L-cysteine (NAC), uric acid (UA) and tryptophan (Trp) has been studied at the surface of glassy carbon electrode (GCE) in the present of 4-chlorocatechol as a homogenous electrochemical catalyst in aqueous media. The electrocatalytic properties of GCE in the present of 4-chlorocatechol toward the electrocatalytic oxidation of NAC, UA and Trp was studied using cyclic voltammetry (CV), double-step potential chronoamperometry and differential pulse voltammetry (DPV). The results show that NAC participates in the reaction with electrogenerated quinone from electrooxidation of 4-chlorocatechol at surface of GCE to form the corresponding thioquinone derivative. The reoxidation of the adduct leads to increase in the oxidative current which is proportional to the concentration of NAC. Differential pulse voltammogram peak currents of NAC, UA and Trp increased linearly with their concentrations in the ranges of 5.0 -45.0 µM, 10.0 -50.0 µM and 5.0 -55.0 µM, respectively and the detection limits for NAC, UA and Trp were sequentially 3.55 µM, 6.96 µM and 4.41 µM. The proposed method was employed for simultaneous determination of NAC, UA and Trp in the pharmaceutical and biological samples and the obtained results were found to be satisfactory.

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Electrochemical behavior of tryptophan and its derivatives at a glassy carbon electrode modified with hemin

Cited by 105 publications

References 9 publications

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

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

Simultaneous Voltammetric Determination of N-Acetyl-L-Cysteine, Uric Acid and Tryptophan at Surface of Glassy Carbon Electrode in the Present of 4-Chlorocatechol as a Homogeneous Electrochemical Catalyst

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