A multi-walled carbon nanotube/poly-2,6-dichlorophenolindophenol film modified carbon paste electrode for the amperometric determination of <scp>l</scp>-tyrosine

D’Souza, Ozma J.; Mascarenhas, Ronald J.; Satpati, Ashis Kumar; Namboothiri, Irishi N. N.; Detriche, Simon; Mekhalif, Zineb; Delhalle, Joseph

doi:10.1039/c5ra18329d

Cited by 33 publications

(17 citation statements)

References 61 publications

(48 reference statements)

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“…TY (4‐hydroxyphenylalanine) is an amino acid, derived from phenylalanine and indispensable for humans to establish and maintain a correct nitrogen balance . It supports the metabolic activity of different endocrine glands and also acts as a vital precursor for the synthesis of neurotransmitters such as L‐dopa, epinephrine, norepinephrine, serotonin, etc . .…”

Section: Introductionmentioning

confidence: 99%

In situ Electrochemical Synthesis of a Composite Film Containing Nickel Hexacyanoferrate and Bentonite Clay for the Sensitive Determination of Acetaminophen and Dopamine

et al. 2019

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A composite film of nickel hexacyanoferrate (NiHCF) and bentonite (Bt) clay (abbreviated as NiHCF−Bt) is synthesized by an in situ electrochemical method. For this synthesis, nickel ions are immobilized on Bt clay by an ion‐exchange process, equilibrating Bt clay with nickel nitrate. On a glassy carbon electrode (GCE), the nickel ion‐exchanged Bt clay (Ni2+−Bt) is coated to get the modified electrode which is represented as GCE/Ni2+−Bt. The NiHCF−Bt composite film is prepared on the GCE surface using the GCE/Ni2+−Bt and scanning the electrode potentials between −0.10 to 1.00 V continuously in an aqueous solution containing potassium hexacyanoferrate and potassium chloride. This NiHCF−Bt modified GCE (GCE/NiHCF−Bt) exhibits redox peaks due to the oxidation and reduction of the central metal ion, Fe2+. The electro‐generated Fe3+ present in the GCE/NiHCF−Bt, electrocatalytically oxidizes a range of drugs like acetaminophen (AC), dopamine (DA), and tyrosine (TY) at decreased overpotentials with high current. This property is advantageously used for the precise quantification of AC, DA, and TY. Sensitivity, limit of detection, and linear calibration range for the determination of AC are found to be 0.20 μA μM−1 cm−2, 1.5 μM, and 25.0–1000.0 μM, respectively. Further, the amount of AC present in pharmaceutical products is satisfactorily quantified which demonstrated the use of the NiHCF−Bt composite film in electroanalysis.

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Section: Introductionmentioning

confidence: 99%

In situ Electrochemical Synthesis of a Composite Film Containing Nickel Hexacyanoferrate and Bentonite Clay for the Sensitive Determination of Acetaminophen and Dopamine

et al. 2019

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“…Moreover, their high porosity supplies numerous electrochemical active sites that amend their redox events [27,28]. These kinds of electrodes have been used for the designation of many organic and biological molecules [29][30][31][32][33][34][35]. In electrocatalytic studies, the use of CNTs boosts the mass transport and electron-transfer kinetics [36,37].…”

Section: Introductionmentioning

confidence: 99%

A Sensing Platform Using Ag/Pt Core‐shell Nanostructures Supported on Multiwalled Carbon Nanotubes to Detect Hydroxyurea

et al. 2020

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Developing anticancer sensing platforms has a significant impact on individual cancer treatment. Monitoring of anticancer drugs in bodily fluid allows doctors to prescript the efficient amount of drugs that significantly lower chemotherapy side effects on individuals. In this study, for the first time, we explored a chemically modified carbon paste electrode (CPE), containing 2, 2'-(1, 6-hexanediylbisnitrilo-ethylidine)-bis-hydroquinone (HEH) and Ag@Pt/multiwalled carbon nanotubes (MWCNTs), to monitor hydroxyurea (HU), a highly toxic anticancer drug, in human serum. The electrochemical study was carried out to determine the electrocatalytic rate constant, the diffusion coefficient, and the electrontransfer coefficient of HU oxidation. The DPV of HU showed three linear dynamic ranges in the concentration ranges of 0.05 to 1.0 μM, 1.0 to 50.0, and 50.0 to 1000.0 μM. The detection limit was lowered to 23.0 nM. With this sensing platform, DPV peaks of mixed HU and uric acid (UA) could be isolated from each other, indicating satisfied selectivity. The proposed electrochemical sensor serves as a handy device for monitoring of HU in clinical samples.

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“…It is one of the simplest modification methods in terms of ease of preparation of modified electrode . M/MWCNT/MCPE offered the advantages of, improved sensing qualities which contribute to better selectivity, sensitivity as well as properties such as anti‐fouling and anti‐interference . Literature reveals metal oxide nano‐particles (MO‐nps) and their composites are gaining attention as modifiers for their use as electro‐catalysts, because of improved performance in the electrochemical detection of various analyte .…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Study and Rapid Quantification of Resorcinol in Hair Dye and Biological Samples Using Ultrasensitive Maghemite/MWCNT Modified Carbon Paste Electrode

Manasa¹,

Bhakta

Mekhalif

et al. 2019

Electroanalysis

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Increased concern over the risk resorcinol (RS) pose to ecology and humans, led to its position in European Union Category 1 list of endocrine disruptors. Legal measures restricted RS utilization and hence crucial to monitor its levels in the environment. Herein we report development of highly efficient and economically viable electrochemical sensor for quantitative determination of RS based on 77Maghemite/MultiWall Carbon Nanotube (M/MWCNT) modified carbon paste electrode. M/MWCNT was synthesized via strategic IR irradiation for the first time, a promising approach to overcome other complicated chemical routes. Powder X‐ray diffraction (PXRD), Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM) and Energy dispersive X‐ray (EDX) were used for characterization. Using Differential Pulse Voltammetry (DPV), we report the lowest detection limit at 0.02 μM. The potential application of the sensor was accomplished as a result of excellent recoveries made from real samples fortified with RS. Results indicated the proficiency of the sensor reliable for rapid, onsite monitoring of RS water contamination and in biological matrices.

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A multi-walled carbon nanotube/poly-2,6-dichlorophenolindophenol film modified carbon paste electrode for the amperometric determination of l-tyrosine

Abstract: An electrochemically induced oxa-Michael addition reaction for electro-polymerization of 2,6-dichlorophenolindophenol at CPE/MWCNT for the electro-catalytic oxidation of tyrosine.

Cited by 33 publications

References 61 publications

In situ Electrochemical Synthesis of a Composite Film Containing Nickel Hexacyanoferrate and Bentonite Clay for the Sensitive Determination of Acetaminophen and Dopamine

In situ Electrochemical Synthesis of a Composite Film Containing Nickel Hexacyanoferrate and Bentonite Clay for the Sensitive Determination of Acetaminophen and Dopamine

A Sensing Platform Using Ag/Pt Core‐shell Nanostructures Supported on Multiwalled Carbon Nanotubes to Detect Hydroxyurea

Voltammetric Study and Rapid Quantification of Resorcinol in Hair Dye and Biological Samples Using Ultrasensitive Maghemite/MWCNT Modified Carbon Paste Electrode

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