Electrocatalytic determination of dopamine in the presence of uric acid using an indenedione derivative and multiwall carbon nanotubes spiked in carbon paste electrode

2013 ◽  
Vol 33 (3) ◽  
pp. 1491-1497 ◽  
Author(s):  
Navid Nasirizadeh ◽  
Zahra Shekari ◽  
Hamid R. Zare ◽  
Somayeh Makarem
Keyword(s):  
Carbon Nanotubes ◽  
Uric Acid ◽  
Carbon Paste Electrode ◽  
Multiwall Carbon Nanotubes ◽  
Carbon Paste ◽  
Electrocatalytic Determination ◽  
Paste Electrode ◽  
Multiwall Carbon

Sensitive determination of colchicine at carbon paste electrode doped with multiwall carbon nanotubes

2013 ◽  
Vol 5 (7) ◽  
pp. 1830 ◽  
Author(s):  
Kai Zhang ◽  
Jing Zhou ◽  
Jie Liu ◽  
Kunjing Li ◽  
Yinfeng Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Paste Electrode ◽  
Multiwall Carbon Nanotubes ◽  
Carbon Paste ◽  
Sensitive Determination ◽  
Paste Electrode ◽  
Multiwall Carbon

scholarly journals A New Sensitive Sensor for Simultaneous Differential Pulse Voltammetric Determination of Codeine and Acetaminophen Using a Hydroquinone Derivative and Multiwall Carbon Nanotubes Carbon Paste Electrode

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Elahe Garazhian ◽  
M. Reza Shishehbore
Keyword(s):  
Carbon Nanotubes ◽  
Differential Pulse Voltammetry ◽  
Multiwall Carbon Nanotubes ◽  
Differential Pulse ◽  
Carbon Paste ◽  
Sensitive Sensor ◽  
Pulse Voltammetry ◽  
Paste Electrode ◽  
Multiwall Carbon

A new sensitive sensor was fabricated for simultaneous determination of codeine and acetaminophen based on 4-hydroxy-2-(triphenylphosphonio)phenolate (HTP) and multiwall carbon nanotubes paste electrode at trace levels. The sensitivity of codeine determination was deeply affected by spiking multiwall carbon nanotubes and a modifier in carbon paste. Electron transfer coefficient,α, catalytic electron rate constant,k, and the exchange current density,j0, for oxidation of codeine at the HTP-MWCNT-CPE were calculated using cyclic voltammetry. The calibration curve was linear over the range 0.2–844.7 μM with two linear segments, and the detection limit of 0.063 μM of codeine was obtained using differential pulse voltammetry. The modified electrode was separated codeine and acetaminophen signals by differential pulse voltammetry. The modified electrode was applied for the determination of codeine and acetaminophen in biological and pharmaceutical samples with satisfactory results.

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