Fabrication and characterization of extrinsic electrochemically modified graphite reinforcement carbon paste electrode for selective determination of Cu(II) in trace levels

Rahim, Asmaa M. Abdel; Gaber, Abd El‐Aal M.; Mahmoud, Esraa M.M.

doi:10.1016/j.apsadv.2020.100031

Cited by 13 publications

(5 citation statements)

References 18 publications

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“…The bare graphite reinforcement carbon paste electrode (BGRCPE) was prepared by hand-mixing 70% ( w / w ) powdered mechanical pencil-leads (60 mm) with 30% ( w / w ) mineral paraffin oil in a mortar and pestle until a completely homogeneous stiff paste was obtained. The homogenized carbon paste was allowed to rest for a minimum period of 24 hrs [ 40 ]. Then the carbon paste (CP) was packed and pressed firmly into the 2.0 mm internal diameter and 3.3 cm long tip of Micropipette, to produce the BGRCPE.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, veritable growing attention has been directed toward voltammetric techniques as powerful and established methods for the analysis of trace cadmium ions in contaminated foodstuffs and biological samples. Among those methods, differential pulse anodic stripping voltammetry (DPASV) [ 21 – 27 ], linear sweep voltammetry [ 28 , 29 ], adsorptive stripping voltammetry [ 30 – 34 ] and square-wave voltammetry (SWV) [ 35 – 40 ].…”

Section: Introductionmentioning

confidence: 99%

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Recent development of eco-friendly nanocomposite carbon paste electrode for voltammetric determination of Cd(II) in real samples

Rahim

Mahmoud

2022

ANAL. SCI.

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Using eco-friendly, cheap, and available adsorbents is promising for the determination of metal ions. So, this study focuses on the modification of graphite reinforcement carbon paste electrode (GRCPE) with mango seed kernel (MSK) for voltammetric determination of Cd(II). Moreover, to increase the surface area of this adsorbent, it was prepared in nanosized that formed nanoparticles of mango seed kernel (MSK-NPs). The developed nanocomposite electrode of carbon paste electrode modified with nanoparticles of mango seed kernel (MSK-NPs@GRCPE) was characterized using Fourier transform infrared (FTIR) and Scanning electron microscopy (SEM). The effect of pH, buffer solution, and supporting electrolyte as experimental conditions were optimized through differential pulse adsorptive anodic stripping voltammetric method (DPAdASV). Britton-Robinson buffer pH = 3.9 at Eacc = – 1400 mV, tacc = 30 s, pulse width = 10 ms and sampling time = 8 ms were the optimum conditions for determination of Cd(II). The LOD and LOQ of MSK-NPs@GRCPE were calculated at 5.44 × 10–9 and 1.65 × 10–8 M, respectively. Compared with bare graphite reinforcement carbon paste electrode (BGRCPE), the nanocomposite MSK-NPs@GRCPE has a lower detection limit, indicating that the presence of MSK-NPs could greatly improve the response to Cd(II). The practical applicability of the electrode was verified by the determination of Cd(II) in chocolate and white rice samples. The results show high selectivity and sensitivity for Cd(II) in real samples. Graphical abstract

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent development of eco-friendly nanocomposite carbon paste electrode for voltammetric determination of Cd(II) in real samples

Rahim

Mahmoud

2022

ANAL. SCI.

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“…Information about the surface morphology of the electrode surfaces can be obtained by SEM measurements [44,45]. SEM images of bare and coated electrodes were given in Figure 5A and Figure 5B, respectively.…”

Section: The Analysis Of 4hq3ca/gc By Semmentioning

confidence: 99%

Electrochemical Behavior and Ultrasensitive, Simple and Effective Voltammetric Determination of Acetaminophen Using Modified Glassy Carbon Electrode Based on 4‐Hydroxyquinoline‐3‐carboxylic Acid

Uzun

Calam

2022

Electroanalysis

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An electrochemical oxidation of acetaminophen (ACOP) has been successfully performed by using glassy carbon electrode covered with 4-hydroxyquinoline-3carboxylic acid (4HQ3CA) to reinforce electrode's feature. To characterize the modified electrode (4HQ3CA/ GC), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and Fourier transform infrared spectroscopy (FT-IR) techniques were used. The finding optimum conditions (supporting electrolyte, pH) and the electrochemical determination studies were performed with differential pulse voltammetry (DPV). It was decided that the supporting electrolyte medium suitable for ACOP determination was Britton-Robinson (BR) buffer and the effect of pH change on the oxidation peak of ACOP in this media was investigated. The effect of changing scan rate on the oxidation peak of ACOP was examined and this study showed that the oxidation process of ACOP on the 4HQ3CA/GC modified electrode surface was diffusion and adsorption controlled process. A wide concentration range from 0.0025 μM to 141 μM with a limit of detection (LOD) of 5.98 × 10 À 10 M (3 s/m) was obtained. This prepared sensor was carried out for the determination of ACOP in pharmaceutical sample.

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“…However, bare carbon paste electrode (BCPE) has poor sensitivity toward the analyte and low selectivity, particularly in the presence of interfering agents [13]. As a result, researchers have focused on modifying the CPE surface to improve selectivity and sensitivity [14]. Electro‐polymerization method has proved its effectiveness in producing a stable polymer layer on the electrode surface in a relatively short time and controlling the polymer's thickness [15].…”

Section: Introductionmentioning

confidence: 99%

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

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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 %.

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Fabrication and characterization of extrinsic electrochemically modified graphite reinforcement carbon paste electrode for selective determination of Cu(II) in trace levels

Cited by 13 publications

References 18 publications

Recent development of eco-friendly nanocomposite carbon paste electrode for voltammetric determination of Cd(II) in real samples

Recent development of eco-friendly nanocomposite carbon paste electrode for voltammetric determination of Cd(II) in real samples

Electrochemical Behavior and Ultrasensitive, Simple and Effective Voltammetric Determination of Acetaminophen Using Modified Glassy Carbon Electrode Based on 4‐Hydroxyquinoline‐3‐carboxylic Acid

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

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