Amperometric xanthine biosensors based on chitosan-Co3O4-multiwall carbon nanotube modified glassy carbon electrode

Dalkıran, Berna; Kaçar, Ceren; Erden, Pınar Esra; Kılıç, Esma

doi:10.1016/j.snb.2014.04.025

Cited by 70 publications

(26 citation statements)

References 41 publications

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“…with CH, a decrease is observed in the peak current (curve a); leading to the conclusion that CH is acting as an inert blocking layer making the electron transfer more difficult. CH is known to have a relatively poor conductivity and some decrease in the peak current has also been reported previously [14]. GC coated with a layer of GR produce a CV (curve c), with a remarkable enhancement in the peak currents compared to those with unmodified GC and CH/GC.…”

Section: Surface Morphologies Of Composite Electrodessupporting

confidence: 74%

Construction of an Electrochemical Xanthine Biosensor Based on Graphene/Cobalt Oxide Nanoparticles/Chitosan Composite for Fish Freshness Detection

Dalkıran¹,

Erden²,

Kılıç³

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Abstract:A xanthine biosensor based on glassy carbon electrode (GC) modified with graphene (GR), Co3O4 nanoparticles, and chitosan (CH) composite was fabricated. Xanthine oxidase (XAO) solution was dropped on the surface of Nafion/Co3O4/CH/GR/GC and the electrode was placed in saturated glutaraldehyde vapor for the crosslinking of the enzymes. The modified electrode was characterized by scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimized experimental conditions, xanthine was detected in the concentration range from 5.0×10 -4 to 8.0×10-2 mM with a detection limit of 2.0×10 -4 mM. The low Michaelis-Menten constant (0.17 mM) suggested enhanced enzymic affinity for the immobilized enzyme as compared to previously reported xanthine biosensors. Moreover, the biosensor exhibited some advantages, such as short response time (10 s), high sensitivity (6.58 μA/mM or 74.8 µA/mMcm 2 ), and good reproducibility (RSD = 1.2%). The suitability of the device was verified by xanthine assay in a fish meat sample. The biosensor provided to be a reliable, easy, fast and economical method for the evaluation of fish freshness.

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Section: Surface Morphologies Of Composite Electrodessupporting

confidence: 74%

Construction of an Electrochemical Xanthine Biosensor Based on Graphene/Cobalt Oxide Nanoparticles/Chitosan Composite for Fish Freshness Detection

Dalkıran¹,

Erden²,

Kılıç³

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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“…mesoporous silica [36] and the β-cyclodextrin-modified glassy carbon electrode [37]. Furthermore, the detection limit is lower than XOx/Nano-CaCO 3 [35], mesoporous silica [36], and XO/HRP/Co 3 O 4 /MWCNTs/CS/GCE [38].…”

Section: The Effect Of Phmentioning

confidence: 99%

One-pot synthesis of an RGO/ZnO nanocomposite on zinc foil and its excellent performance for the nonenzymatic sensing of xanthine

Zhang

Dong

Qian

et al. 2015

Sensors and Actuators B: Chemical

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“…The use of metal and metal oxide nanoparticles was reported to improve the performance characteristics of the electrochemical methods. [17][18][19] Among different nanomaterials, the zinc oxide (ZnO) nanoparticles possess an important place due to their unique properties such as high specific surface area, optical transparency, high catalytic efficiency, strong adsorption ability, bio-compatibility, nontoxicity, chemical stability, ease of fabrication, fast electron transfer kinetics and electrochemical activities. 20,21 The use of ZnO nanoparticles in carbon paste electrodes is a promising approach to enhance the performance of electrochemical methods.…”

Section: Electroanalytical Characterization Of Montelukast Sodium Andmentioning

confidence: 99%

Electroanalytical Characterization of Montelukast Sodium and Its Voltammetric Determination in Pharmaceutical Dosage Form and Biological Fluids

Çölkesen¹,

Öztürk²,

Erden³

2015

Journal of the Brazilian Chemical Society

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The electrochemical properties of montelukast sodium (MKST) at zinc oxide nanoparticles modified carbon paste electrode were investigated by cyclic voltammetry and square wave voltammetry. All studies were based on the irreversible and adsorption-controlled electrochemical reduction signal of montelukast sodium at about -0.7 vs. Ag/AgCl at pH 2.3 in methanol-Britton-Robinson buffer mixture. This adsorptive character of the molecule was used to develop a novel, validated, rapid, selective and simple square wave cathodic adsorptive stripping voltammeric method for the direct determination of montelukast sodium in pharmaceutical and biological fluids without time-consuming steps prior to drug assay. Peak current of electrochemical reduction of montelukast sodium was found to vary linearly with the concentration in the range from 1.0 × 10 -8 to 1.28 × 10 -6 mol L -1 . In this method, limit of detection was found to be 7.7 × 10 -9 mol L -1 . The method was applied to determine the content of MKST tablet and spiked human serum.

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Amperometric xanthine biosensors based on chitosan-Co3O4-multiwall carbon nanotube modified glassy carbon electrode

Cited by 70 publications

References 41 publications

Construction of an Electrochemical Xanthine Biosensor Based on Graphene/Cobalt Oxide Nanoparticles/Chitosan Composite for Fish Freshness Detection

Construction of an Electrochemical Xanthine Biosensor Based on Graphene/Cobalt Oxide Nanoparticles/Chitosan Composite for Fish Freshness Detection

One-pot synthesis of an RGO/ZnO nanocomposite on zinc foil and its excellent performance for the nonenzymatic sensing of xanthine

Electroanalytical Characterization of Montelukast Sodium and Its Voltammetric Determination in Pharmaceutical Dosage Form and Biological Fluids

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