A highly sensitive, selective and renewable carbon paste electrode based on a unique acyclic diamide ionophore for the potentiometric determination of lead ions in polluted water samples

Zayed, M.A.; Mahmoud, Walaa H.; Abbas, Ashraf A.; Ali, Aya E.

doi:10.1039/d0ra01435d

Cited by 26 publications

(24 citation statements)

References 54 publications

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“…This selectivity in complexation explains the selectivity of the potentiometric responses. In addition, the performances of an ISE sensor were mainly related to the stability of ion to ionophore formed complex 19 . Due to the presence of donating atoms (nitrogen and oxygen) in the structure of the proposed ionophore, it seemed to form strong complexes with transition metal ions.…”

Section: Resultsmentioning

confidence: 99%

“…The selectivity coefficient is a measure used to evaluate the effect of interfering ions on the response of ion‐selective electrodes. The selectivity coefficients were determined by the separate solution method (SSM) and calculated according to Eqn (1): 19

K_{i, j}^{pot} goodbreak= a_{i}^{(1 - \frac{Z_{i}}{Z_{j}})} e^{((), E_{j} goodbreak- E_{i}) \frac{Z_{i} F}{italicRT}}

where a and Z are the activity and charge of the main (i) and interfering (j) ions, respectively. F is the Faraday constant (9.6485309 × 10 4 C mol −1 ), R is the universal gas constant (8.314510 J K −1 mol −1 ), and T is the absolute temperature.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the performances of an ISE sensor were mainly related to the stability of ion to ionophore formed complex. 19 Due to the presence of donating atoms (nitrogen and oxygen) in the structure of the proposed ionophore, it seemed to form strong complexes with transition metal ions. Thus, in preliminary experiments, several CPE electrodes were prepared to have the following composition: 5% ionophore, 20% paraffin oil, 70% graphite powder, and 5% functionalized-MWCNTs.…”

Section: Resultsmentioning

confidence: 99%

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Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Barati

Masroornia

Es’haghi

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Potentiometric detections based on ion‐selective electrodes offer the advantages of simplicity, speed, and low cost over other electrochemical methods. In this work, the preparation of a novel carbon‐paste electrochemical sensor containing the synthesized N‐(1‐(4‐bromophenyl)‐3‐oxo‐3‐phenylpropyl)acetamide is described. Multi‐walled carbon nanotubes (MWCNTs) were incorporated into the electrode composition to promote electron transfer reactions. The modified carbon paste electrode was evaluated as a selective sensor for the detection of chromium (III). RESULTS The prepared sensor showed nearly stable potentials in the pH range of 4.0–6.5, with a fast response time (<15 s). At the optimum conditions, the potentiometric method exhibited a linear response toward Cr(III) concentration in the range of 5.0 × 10−7 to 1.0 × 10−3 mol L−1 with a Nernstian slope of 19.5 ± 0.1 mV per decade and a detection limit of 3.1 × 10−7 mol L−1. CONCLUSION The proposed sensor possesses the advantages of good selectivity to Cr(III) and an improved detection limit compared to the results of some other studies. Better selectivity can be attributed to the ability of the ionophore to form a stable chelate with Cr(III) ions. The new Cr(III) sensor showed excellent stability over 8 weeks and its response time was comparable to other previously reported chromium ion‐selective electrodes (ISEs) . The simple, fast, and cheap synthesis method of ionophore provided other advantages for this study. The modified electrode was also used as a sensor for the end‐point detection in the potentiometric titration of Cr(III) against ethylenediaminetetra acetic acid (EDTA). © 2021 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

K_{i, j}^{pot} goodbreak= a_{i}^{(1 - \frac{Z_{i}}{Z_{j}})} e^{((), E_{j} goodbreak- E_{i}) \frac{Z_{i} F}{italicRT}}

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Barati

Masroornia

Es’haghi

et al. 2022

J of Chemical Tech & Biotech

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“…Some materials were reported as Al(III)-ionophores. ,− Reported Al(III) sensors − were poly(vinyl chloride) (PVC) membrane-based sensors and they have many disadvantages such as the system impedance and a shorter life span because of the leaching of the electroactive material in contact with the membrane in both solutions. However, carbon-paste electrodes (CPEs), in particular, are an excellent analytical tool because of their ease of fabrication, low Ohmic resistance, and renewability. ,, …”

Section: Introductionmentioning

confidence: 99%

Potentiometric Determination of the Al(III) Ion in Polluted Water and Pharmaceutical Samples by a Novel Mesoporous Copper Metal–Organic Framework-Modified Carbon Paste Electrode

Mahmoud

Fouad

Ali

2021

Ind. Eng. Chem. Res.

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Metal−organic frameworks (MOFs) are attractive materials to be used as ionophores because of the array of nurturing features for instance a significant surface area, a porous structure, and also electrocatalytic activity. Aluminum is an important metal regarding its many applications such as in industry, biology, medicine, and so forth, so its estimation in very low levels is a challenging mission. Herein, a carbon paste electrode has been developed based on a novel prepared Cu-MOF with a nano-Schiff base linker. The prepared ionophore was characterized using many analytical and spectroscopic methods. The X-ray diffraction data suggested that the newly synthesized Cu-MOF has a mesoporous structure. For Al(III) determination in different real water and pharmaceutical samples, the established electrode has been successfully used with high precision (RSD% = 0.82−1.98) and accuracy (recovery % = 98.0−101.2) and showed good agreement with the atomic absorption spectroscopy results. The sensor under study exhibited Nernstian behavior toward the Al(III) ion (19.89 ± 0.63 mV decade −1 ) wrapping a large linear range of 1.0 × 10 −7 to 1.0 × 10 −1 mol L −1 with a low detection limit of 3.31 × 10 −8 mol L −1 . The working pH was 2.3−6.5 and the response time was 6 s. The fabricated sensor was highly selective for Al(III) ions. The response mechanism and surface reaction have been studied via scanning electron microscopy combined with energy-dispersive X-ray analysis and Fourier-transform infrared analysis.

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“…When making carbon paste, one must keep in mind the mechanical stability of the paste and its active surface [37]. This function is supposed to be carried by the plasticizer, i.e., it is the main role of the plasticizer used in the preparation of the paste.…”

Section: Influence Of the Plasticizermentioning

confidence: 99%

Two Rival Newly Fabricated Potentiometric Sensors to Enhance Selectivity Toward Cu(II) Ions

et al. 2021

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Utilizing the well-known ability of Schiff base ligands to bind metal ions, two newly fabricated ligands, namely: 2-((2-hydroxybenzylidene)amino)benzoic acid (L1) and 2-(furan-2-ylmethyleneamino)phenol (L2) were employed to coordinate copper(II) (Cu(II)) producing the characteristically stable complexes that performed as the ionophores in the presently fabricated electrodes A and B. Thus it was possible to build these electrodes that have attractive properties and expected behavior, namely, low detection limits: 2.32 × 10–7 and 1.14 × 10–6 M Cu(II), Nernstian slope of 29.13 and 30.85 mV/decade Cu(II), broad concentration ranges from 3.98 × 10–7–1.00 × 10–2 and 1.52 × 10–6–1.00 × 10–2 M for sensors A and B, respectively, as well as short response time (ca. 3–5 s) with distinct selectivity toward Cu(II) over the other cations and applicability over the pH range 1.5–5.5 for miscellaneous samples: aqueous solutions, urine, and blood serum. Thus, these sensors surpass many others towards fulfilling the intended function of Cu(II) determination in various applications.

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A highly sensitive, selective and renewable carbon paste electrode based on a unique acyclic diamide ionophore for the potentiometric determination of lead ions in polluted water samples

Abstract: Due to the toxicity of lead(ii) to all living organisms destroying the central nervous system and leading to circulatory system and brain disorders, the development of effective and selective lead(ii) ionophores for its detection is very important.

Cited by 26 publications

References 54 publications

Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Potentiometric Determination of the Al(III) Ion in Polluted Water and Pharmaceutical Samples by a Novel Mesoporous Copper Metal–Organic Framework-Modified Carbon Paste Electrode

Two Rival Newly Fabricated Potentiometric Sensors to Enhance Selectivity Toward Cu(II) Ions

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