Electrochemical application of cobalt nanoparticles-polypyrrole composite modified electrode for the determination of phoxim

This paper describes the two-step synthesis of a nitrogen-doped reduced graphene oxide–ZnO (N-doped RGO–ZnO) nanocomposite and its photo electrochemical application.

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Differential Pulse Voltammetric Determination of Piroxicam on Lanthanide Ferric Oxide Nanoparticles-Carbon Paste Modified Electrode

Current Pharmaceutical Analysis ◽

10.2174/1573412913666170410131223 ◽

2018 ◽

Vol 14 (3) ◽

pp. 271-276 ◽

Cited By ~ 5

Author(s):

Isaac Yves Lopes de Macedo ◽

Morgana Fernandes Alecrim ◽

Luane Ferreira Garcia ◽

Aparecido Ribeiro de Souza ◽

Wallans Torres Pio dos Santos ◽

...

Keyword(s):

Modified Electrode ◽

Ferric Oxide ◽

Differential Pulse ◽

Voltammetric Determination ◽

Oxide Nanoparticles ◽

Carbon Paste ◽

Carbon Paste Modified Electrode

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Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

Journal of Analytical Methods in Chemistry ◽

10.1155/2014/984314 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

Gen Liu ◽

Wei Ma ◽

Yan Luo ◽

Deng-ming Sun ◽

Shuang Shao

Keyword(s):

Methylene Blue ◽

Uric Acid ◽

Graphene Oxide ◽

Composite Film ◽

Simultaneous Determination ◽

Reduced Graphene Oxide ◽

Modified Electrode ◽

Reduced Graphene ◽

Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

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Development of an Electrochemical Biosensor for Determination of Dopamine by Gold Modified Poly(thiophene-3-boronic acid)- Polyphenol Oxidase Modified Electrode

Materials Letters ◽

10.1016/j.matlet.2021.130387 ◽

2021 ◽

pp. 130387

Author(s):

Venkatesan Sethuraman ◽

T.M. Sridhar ◽

Raman Sasikumar

Keyword(s):

Modified Electrode ◽

Polyphenol Oxidase ◽

Boronic Acid ◽

Electrochemical Biosensor

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Determination of kojic acid based on the interface enhancement effects of carbon nanotube/alizarin red S modified electrode

Colloids and Surfaces B Biointerfaces ◽

10.1016/j.colsurfb.2008.12.003 ◽

2009 ◽

Vol 70 (1) ◽

pp. 20-24 ◽

Cited By ~ 28

Author(s):

Jieshu Liu ◽

Dazhai Zhou ◽

Xiaopeng Liu ◽

Kangbing Wu ◽

Chidan Wan

Keyword(s):

Carbon Nanotube ◽

Modified Electrode ◽

Kojic Acid ◽

Alizarin Red S ◽

Alizarin Red

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Square-wave voltammetric determination of rutin in pharmaceutical formulations using a carbon composite electrode modified with copper (II) phosphate immobilized in polyester resin

Brazilian Journal of Pharmaceutical Sciences ◽

10.1590/s1984-82502012000400007 ◽

2012 ◽

Vol 48 (4) ◽

pp. 639-649 ◽

Cited By ~ 9

Author(s):

Kellen Heloizy Garcia Freitas ◽

Orlando Fatibello-Filho ◽

Ivanildo Luiz de Mattos

Keyword(s):

Modified Electrode ◽

Composite Electrode ◽

Polyester Resin ◽

Pharmaceutical Formulations ◽

Carbon Composite ◽

X Ray ◽

Square Wave ◽

Wave Voltammetry ◽

Carbon Composite Electrode

A carbon composite electrode modified with copper (II) phosphate immobilized in a polyester resin (Cu3(PO4)2-Poly) for the determination of rutin in pharmaceutical samples by square-wave voltammetry is described herein. The modified electrode allows the determination of rutin at a potential (0.20 V vs. Ag/AgCl (3.0 mol L-1 KCl)) lower than that observed at an unmodified electrode. The peak current was found to be linear to the rutin concentration in the range from 9.9 × 10-8 to 2.5 × 10-6 mol L-1, with a detection limit of 1.2×10-8 mol L-1. The response of the electrode was stable, with no variation in baseline levels within several hours of continuous operation. The surface morphology of the modified electrode was characterized by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) system. The results obtained are precise and accurate. In addition, these results are in agreement with those obtained by the chromatographic method at a 95% confidence level.

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