Multiwall carbon nanotubes chemically modified carbon paste electrodes for determination of gentamicin sulfate in pharmaceutical preparations and biological fluids

2016 ◽  
Vol 59 ◽  
pp. 838-846 ◽  
Author(s):  
M.M. Khalil ◽  
G.M. Abed El-aziz
Keyword(s):  
Carbon Nanotubes ◽  
Biological Fluids ◽  
Multiwall Carbon Nanotubes ◽  
Pharmaceutical Preparations ◽  
Carbon Paste ◽  
Chemically Modified ◽  
Carbon Paste Electrodes ◽  
Multiwall Carbon ◽  
Modified Carbon Paste Electrodes

Determination of meloxicam in plasma samples using a highly selective and sensitive voltammetric sensor based on carbon paste electrodes modified by molecularly imprinted polymer nanoparticle–multiwall carbon nanotubes

2015 ◽  
Vol 7 (4) ◽  
pp. 1280-1292 ◽  
Author(s):  
Saman Azodi-Deilami ◽  
Ebadullah Asadi ◽  
Majid Abdouss ◽  
Fardin Ahmadi ◽  
Alireza Hassani Najafabadi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwall Carbon Nanotubes ◽  
Voltammetric Sensor ◽  
Plasma Samples ◽  
Carbon Paste ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Carbon Paste Electrodes ◽  
Multiwall Carbon

A highly selective voltammetric sensor for the determination of meloxicam using a MIP@MWCNT–CPE is introduced.

Fabrication of chemically and in situ modified carbon paste electrodes for the potentiometric determination of chlorpromazine HCl in pure pharmaceutical preparations, urine and serum

2017 ◽  
Vol 41 (24) ◽  
pp. 15612-15624 ◽  
Author(s):  
Gehad G. Mohamed ◽  
Eman Y. Z. Frag ◽  
M. A. Zayed ◽  
M. M. Omar ◽  
Sally E. A. Elashery
Keyword(s):  
Biological Fluids ◽  
Pharmaceutical Preparations ◽  
Pharmaceutical Formulations ◽  
Carbon Paste ◽  
Chlorpromazine Hydrochloride ◽  
Carbon Paste Electrodes ◽  
Urine And Serum ◽  
Modified Carbon Paste Electrodes

Newly developed modified and in situ modified carbon paste sensors were developed for the determination of chlorpromazine hydrochloride (CPZHC) in pharmaceutical formulations and biological fluids (urine and serum).

scholarly journals Nanomaterial-Based Carbon Paste Electrodes for Voltammetric Determination of Naproxen in Presence of Its Degradation Products

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Hassan A. M. Hendawy ◽  
Waheed M. Salem ◽  
Mahmmoud S. Abd-Elmonem ◽  
Elmorsy Khaled
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanomaterials ◽  
Degradation Products ◽  
Phosphate Buffer Solution ◽  
Pharmaceutical Preparations ◽  
Matrix Composition ◽  
Human Blood Plasma ◽  
Carbon Paste ◽  
Carbon Paste Electrodes

The present work describes a novel, simple, and fast electroanalytical methodology for naproxen (NAP) determination in pharmaceutical formulations and biological fluids in the presence of its degradation products. Carbon paste electrodes (CPEs) modified with different carbon nanomaterials, namely, glassy carbon powder (GCE), multiwall carbon nanotubes (MWCNTs), single-walled carbon nanotubes (SWCNTs), graphene nanosheets (Gr), and graphene oxides (GO) were tested. Comprehensive studies were performed on the electrode matrix composition including the nature of the pasting liquids, pH, carbon nanomaterials, and mode of electrode modification. Two anodic oxidation peaks were recorded at 0.890 and 1.18 V in 1 × 10−1 mol·L−1 phosphate buffer solution at pH 6. Oxidation of naproxen (NAP) is an irreversible diffusion-controlled process. Calibration plots were rectilinear in the concentration ranging from 0.067 to 1.0 µg·mL−1 with correlation coefficient 0.9979. Photodegradation of NAP resulted in disappearance of the oxidation peak at 1.18 V, allowing simultaneous determination of NAP in presence of its degradation product. The achieved high sensitivity and selectivity suggest the application of the proposed protocol for naproxen determination in pharmaceutical preparations and human blood plasma.

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.

Determination of iron(II) with chemically-modified carbon-paste electrodes

Talanta ◽  
1991 ◽  
Vol 38 (10) ◽  
pp. 1177-1184 ◽  
Author(s):  
Zhiqiang Gao ◽  
Peibiao Li ◽  
Zaofan Zhao
Keyword(s):  
Carbon Paste ◽  
Chemically Modified ◽  
Carbon Paste Electrodes ◽  
Modified Carbon Paste Electrodes
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