scholarly journals Electrochemical Determination of Norepinephrine by Means of Modified Glassy Carbon Electrodes with Carbon Nanotubes and Magnetic Nanoparticles of Cobalt Ferrite

Sensors ◽  
2018 ◽  
Vol 18 (4) ◽  
pp. 1223 ◽  
Author(s):  
Daniely Queiroz ◽  
Tony Dadamos ◽  
Sergio Machado ◽  
Marco Martines
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Nanoparticles ◽  
Glassy Carbon ◽  
Cobalt Ferrite ◽  
Electrochemical Determination ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes

Ultrasensitive Electrochemical Determination of Phosphate in water by Hydrophilic TiO2 modified Glassy Carbon Electrodes

2021 ◽  
Author(s):  
Yan Jin ◽  
Tong QI ◽  
Yuqing Ge ◽  
Jin Chen ◽  
Li juan Liang ◽  
...  
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon ◽  
Differential Pulse ◽  
Electrochemical Determination ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes ◽  
Time Differential ◽  
Pulse Voltammetry ◽  
First Time

In this paper, ultrasensitive electrochemical determination of phosphate in water is achieved by hydrophilic TiO2 modified glassy carbon electrodes for the first time. Differential pulse voltammetry (DPV) method is proposed...

Quick and Easy Modification of Glassy Carbon Electrodes with Ionic Liquid and Tetraruthenated Porphyrins for the Electrochemical Determination of Atrazine in Water

2019 ◽  
Vol 31 (4) ◽  
pp. 671-677 ◽  
Author(s):  
Karla Calfumán ◽  
Jessica Honores ◽  
Mauricio Isaacs ◽  
Diego Quezada ◽  
Javier Valdebenito ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Glassy Carbon ◽  
Electrochemical Determination ◽  
Carbon Electrodes ◽  
Glassy Carbon Electrodes

scholarly journals Highly Selective Determination of Dopamine in the Presence of Ascorbic Acid and Serotonin at Glassy Carbon Electrodes Modified with Carbon Nanotubes Dispersed in Polyethylenimine

2008 ◽  
Vol 8 (11) ◽  
pp. 6003-6009 ◽  
Author(s):  
Marcela C. Rodríguez ◽  
María D. Rubianes ◽  
Gustavo A. Rivas
Keyword(s):  
Carbon Nanotubes ◽  
Ascorbic Acid ◽  
Glassy Carbon ◽  
Carbon Electrodes ◽  
Acid Oxidation ◽  
Promising Alternative ◽  
Glassy Carbon Electrodes ◽  
Multi Wall Carbon Nanotubes ◽  
Selective Determination

We report the highly selective and sensitive voltammetric dopamine quantification in the presence of ascorbic acid and serotonin by using glassy carbon electrodes modified with a dispersion of multi-wall carbon nanotubes (MWCNT) in polyethylenimine, PEI (GCE/MWCNT-PEI). The electrocatalytic activity of the MWCNT deposited on the glassy carbon electrode has allowed an important decrease in the overvoltages for the oxidation of ascorbic acid and dopamine, making possible a clear definition of dopamine, serotonin and ascorbic acid oxidation processes. The sensitivities for dopamine in the presence and absence of 1.0 mM ascorbic acid and serotonin were (2.18±0.03 × 105 μAM−1 (r = 0.9998); and (2.10±0.07 × 105 μAM−1 (r = 0.9985), respectively, demonstrating the excellent performance of the GCE/MWCNT-PEI. The detection limit for dopamine in the mixture was 9.2 × 10−7 M. The R. S. D. for the determination of 50 μM dopamine using four different electrodes was 3.9% when modified with the same MWCNT/PEI dispersion, and 4.6% when using four different dispersions. The modified electrode has been successfully applied for recovery assays of dopamine in human blood serum. Therefore, the new sensor represents an interesting and promising alternative for the electrochemical quantification of neurotransmitters and other analytes of clinical interest.

Sign in / Sign up

Export Citation Format

Share Document