Trace level voltammetric determination of Zn(II) in selected nutrition related samples by bismuth-oxychloride-multiwalled carbon nanotube composite based electrode

Petrović, Sandra; Rankovic, Nikola; Beljin, Jelena; Rončević, Srđan; Dalmacija, Božo; Ashrafi, Amir M.; Švancara, Ivan; Vytřas, Karel

doi:10.1016/j.microc.2018.12.053

Cited by 19 publications

(8 citation statements)

References 53 publications

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“…During the optimization of MWCNT, Bi 3 + concentration was kept constant at 0.2 ppm, whereas in Bi 3 + concentration optimization amount of MWCNT was kept at 1.0 mg. Concentrations of MWCNT and Bi 3 + to be tested were chosen from the relevant studies in the literature [10,22,23,24]. Highest analyte signals were obtained when 1.0 mg and 1.5 mg of MWCNT was added to 5 mL of ethanol.…”

Section: Optimization Of Electrode Preparation Processmentioning

confidence: 99%

Simultaneous, Selective and Highly Sensitive Voltammetric Determination of Lead, Cadmium, and Zinc via Modified Pencil Graphite Electrodes

et al. 2022

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Pencil graphite electrode (PGE) modified with MWCNT and Bi3+ (MWCNT/Bi/PGE) was utilized in simultaneous analysis of Pb2+, Cd2+, and Zn2+. Surface and electrochemical characteristics of MWCNT/Bi/PGE were investigated via SEM, cyclic voltammetry, electrochemical impedance spectroscopy, and FTIR measurements. Even though modification with MWCNT did not improve the electroactive surface area, it significantly decreased the charge transfer resistance. Furthermore, modification with Bi3+ significantly increased the sensitivity. Finally, MWCNT/Bi/PGE exhibited the highest sensitivity and reproducibility compared to PGE and PGE modified with only MWCNT. MWCNT/Bi/PGE provided LOD values of 0.27, 0.43, and 1.63 μg L−1, and linear ranges of 1–80, 5–80, and 10–80 μg L−1 for Pb2+, Cd2+, and Zn2+, respectively. Proposed modification method offers effective electroanalytical performance with low time consumption and cost for the analyst.

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Section: Optimization Of Electrode Preparation Processmentioning

confidence: 99%

Simultaneous, Selective and Highly Sensitive Voltammetric Determination of Lead, Cadmium, and Zinc via Modified Pencil Graphite Electrodes

et al. 2022

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“…Thus, GCEs are often modified with appropriate materials to improve the electrochemical performance. 8–14 For instance, a GCE modified with porous activated carbon could selectively detect Cd( ii ), Pb( ii ), Cu( ii ) and Hg( ii ) with significantly higher detection sensitivity compared to a bare GCE. 15…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of cadmium(ii), lead(ii), copper(ii) and mercury(ii) using an electrode modified by N/S co-doped graphene

Tan

Wang

et al. 2022

New J. Chem.

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“…Studies indicate that lead is carcinogenic and induces renal tumours in rats and mice and is therefore considered a probable human carcinogen [45,46]. On that basis, lead determination was and will be a fundamental analytical problem [18,30,[47][48][49][50][51]. To ensure drinking-water quality, besides the already-established procedures, new methods are being developed to remove lead ions and other metal ions from water, such as adsorption by functionalized membranes or polymeric nanocomposites [52].…”

Section: Introductionmentioning

confidence: 99%

Pb(II) Determination in a Single Drop Using a Modified Screen-Printed Electrode

2021

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This work presents the development and validation of an electroanalytical method for Pb(II) determination in a single drop. The electrochemical sensors used were an unmodified screen-printed electrode (SPE) and a Bi-film SPE (BiFSPE). Anodic square wave stripping voltammetry (SWASV) was performed at an accumulation potential of −1.5 V vs. Ag/AgCl and an accumulation time of 60 s. Electroanalysis with an unmodified SPE did not yield satisfactory results, whereas the BiFSPE was a much better analysis method. The linear concentration using the BiFSPE was in the range of 138.8–162.5 µg/L. The accuracy and precision were evaluated for different spiked concentrations, but the method using the unmodified SPE was neither accurate nor precise. Using the BiFSPE, the method was found to be both accurate and precise for Pb(II) determination at a concentration of 140.0 μg/L, with recovery and relative standard deviation (RSD) of 106.6% and 12.1%, respectively. In addition, using the BiFSPE, LOD and LOQ values of 1.2 μg/L and 3.3 μg/L were obtained, respectively. The possible interference effect on Pb(II) stripping signal was checked in the presence of Cd(II), Zn(II), Cu(II), Sn(IV), Sb(III), Hg(II), Fe(III), As(V), K(I), I−, Ca(II), and NO3−. Electrochemical impedance spectroscopy measurements were also performed for the unmodified SPE and BiFSPE. The application of single drop Pb(II) analysis was tested by real water sample analysis.

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Trace level voltammetric determination of Zn(II) in selected nutrition related samples by bismuth-oxychloride-multiwalled carbon nanotube composite based electrode

Cited by 19 publications

References 53 publications

Simultaneous, Selective and Highly Sensitive Voltammetric Determination of Lead, Cadmium, and Zinc via Modified Pencil Graphite Electrodes

Simultaneous, Selective and Highly Sensitive Voltammetric Determination of Lead, Cadmium, and Zinc via Modified Pencil Graphite Electrodes

Simultaneous determination of cadmium(ii), lead(ii), copper(ii) and mercury(ii) using an electrode modified by N/S co-doped graphene

Pb(II) Determination in a Single Drop Using a Modified Screen-Printed Electrode

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