Voltammetric determination of diazepam using a bismuth modified pencil graphite electrode

Dehghanzade, Mahsa; Alipour, Esmaeel

doi:10.1039/c6ay00098c

Cited by 22 publications

(15 citation statements)

References 49 publications

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“…Also, the performance of this PPGE is comparable to that of pencil graphite electrodes modified by other materials. 34, [38][39][40] Besides, because of nonuse of expensive materials for electrode modification and easy-touse application of this sensor, this sensor is superior to other modified pencil graphite electrodes.…”

Section: Potentiodynamic Methodsmentioning

confidence: 99%

Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

ParviziFard

Alipour

Sefidi

et al. 2018

J Chinese Chemical Soc

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A pretreated pencil graphite electrode (PPGE) as an electrochemical sensor was developed and applied to measure diclofenac sodium (DIC). The effects of both potentiostatic and potentiodynamic strategies in the electrochemical pretreatment and performance of the electrode were studied, and it was concluded that the former offers better analytical sensitivity for electroanalytical purposes. PPGE displayed good electrocatalytic activity in comparison to nonpretreated PGE (NPGE). Differential pulse voltammetry (DPV) was used to determine DIC. Therefore, a calibration graph was plotted between the variation of anodic peak currents and the DIC concentration, which was found to be linear in the range 0.23–12.95 μmol/L with the detection limit (S/N = 3) of 0.12 μmol/L. PPGE was utilized to determine DIC in real samples such as biological and pharmaceutical ones, and the good recovery values obtained demonstrated the high accuracy of the modified electrode.

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Section: Potentiodynamic Methodsmentioning

confidence: 99%

Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

ParviziFard

Alipour

Sefidi

et al. 2018

J Chinese Chemical Soc

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“…510 Bi compounds have been used to modify different carbonaceous electrode materials, such as carbon pastes, 511 graphite-epoxy composites, 512 borondoped diamond, 513 carbon films, 514 glassy carbon, 431 screenprinted carbon inks, 515 or pencil graphite. 516 Bi has also been deposited in combination with polymers, 517,518 and on metallic electrodes, such as Au, Cu, or Pb. 449 Studies have shown that the incorporation of Bi NPs onto an electrode surface is more attractive compared to pre-plating the BiFEs on the electrode.…”

Section: Bi Nanocrystals and Bi Film Electrodes (Bifes) For Biosensingmentioning

confidence: 99%

The versatile biomedical applications of bismuth-based nanoparticles and composites: therapeutic, diagnostic, biosensing, and regenerative properties

et al. 2020

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Studies of nanosized forms of bismuth (Bi)-containing materials have recently expanded from optical, chemical, electronic, and engineering fields towards biomedicine, as a result of their safety, cost-effective fabrication processes, large surface area, high stability, and high versatility in terms of shape, size, and porosity. Bi, as a nontoxic and inexpensive diamagnetic heavy metal, has been used for the fabrication of various nanoparticles (NPs) with unique structural, physicochemical, and compositional features to combine various properties, such as a favourably high X-ray attenuation coefficient and near-infrared (NIR) absorbance, excellent light-to-heat conversion efficiency, and a long circulation half-life. These features have rendered bismuth-containing nanoparticles (BiNPs) with desirable performance for combined cancer therapy, photothermal and radiation therapy (RT), multimodal imaging, theranostics, drug delivery, biosensing, and tissue engineering. Bismuth oxyhalides (BiO x , where X is Cl, Br or I) and bismuth chalcogenides, including bismuth oxide, bismuth sulfide, bismuth selenide, and bismuth telluride, have been heavily investigated for therapeutic purposes. The pharmacokinetics of these BiNPs can be easily improved via the facile modification of their surfaces with biocompatible polymers and proteins, resulting in enhanced colloidal stability, extended blood circulation, and reduced toxicity. Desirable antibacterial effects, bone regeneration potential, and tumor growth suppression under NIR laser radiation are the main biomedical research areas involving BiNPs that have opened up a new paradigm for their future clinical translation. This review emphasizes the synthesis and state-of-the-art progress related to the biomedical applications of BiNPs with different structures, sizes, and compositions. Furthermore, a comprehensive discussion focusing on challenges and future opportunities is presented.

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“…Where, I pa is Anodic peak current, n is the number of electrons transferred, A 0 is surface area of the electrode (cm 2 ), D 0 is diffusion coefficient, C is concentration of Fe(CN) 6 3À/4À and u is the scan rate, R is molar gas constant (8.314 JK À1 mol À1 ) and F is Faraday's constant (96480 C mol À1 ). For 1.0 mM K 3 Fe(CN) 6 in 0.1 M KCl at Temperature, T = 298 K, n = 1 and D 0 = 7.6 3 10 À6 cm 2 s À1 . The surface area is calculated from the slope obtained from plot of I pa versus u 1/2 and by putting the values in above equation with scan rate 50 mV s À1 .…”

Section: Cyclic Voltammetric Characterization Of Electrodementioning

confidence: 99%

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

2017

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Herein, a facile procedure was developed for designing an electrochemical sensor based on pencil graphite electrode modified with electrochemically synthesized silver and copper nanoparticles (AgNP and CuNP) supported on functionalized multiwalled carbon nanotubes (fMWCNTs). The electrochemical and morphological characterization was carried out by cyclic voltammetry, Electrochemical Impedance Spectroscopy, Powder X‐ray diffraction, Field Emission Scanning Electron Microscopy, Transmission electron microscopy and Atomic Force Microscopy. The designed sensor exhibited electrocatalytic behavior towards the reduction of Imazethapyr. Results indicates the combination of AgNPs, CuNPs and fMWCNTs on PGE produced remarkable enhancement in electrocatalytic and sensing properties. Various electro‐kinetic parameters like Rct, kapp, n, α, E0, k0, Γ, D and k have been evaluated by CV, impedance and Chronoamperometric studies. The electrochemical performance was improved by optimizing the effect of pH, scan rate, amount of fMWCNTs and deposition parameters of AgNP and CuNP. The sensor was efficaciously applied for determination of Imazethapyr and exhibited a linear correlation in the concentration range of 0.01–5.0 μg mL−1 with low detection limits, 0.159 ng mL−1 using AdSWV. The fabricated sensor exhibited good accuracy, acceptable stability and high efficacy for quantitative determination of Imazethapyr in real samples with notable recoveries ranging from 98 % to 100.2 %.

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Voltammetric determination of diazepam using a bismuth modified pencil graphite electrode

Abstract: CVs of diazepam at the different PGEs.

Cited by 22 publications

References 49 publications

Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

Pretreated Pencil Graphite Electrode as a Versatile Platform for Easy Measurement of Diclofenac Sodium in a Number of Biological and Pharmaceutical Samples

The versatile biomedical applications of bismuth-based nanoparticles and composites: therapeutic, diagnostic, biosensing, and regenerative properties

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

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