Bismuth/Glassy Carbon Composite Electrode for the Determination of Trace Lead and Cadmium

2019 ◽  
Vol 16 (11) ◽  
pp. 557-565 ◽  
Author(s):  
Gil-Ho Hwang ◽  
Seok-Jun Hong ◽  
Won-kyu Han ◽  
Joon-Shik Park ◽  
Sung-Goon Kang
Keyword(s):  
Glassy Carbon ◽  
Composite Electrode ◽  
Carbon Composite ◽  
Lead And Cadmium ◽  
Carbon Composite Electrode

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

2012 ◽  
Vol 48 (4) ◽  
pp. 639-649 ◽  
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.

scholarly journals Voltammetric Methods in Metallothionein Research

2005 ◽  
Vol 3 (1-2) ◽  
pp. 43-53 ◽  
Author(s):  
Ivana Šestáková ◽  
Tomáš Navrátil
Keyword(s):  
Metal Ion ◽  
Composite Electrode ◽  
Differential Pulse ◽  
Carbon Composite ◽  
Ion Transfer ◽  
Adsorbed State ◽  
Carbon Composite Electrode ◽  
Pulse Voltammetry ◽  
Voltammetric Methods

The application of voltammetric methods using different rates of polarisation on HMDE reveal inert or labile behaviour of Cd- or Zn- complexes in the presence of excessive cadmium or zinc ions in solution. This phenomenon was demonstrated first on the simplest phytochelatin – complex of peptide(γ-Glu-Cys)2Glywith cadmium, later on rabbit liver metallothioneins –Cd7MTin the presence of cadmium andCd5Zn2MTin the presence of zinc. Voltammetric methods can distinguish between labile and inert complexes present simultaneously and therefore could elucidate their role in reactions of metal ion transfer.Another method using different rates of polarisation – elimination voltammetry with linear scan – proved that S-tetracoordinated complexes of Cd(II) or Zn(II) in the above-mentioned metallothioneins on HMDE are reduced in the adsorbed state. This implies the possibility of increasing the sensitivity of identification or determination of the above complexes. On carbon composite electrode, similar behaviour of Cd-complexes as on HMDE was observed using differential pulse voltammetry.

Nickel oxide nanoparticles/ionic liquid crystal modified carbon composite electrode for determination of neurotransmitters and paracetamol

2016 ◽  
Vol 40 (1) ◽  
pp. 662-673 ◽  
Author(s):  
Nada F. Atta ◽  
Asmaa H. Ibrahim ◽  
Ahmed Galal
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Composite Electrode ◽  
Carbon Composite ◽  
Oxide Nanoparticles ◽  
Membrane Structures ◽  
Nickel Oxide Nanoparticles ◽  
Ionic Liquid Crystals ◽  
Carbon Composite Electrode

Ionic liquid crystals mimic the natural bio-based ionic liquid crystals such as cell membrane structures in their interactions with drugs.

Development of a Novel Carbon Composite Electrode for Trace Determination of Heavy Metals in Milk

2011 ◽  
Vol 54 (5) ◽  
pp. 1829-1835 ◽  
Author(s):  
J. F. Ping ◽  
J. Wu ◽  
Y. B. Ying ◽  
M. H. Wang ◽  
G. Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Composite Electrode ◽  
Carbon Composite ◽  
Trace Determination ◽  
Carbon Composite Electrode
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