Determination of trace metals by anodic stripping voltammetry using a bismuth-modified carbon nanotube electrode

Hwang, Gil Ho; Han, Wei; Park, Joon‐Shik; Kang, Sung Goon

doi:10.1016/j.talanta.2008.02.039

Cited by 321 publications

(150 citation statements)

References 29 publications

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“…The detection limit was given by the equation C L ¼ 3s bl =S, where s bl is the standard deviation of the blank measurements and S is the sensitivity of the calibration graph. The detection limit of Zn 2+ for 60 s accumulation was calculated to be 0.05 μM, which is lower than that at Bi-modified carbon nanotube electrode [34], Hg-coated glassy carbon electrode [35], the polymer-coated Bi film electrode [36], while higher than that at the tin-film electrode (with 120 s of accumulation) [25] and the BiBE (with 180 s of accumulation) [20]. Although a lower detection limit can be obtained at the SnBiE with a prolonged accumulation time, a short analysis time is sufficient for determination of Zn 2+ in real samples.…”

Section: Calibration Curvementioning

confidence: 75%

A novel tin-bismuth alloy electrode for anodic stripping voltammetric determination of zinc

et al. 2011

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We report on a novel tin-bismuth alloy electrode (SnBiE) for the determination of trace concentrations of zinc ions by square-wave anodic stripping voltammetry without deoxygenation. The SnBiE has the advantages of easy fabrication and low cost, and does not require a pre-treatment (in terms of modification) prior to measurements. A study on the potential window of the electrode revealed a high hydrogen overvoltage though a limited anodic range due to the oxidation of tin. The effects of pH value, accumulation potential, and accumulation time were optimized with respect to the determination of trace zinc(II) at pH 5.0. The response of the SnBiE to zinc(II) ion is linear in the 0.5-25 μM concentration range. The detection limit is 50 nM (after 60 s of accumulation). The SnBiE was applied to the determination of zinc(II) in wines and honeys, and the results were consistent with those of AAS.

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Section: Calibration Curvementioning

confidence: 75%

A novel tin-bismuth alloy electrode for anodic stripping voltammetric determination of zinc

et al. 2011

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“…For 5 min accumulation, a proportional relationship between the stripping peak current (i p ) and the concentration of Pb 2+ was obtained in the range of 1.0 to 90 nM (i p ¼ 20.11 + 0.12C, r ¼ 0.995, i p in mA, C in nM) with a sensitivity of 0.12 mA/nM. The detection limit given by the equation C L ¼ 3s bl /S was calculated to be 0.3 nM, which is lower than that of the carbon paste electrode [25], the Hg-coated GCE [26], the polymer-coated Bi film electrode [27] and the Bi-modified carbon nanotube electrode [28] and so on. It can be proved that the resulting BiNPs/NA/GCE have a wider linear dynamic range, lower detection limit and larger sensitivity than most of the other methods for voltammetric stripping determination of Pb 2+ .…”

mentioning

confidence: 91%

Site synthesis of bismuth nanoparticles for electrochemical determination of lead

Wu¹,

Lü²,

Kang³

et al. 2012

Micro Nano Lett.

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A report is presented on a novel and effective route to synthesise bismuth nanoparticles (BiNPs) on the electrode surface, which was carried out by ion-exchange in Nafion film coated on the electrode surface and subsequent electrochemical reduction of Bi 3+ ions to BiNPs on site. The properties of the resulting BiNPs modified electrode were investigated by scanning electron microscopy, an energy dispersive X-ray microanalyser and electrochemistry. Almost 10 nm BiNPs were decorated in the matrix of Nafion film and showed excellent electrochemical activity. The BiNPs modified electrode has been successfully used for determination of Pb 2+ by anodic stripping voltammetry with a linear range of 1.0 -90 nM. The detection limit is 0.3 nM with 5 min accumulation. The practical application of this modified electrode was carried out for determination of Pb 2+ in water samples and the results were consistent with those obtained by inductively coupled plasma-mass spectrometry.

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“…The bismuth alone (bismuth bulk electrode [26], or a bismuth film [27]) or modified by carbon nanotubes [28], was used for titration (by anodic stripping voltammetries) of mixtures of lead, cadmium, zinc, or indium; low detection limits (~1 µg/L) seems to be achieved. Since its introduction by Ralph Norman Adams [31] as an alternative to the mercury electrode, the carbon paste electrode has been largely used for its ad- …”

Section: Introductionmentioning

confidence: 99%

Determination of Lead in Water by Linear Sweep Anodic Stripping Voltammetry (LSASV) at Unmodified Carbon Paste Electrode: Optimization of Operating Parameters

Mouhamed¹,

Kane²,

Rokhy³

et al. 2018

AJAC

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This study presents the elaboration of a simple and cheap electrode made by carbon paste introduced into a cavity of electrode body, and used for the lead traces determination in tap water. A potentiostatic pre-electrolysis at constant voltage enables the reduction of the lead (Pb 2+ ) and the accumulation of the metallic lead at and into the carbon paste; the reoxidation of the Pb (Linear sweep voltammetry) leads to the anodic striping peak. The effect of the main operating parameters on the shape of the peak and the magnitude of the current was examined and their optimal values were determined. Then calibration was achieved and the method was successfully applied (using all the optimized parameters) to the determination of lead in water, with a detection limit of 0.138 µg•L −1. Compared to other methods (ICP-AES for example), the proposed method offers a satisfactory detection limit of the Pb 2+ (0.138 µg•L −1

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Determination of trace metals by anodic stripping voltammetry using a bismuth-modified carbon nanotube electrode

Cited by 321 publications

References 29 publications

A novel tin-bismuth alloy electrode for anodic stripping voltammetric determination of zinc

A novel tin-bismuth alloy electrode for anodic stripping voltammetric determination of zinc

Site synthesis of bismuth nanoparticles for electrochemical determination of lead

Determination of Lead in Water by Linear Sweep Anodic Stripping Voltammetry (LSASV) at Unmodified Carbon Paste Electrode: Optimization of Operating Parameters

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