Modification of a pencil graphite electrode with multiwalled carbon nanotubes capped gold nanoparticles for electrochemical determination of tramadol

Kolahi-Ahari, Simin; Deiminiat, Behjat; Rounaghi, Gholam Hossein

doi:10.1016/j.jelechem.2020.113996

Cited by 53 publications

(23 citation statements)

References 32 publications

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“…Prior to functionalization, the glassy carbon electrode (GCE) was buffed with alumina powder (0.03 μm) and then was ultrasonically cleaned by absolute ethyl alcohol and ultrapure water for 20 min. In order to capture the thiol-modified h-DNA via the Au–S bonds, two different gold nanospheres (GNSs) functional electrodes were prepared based on previous studies: 28 (1) MWCNTs–GNSs-coated GCE (MWCNTs–GNSs/GCE). Here, 2 mg of MWCNTs was dissolved in N,N -dimethylformamide and ultrasonically dispersed for 30 s at room temperature to form a uniform solution.…”

Section: Methodsmentioning

confidence: 99%

A switchable electrochemical hairpin-aptasensor for ochratoxin A detection based on the double signal amplification effect of gold nanospheres

Chen

et al. 2022

New J. Chem.

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Section: Methodsmentioning

confidence: 99%

A switchable electrochemical hairpin-aptasensor for ochratoxin A detection based on the double signal amplification effect of gold nanospheres

Chen

et al. 2022

New J. Chem.

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“…An araldite mixture (epoxy resin, 1:1) [16,41,[43][44][45], bentonite [38,39], or cyanoacrylate glue [40] was used to fix the graphite lead into the support. Other PGEs were obtained by covering a part of the graphite lead with nail polish [53] or with Teflon tape [20,[54][55][56][57][58][59][60][61][62][63][64][65] (Figure 1e), leaving a constant length and area of nacked pencil mine to act as an electroative surface. The electrical contact with the potentiostat is provided by a metallic (copper) wire wrapped arround the end of the mine, which is not exposed to the analyzed solution.…”

Section: Pge Manufacturing Proceduresmentioning

confidence: 99%

“…A bismuth film-plated PGE [104] and a porous copper microparticles modified PGE were fabricated by ex situ potentiostatic deposition [19] and then transferred to the analyte solution, which was voltametrically investigated (Table 3). Layers and nanoparticles of various other materials were also deposited on the PGE surface by applying a given potential for a certain time [61,[63][64][65]68,91,92,[105][106][107].…”

Section: Applications Of (Electro)chemically Modified Pges To the Vol...mentioning

confidence: 99%

“…Other modified PGEs were manufactured by dip [17,61,69,87,88,90,92,127,132,133] or spin coating [48,[50][51][52]125,126,134]. Drop coating was applied to produce Mo 5 O 8 /PGE [34], Trypan blue-modified PGEs [44], different CNT-modified PGEs [47,57,58,68], or PGEs covered with various modifiers [41,49,62,65,135].…”

Section: Applications Of (Electro)chemically Modified Pges To the Vol...mentioning

confidence: 99%

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Recent Developments in Voltammetric Analysis of Pharmaceuticals Using Disposable Pencil Graphite Electrodes

et al. 2022

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The even growing production of both well-known and new derivatives with pharmaceutical action involves the need for developing facile and reliable methods for the analysis of these compounds. Among the widely used instrumental techniques, the electrochemical ones are probably the simplest and the most rapid, also having good performance characteristics. However, the key tool in electroanalysis is the working electrode. Due to the inherent electrochemical and economic advantages of the pencil graphite electrode (PGE), the interest in its applicability in the analysis of different analytes has continuously increased in recent years. Thus, this paper aims to review the scientific reports published in the last 10 years on the use of the disposable eco- and user-friendly PGEs in the electroanalysis of compounds of pharmaceutical importance in different matrices. The PGE characteristics and designs (bare or modified with various types of materials), along with their applications and performance parameters (e.g., linear range, limit of detection, and reproducibility), will be discussed, and their advantages and limitations will be critically emphasized.

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“…Approximately 50% of consumed SMT remains unmetabolised in parent animals and may be excreted to water bodies [ 8 ]. Another investigated PPCP in this study is TRA, which is a painkiller and opioid analgesic [ 9 ]. It is not completely eliminated by wastewater treatment plants and usually discovered in effluents after treatment and in surface waters [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of Pharmaceutical Micropollutants with Integrated Biochar and Marine Microalgae

et al. 2020

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Using microalgae to remove pharmaceuticals and personal care products (PPCPs) micropollutants (MPs) have attracted considerable interest. However, high concentrations of persistent PPCPs can reduce the performance of microalgae in remediating PPCPs. Three persistent PPCPs, namely, carbamazepine (CBZ), sulfamethazine (SMT) and tramadol (TRA), were treated with a combination of Chaetoceros muelleri and biochar in a photobioreactor during this study. Two reactors were run. The first reactor comprised Chaetoceros muelleri, as the control, and the second reactor comprised Chaetoceros muelleri and biochar. The second reactor showed a better performance in removing PPCPs. Through the response surface methodology, 68.9% (0.330 mg L−1) of CBZ, 64.8% (0.311 mg L−1) of SMT and 69.3% (0.332 mg L−1) of TRA were removed at the initial concentrations of MPs (0.48 mg L−1) and contact time of 8.1 days. An artificial neural network was used in optimising elimination efficiency for each MP. The rational mean squared errors and high R2 values showed that the removal of PPCPs was optimised. Moreover, the effects of PPCPs concentration (0–100 mg L−1) on Chaetoceros muelleri were studied. Low PPCP concentrations (<40 mg L−1) increased the amounts of chlorophyll and proteins in the microalgae. However, cell viability, chlorophyll and protein contents dramatically decreased with increasing PPCPs concentrations (>40 mg L−1).

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Modification of a pencil graphite electrode with multiwalled carbon nanotubes capped gold nanoparticles for electrochemical determination of tramadol

Cited by 53 publications

References 32 publications

A switchable electrochemical hairpin-aptasensor for ochratoxin A detection based on the double signal amplification effect of gold nanospheres

A switchable electrochemical hairpin-aptasensor for ochratoxin A detection based on the double signal amplification effect of gold nanospheres

Recent Developments in Voltammetric Analysis of Pharmaceuticals Using Disposable Pencil Graphite Electrodes

Removal of Pharmaceutical Micropollutants with Integrated Biochar and Marine Microalgae

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