Carbon Paste Electrode Modified by Multiwalled Carbon Nanotube "for Electrochemical Determination" of Vitamin C

Khodari, Mahmoud; Rabie, E. M.; Shamroukh, A.A.

doi:10.13189/ijbb.2018.060204

Cited by 4 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SA is studying the effect of supporting electrolyte, its pH value, and scan rates. the properties of the solution as well as the electrode solution interface, modifying the adsorption at the electrode surface, and the thermodynamics and kinetics of the charge transfer process [34]. Therefore, the effect of different supporting electrolytes such as (perchloric acid solution, Britton-Robinson buffer, acetate, and phosphate) was examined on the oxidation peak of SA at the same of conditions.…”

Section: Cyclic Voltammetry (Cv)mentioning

confidence: 99%

Fabrication of a New Electrochemical Sensor Based on Carbon Paste Electrode Modified by Silica gel/ MWCNTs for the Voltammetric Determination of Salicylic Acid in Tomato

et al. 2019

View full text Add to dashboard Cite

Walled Carbon Nano-tubes a fabrication and application of a novel sensor of carbon paste electrode modified by silica gel/MWCNTs for the determination of salicylic acid (SA) by different voltammetric techniques such as Linear Sweep, Cyclic and Square Wave Voltammetry. The electrochemical behavior of SA has been investigated and the optimum experimental conditions such as the effect of supporting electrolyte, pH and scan rate on the anodic peak of SA was determined. Square Wave Voltammetry (SWV) was employed to determine SA, where the important parameters such as frequency were achieved. Moreover, the results showed that modified electrode exhibited excellent electrocatalytic activity towards the oxidation of SA. The results showed irreversible process with one oxidation peak of SA at the surface of modified electrode and the overpotential of SA decreased significantly compared with that at the bare carbon paste electrode (CPE). This electrochemical sensor shows an excellent performance for detecting SA with a detection limit and limit of quantification were 0.9 × 10 -9 M and 2.99 × 10 -9 M respectively. In addition, the peak currents increased linearly in the concentration range of 3.0-70 nM. The results showed also, the fabricated sensor was successfully applied to the detection of SA in tomato with good recovery ranging from 96.60 to 103%, Moreover, the proposed electrode revealed good reproducibility and stability, with standard deviation (S.D.) 2.3% for eight successive measurements of SA.

show abstract

Section: Cyclic Voltammetry (Cv)mentioning

confidence: 99%

Fabrication of a New Electrochemical Sensor Based on Carbon Paste Electrode Modified by Silica gel/ MWCNTs for the Voltammetric Determination of Salicylic Acid in Tomato

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Many electrochemical sensors for the determination of IAA have been used [11][12][13][14][15][16]. Carbon paste electrodes (CPEs) have been applied in various electrochemistry applications because of their advantages over mercuryfree solid electrodes in terms of ease of preparation, speed, stable response, porous surface, renewability, low cost, low ohmic resistance, and no need for the internal solution [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A Novel Electrochemical Sensor Based on Modified Carbon Paste Electrode with ZnO Nanorods for the Voltammetric Determination of Indole‐3‐acetic Acid in Plant Seed Extracts

2022

Self Cite

View full text Add to dashboard Cite

Detection of indole-3-acetic acid (IAA), as a phytohormone, is important for precision farming, plant phenotyping, and crop management. Herein, IAA was detected in bean and wheat plant seeds extractions using zinc oxide nanorods/carbon paste electrode (ZnO NRs/ CPE). ZnO NRs/CPE showed excellent electrocatalytic activity, high sensitivity, and selectivity toward the oxidation of IAA. The linearity range was from 30. × 10 À 8 to 5.0 × 10 À 6 M (r 2 = 0.996, n = 10), with a detection limit of 1.7 × 10 À 8 M. Moreover, ZnO NRs/CPE exhibited high reproducibility, with a standard deviation of 1.0 % for six successive measurements of IAA.

show abstract

Electrocatalytic Determination of the antibiotic Levofloxacin using modified carbon paste electrode with a poly‐murexide thin film voltammetrically

Khodari¹,

Hassan

Mohamed³

et al. 2023

Electroanalysis

Self Cite

View full text Add to dashboard Cite

In this work, a simple, cheap, sensitive, and selective modified carbon paste electrode is proposed for the electroanalytical determination of Levofloxacin (LEVO), the drug used to treat pneumonia caused by coronavirus. The electrochemical polymerization method was applied to create a thin poly-murexide film (POMUR) on the bare carbon paste electrode (BCPE) surface to enhance its electrocatalytic activity. The peak current response of LEVO obtained by POMUR/CPE was increased by 14.2 μA compared to BCPE. Scanning electron microscopy (SEM) and cyclic voltammetry (CV) techniques were employed to characterize BCPE and POMUR/CPE. Under the optimal experimental circumstances, the prepared sensor was capable of determining LEVO with a low limit of detection (LOD) of 7.18 nM (S/N = 3) for a linear dynamic range of 25 -1 × 10 3 nM utilizing differential pulse voltammetry (DPV). Moreover, the practical applicability of POMUR/CPE for determining LEVO in pharmaceutical formulations and biological samples (human serum) demonstrated high sensitivity and selectivity with a recovery of 95.08 -100.5 %.

show abstract

Carbon Paste Electrode Modified by Multiwalled Carbon Nanotube "for Electrochemical Determination" of Vitamin C

Cited by 4 publications

References 29 publications

Fabrication of a New Electrochemical Sensor Based on Carbon Paste Electrode Modified by Silica gel/ MWCNTs for the Voltammetric Determination of Salicylic Acid in Tomato

Fabrication of a New Electrochemical Sensor Based on Carbon Paste Electrode Modified by Silica gel/ MWCNTs for the Voltammetric Determination of Salicylic Acid in Tomato

A Novel Electrochemical Sensor Based on Modified Carbon Paste Electrode with ZnO Nanorods for the Voltammetric Determination of Indole‐3‐acetic Acid in Plant Seed Extracts

Electrocatalytic Determination of the antibiotic Levofloxacin using modified carbon paste electrode with a poly‐murexide thin film voltammetrically

Contact Info

Product

Resources

About