Voltammetric determination of mercury in biological samples using crown ether/multiwalled carbon nanotube-based sensor

Hassan, Rabeay Y. A.; Kamel, Manal S.; Hassan, H. N. A.; Khaled, Elmorsy

doi:10.1016/j.jelechem.2015.10.039

Cited by 29 publications

(10 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the incorporation of nanotubes into the electrode matrix enhanced the sensor performance through improving the conductivity and transduction of the chemical signal to electrical signal . However, the MWCNTs presented the highest performance towards the catalytic oxidation of POS.…”

Section: Resultsmentioning

confidence: 99%

“…The improvement is attributed to improving the electron transport of POS on electrode surface and facilitated the oxidation reaction owing to the catalytic properties of MWCNTs which increase the effective surface area of the electrode. This finding is correlated with our previous results which revealed the advantages of MWCNTs …”

Section: Resultsmentioning

confidence: 99%

“…Three electrode‐platforms of screen printed electrode (SPE): (DropSens: ref. DRP‐110 CNT), ceramic substrate: L 33×W 10×H 0.5 mm; working electrode (4 mm diameter) was made of carbon nanotubes, whereas the counter electrode was made of carbon, and the reference electrode and electric contacts were made of silver . The pH measurements were carried out using digital pH‐meter Mohr, cooling centrifugation was done on Centurion cooling centrifuge model (K2015R).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

A Disposable Carbon Nanotubes‐screen Printed Electrode (CNTs‐SPE) for Determination of the Antifungal Agent Posaconazole in Biological Samples

et al. 2016

View full text Add to dashboard Cite

For the first time, the use of carbon nanotubes was exploited for the development of a sensitive electrochemical method for determination of the newly antifungal posaconazole (POS). The electrochemical activity of POS was investigated at the surface of multi‐walled nanotubes (MWNTs) modified electrode. The cyclic voltammograms showed a sharp oxidation peak at potential around 671 mV vs. Ag/AgCl. To reach the assay optimization, factors affecting the method sensitivity have been investigated, such as types of carbon nanotubes and its concentration in the electrode matrix, type of supporting electrolyte, pH, accumulation time and scan rate. A good linear relationship was obtained within the concentration range from 32–1280 ng/ml with the limit of detection and quantification of 11 ng/ml and 33 ng/ml, respectively. The proposed method was successfully applied for the determination of POS in its commercial dosage form, spiked human plasma samples, and dried blood spots. The in vivo results obtained were also used to study the pharmacokinetics of POS in human plasma. The results obtained were validated and found to be in accordance with those obtained by the reference methods.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A Disposable Carbon Nanotubes‐screen Printed Electrode (CNTs‐SPE) for Determination of the Antifungal Agent Posaconazole in Biological Samples

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Its limit of detection found to be 0.25 μg ml À 1 with a linear range of 5 to 110 μg ml À 1 . [113] Detection of thorium ions were carried out by modified CNT based electrode-using adsorption stripping voltammetric approach. [114] Figure 12 showed a schematic of functionalized CNT modified working electrode employed for detection of metal ions.…”

Section: Recognition Of Metal Cationsmentioning

confidence: 99%

Carbon Nanotubes and its Potential Application in Sensing

Billing

2021

ChemistrySelect

View full text Add to dashboard Cite

This study provides overview of the different type of nanomaterials depending upon their size, and type, however focusing more on the Carbon Nanotubes. This review highlights the different synthesis and purification techniques and also the functionalization methods of Carbon Nanotubes (CNTs). In particular, molecular recognition application of Carbon Nanotubes is explored in the present study. The majority of data was collected for optical and electrochemical studies of Carbon Nanotube based platform for the detection of metal ions, anions, nitroaromatics, biomolecules and gas molecules since last two decades. This review ends with an outlook of future perspectives that could be employed in nano sensor fabrication. I believe this review will act as a road map to guide the new researchers towards the concept of nanofabrication that can be employed to develop Carbon Nanotube based platform for sensing applications.

show abstract

“…Crown ethers are an important class of macrocyclic ligands which display a conspicuous selectivity to metal ions based on the host-guest interaction. In the past few decades, crown ethers have been widely researched and applied in diverse areas since it was discovered by Pedersen in 1967 [10], including isotope separations [11,12], phase transfer catalysts [13,14], ions determination sensors [15,16], ions separation [17,18], and so on. The binding abilities of crown ethers with metal ions are mainly decided by the structures of crown ethers which can be adjusted by the crown cavity size, donor atoms and substituent groups (electron withdrawing or electron donating groups).…”

Section: Introductionmentioning

confidence: 99%

Density functional theory study of selectivity of crown ethers to Li+ in spent lithium-ion batteries leaching solutions

Yao

Zhu

Zhao

et al. 2019

Chinese Journal of Chemical Physics

View full text Add to dashboard Cite

It is a challenge to recover lithium from the leaching solution of spent lithium-ion batteries, and crown ethers are potential extractants due to their selectivity to alkali metal ions. The theoretical calculations for the selectivity of crown ethers with different structures to Li ions in aqueous solutions were carried out based on the density functional theory. The calculated results of geometries, binding energies, and thermodynamic parameters show that 15C5 has the strongest selectivity to Li ions in the three crown ethers of 12C4, 15C5, and 18C6. B15C5 has a smaller binding energy but more negative free energy than 15C5 when combined with Li + , leading to that the lithium ions in aqueous solutions will combine with B15C5 rather than 15C5. The exchange reactions between B15C5 and hydrated Li + , Co 2+ , and Ni 2+ were analyzed and the results show that B15C5 is more likely to capture Li + from the hydrated ions in an aqueous solution containing Li + , Co 2+ , and Ni 2+. This study indicates that it is feasible to extract Li ions selectively using B15C5 as an extractant from the leaching solution of spent lithium-ion batteries.

show abstract

Voltammetric determination of mercury in biological samples using crown ether/multiwalled carbon nanotube-based sensor

Cited by 29 publications

References 27 publications

A Disposable Carbon Nanotubes‐screen Printed Electrode (CNTs‐SPE) for Determination of the Antifungal Agent Posaconazole in Biological Samples

A Disposable Carbon Nanotubes‐screen Printed Electrode (CNTs‐SPE) for Determination of the Antifungal Agent Posaconazole in Biological Samples

Carbon Nanotubes and its Potential Application in Sensing

Density functional theory study of selectivity of crown ethers to Li+ in spent lithium-ion batteries leaching solutions

Contact Info

Product

Resources

About