A novel electrochemical sensor based on EDTA-NQS/GC for simultaneous determination of heavy metals

Toghan, Arafat; Abd-Elsabour, Mohamed; Abo‐Bakr, Ahmed M.

doi:10.1016/j.sna.2021.112603

Cited by 22 publications

(22 citation statements)

References 30 publications

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“…Furthermore, the oxidative and reductive peak potentials shifted to more positive and negative values. This behavior indicated a surface-controlled process of the electrode reactions process for the organic film of Nq formation [ 41 , 49 ].…”

Section: Resultsmentioning

confidence: 99%

“…The modification of GCE by a layer of Nq can be obtained by electrodeposition on the cleaned surface of GCE. This was performed by dipping GCE in 0.10 M PBS containing 3.33 mM of Nq monomer and was conditioned by cyclic sweeping from −1.25 to 1.3 V vs. Ag/AgCl for 15 cycles ( Section 3.2 ) [ 41 ]. The Nq/GCE was carefully cleaned with deionized water and dried in the air.…”

Section: Methodsmentioning

confidence: 99%

“…Straight lines were obtained. Moreover, by compensation of the slope in the following Randles–Sevcik equation used [ 41 ]. Ip = 0.446 nFAC(nFDν/RT) 1/2 where R is the universal gas constant (J/mol.K), n is the number of electrons, C is the concentration of the electroactive species (mM), F is the Faraday constant (C/mol), ν is the scan rate (mV/s), T is the temperature in Kelvin, Ip is the peak current, D isthe diffusion coefficient (cm 2 /s) and A(cm 2 ) is the electroactive surface area of the different types of electrodes.…”

Section: Methodsmentioning

confidence: 99%

“…Straight lines were obtained. Moreover,by compensation of the slope in the following Randles-Sevcik equation used [41]. Scheme 1.…”

Section: Go/nq/gce Fabricationmentioning

confidence: 99%

See 3 more Smart Citations

A Novel Electrochemical Sensor for Detection of Nicotine in Tobacco Products Based on Graphene Oxide Nanosheets Conjugated with (1,2-Naphthoquinone-4-Sulphonic Acid) Modified Glassy Carbon Electrode

et al. 2022

Self Cite

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A simple electrochemical sensor for nicotine (NIC) detection was performed. The sensor based on a glassy carbon electrode (GCE) was modified by (1,2-naphthoquinone-4-sulphonic acid)(Nq) decorated by graphene oxide (GO) nanocomposite. The synthesized (GO) nanosheets were characterized using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), transmission electron microscope (TEM), FT-IR, and UV-Visible Spectroscopy. The insertion of Nq with GO nanosheets on the surface of GCE displayed high electrocatalytic activity towards NIC compared to the bare GCE. NIC determination was performed under the optimum conditions using 0.10 M of Na2SO4 as a supporting electrolyte with pH 8.0 at a scan rate of 100 mV/s using both cyclic voltammetry (CV) and differential pulse voltammetry (DPV). This electrochemical sensor showed an excellent result for NIC detection. The oxidation peak current increased linearly with a 6.5–245 µM of NIC with R2 = 0.9999. The limit of detection was 12.7 nM. The fabricated electrode provided satisfactory stability, reproducibility, and selectivity for NIC oxidation. The reliable GO/Nq/GCE sensor was successfully applied for detecting NIC in the tobacco product and a urine sample.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Straight lines were obtained. Moreover,by compensation of the slope in the following Randles-Sevcik equation used [41]. Scheme 1.…”

Section: Go/nq/gce Fabricationmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Electrochemical Sensor for Detection of Nicotine in Tobacco Products Based on Graphene Oxide Nanosheets Conjugated with (1,2-Naphthoquinone-4-Sulphonic Acid) Modified Glassy Carbon Electrode

et al. 2022

Self Cite

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“…In addition, because the testing equipment is bulky, they are not suitable for on-site testing [10]. Electrochemistry, which has the advantages of low detection cost, high sensitivity, convenience, portability, and strong on-site detection capability [11][12][13], is widely used in the field of detecting heavy metals in the aquatic environment. The electrochemical method commonly used for heavy-metal detection is square-wave pulse voltammetry (SWV).…”

Section: Introductionmentioning

confidence: 99%

A Portable Sensor System with Ultramicro Electrode Chip for the Detection of Heavy-Metal Ions in Water

Wang

Jiang

et al. 2021

Micromachines

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In this study, an ultramicro interdigital electrode array chip (UIEA) was designed and fabricated by using Micro-Electro-Mechanical systems (MEMS) technology, and a portable detection system, using the chip for determination of heavy-metal ions in water, was developed. The working electrode of the UIEA was modified with gold nanoparticles by electrodeposition. The detection sensitivity of the UIEA chip for copper ions was 0.0138 μA·L·μg−1, with the linear range of 0–400 μg/L and the detection limit of 18.89 μg/L (3σ), which was better than that of the compared columnar glassy carbon electrode. The results of the interference experiment verified that the UIEA chip has a certain anti-interference ability against common heavy-metal ions in water, such as Pb2+, Zn2+, and Mg2+ ions. The standard addition method was used to investigate the performance of the developed s ystem for copper ion determination in real water. The recovery range from 87.5% to 94.7% was achieved.

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Microfluidics Evolution and Surface Functionalization: A Pathway to Enhanced Heavy Metal Ion Detection

Xu,

Jaiswal,

Liu

et al. 2024

Advanced Sensor Research

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This review delves into the significant advancements in microfluidic technology since 2017, highlighting its critical role in shrinking device sizes and integrating advanced surface functionalization techniques. It showcases how microfluidics, an interdisciplinary field, has revolutionized fluid manipulation on a microscale, enabling the creation of cost‐effective, portable devices for on‐the‐spot analyses, like heavy metal ion detection. From its early days rooted in ancient observations to cutting‐edge uses of materials like silicon, glass, polydimethylsiloxane (PDMS), and paper, this review charts microfluidics’ dynamic evolution. It emphasizes the transformative impact of surface functionalization methods, including silanization and plasma treatments, in enhancing device materials' performance. Moreover, this review anticipates the exciting convergence of microfluidics with emerging technologies like droplet microfluidics and three‐dimensional (3D) printing, alongside nanotechnology, forecasting a future of sophisticated analytical tools, point‐of‐care diagnostics, and improved detection systems. It acknowledges the hurdles in scaling production and achieving universal reliability and standardization. This review highlights the transformative impact of microfluidic technology on diagnostics and environmental surveillance, emphasizing its utility in deploying compact sensors for comprehensive and concurrent evaluations of water quality.

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A novel electrochemical sensor based on EDTA-NQS/GC for simultaneous determination of heavy metals

Cited by 22 publications

References 30 publications

A Novel Electrochemical Sensor for Detection of Nicotine in Tobacco Products Based on Graphene Oxide Nanosheets Conjugated with (1,2-Naphthoquinone-4-Sulphonic Acid) Modified Glassy Carbon Electrode

A Novel Electrochemical Sensor for Detection of Nicotine in Tobacco Products Based on Graphene Oxide Nanosheets Conjugated with (1,2-Naphthoquinone-4-Sulphonic Acid) Modified Glassy Carbon Electrode

A Portable Sensor System with Ultramicro Electrode Chip for the Detection of Heavy-Metal Ions in Water

Microfluidics Evolution and Surface Functionalization: A Pathway to Enhanced Heavy Metal Ion Detection

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