Stripping voltammetry with the electrode material acting as a `built-in' internal standard

Wang, Joseph; Kirgöz, Ülkü Anık; Lü, Jian

doi:10.1016/s1388-2481(01)00242-9

Cited by 79 publications

(36 citation statements)

References 7 publications

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“…Since the working electrode surface can easily be renewed by a simple polishing, even very acidic medium have been used for DPASV of heavy metals with bare GECE. In this work the 0.1 M acetate buffer (pH 4.5) as a measuring medium was chosen [8,26].…”

Section: Measuring Parametersmentioning

confidence: 99%

Stripping Voltammetry with Bismuth Modified Graphite‐Epoxy Composite Electrodes

et al. 2005

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The attractive performance of graphite-epoxy composite electrodes (GECE) surface-modified with a bismuth film (Bi-GECE) for simultaneous and separate stripping determination of trace amounts of heavy metals (lead, cadmium and zinc) is described. Several key parameters have been optimized. Bi-GECEi electrode shows superior accumulation properties when compared to bare GECE or even to Hg-GECE. Bi-GECE exhibits well-defined, undistorted, reproducible and sharp stripping signals with RSD of 2.99%, 1.56% and 2.19% for lead, cadmium and zinc respectively. Detection limits of 23.1, 2.2 and 600 mg/L for lead, cadmium and zinc were obtained. Sharp peaks with high resolution (of neighboring signals) that permit convenient multi-elemental measurements resulted. The applicability of the electrodes to the real samples (tap water and soil sample) was also tested and promising results with good recoveries were obtained.

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Section: Measuring Parametersmentioning

confidence: 99%

Stripping Voltammetry with Bismuth Modified Graphite‐Epoxy Composite Electrodes

et al. 2005

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“…Bismuth is used for the modification of different kinds of carbon based electrodes such as carbon paste electrodes, 6,9-11 carbon fiber electrodes, 8 graphite epoxy composite electrodes, 12,13 carbon nanotube nanoelectrode array, 14 carbon film electrodes, 15,16 boron doped diamond 17 and particularly glassy carbon electrodes. [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] It is also used for modification of other types of electrode materials such as screen printed electrodes, 36,37 copper disk electrodes, [38][39][40] pencil lead(II) electrode 41 and electrically heated electrode 42 and they are used for detection of different heavy metal ions such as cadmium, 12,14,21,24,26 lead, 12,21,27,29 zinc, 20,26,27 nickel, 23,28,…”

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confidence: 99%

Electroanalytical Determination of Cadmium(II) and Lead(II) Using an in-situ Bismuth Film Modified Edge Plane Pyrolytic Graphite Electrode

et al. 2007

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A highly sensitive and simple electroanalytical methodology is presented using an in-situ bismuth film modified edge plane pyrolytic graphite electrode (BiF-EPPGE) which is exemplified with the simultaneous determination of cadmium(II) and lead(II). Square-wave anodic stripping voltammetry is utilised with the effects of several experimental variables studied. Simultaneous additions of cadmium(II) and lead(II) were investigated where two linear ranges between 0.1 -100 and 0.1 -300 μg/L and also detection limits of 0.062 and 0.084 μg/L were obtained, respectively. The method was then successfully applied to the simultaneous determination of cadmium(II) and lead(II) in spiked river water, where recoveries of 100.5 and 98% were obtained, respectively. This electroanalytical protocol using edge plane pyrolytic graphite electrodes is one of the simplest methodologies to date using non-mercury based electrodes and is simpler and cheaper than alternatives such as carbon nanotube electrode arrays, suggesting the use of edge plane pyrolytic graphite electrode for routine sensing.

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“…Further increase caused a gradual decrease in the peak current. This can be attributed to the increase in thickness of the composite film as the accumulation time increased, which would affect the electron transfer rate of metal stripping [44,45]. Therefore, the optimum accumulation time was determined as 10 min for the best sensitivity.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical determination of lead(II) ions in hot spring water based on a multi-walled carbon nanotube-modified glassy carbon electrode

Li¹,

Economics²

2018

International Journal of Electrochemical Science

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The present study reports the fabrication of a carbon nanotube/Nafion composite film (MWNT/Nafion)-modified glassy carbon electrode (GCE) along with its excellent performance in the analysis of Pb 2+ (favorable catalytic activity, large surface area, high cation exchange capacity, and strong adsorption ability). The stripping peak current of Pb 2+ was greatly increased at the MWNT/Nafion-coated GCE compared with the bare and Nafion-coated GCEs. The optimization of different parameters was also carried out, including optimization of the accumulation time, accumulation potential, supporting electrolyte, and MWNT/Nafion suspension volume. Therefore, our developed electrode can be used in the analysis of Pb 2+ in real hot spring water samples.

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Stripping voltammetry with the electrode material acting as a `built-in' internal standard

Cited by 79 publications

References 7 publications

Stripping Voltammetry with Bismuth Modified Graphite‐Epoxy Composite Electrodes

Stripping Voltammetry with Bismuth Modified Graphite‐Epoxy Composite Electrodes

Electroanalytical Determination of Cadmium(II) and Lead(II) Using an in-situ Bismuth Film Modified Edge Plane Pyrolytic Graphite Electrode

Electrochemical determination of lead(II) ions in hot spring water based on a multi-walled carbon nanotube-modified glassy carbon electrode

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