Determination of Lead and Cadmium at Silver Electrode by Subtractive Anodic Stripping Voltammetry in Plant Materials Containing Tl

Krasnodębska‐Ostręga, Beata; Piekarska, J.

doi:10.1002/elan.200403158

Cited by 34 publications

(13 citation statements)

References 13 publications

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“…There are several methods proposed for the analysis of various metal ions, such as potentiometry [2,3], anodic stripping voltammetry [4], fluorescence spectroscopy [5] and UV-visible spectroscopy [6]. The sensitivity of the method varies depending on the technique used, 0.6 mM for potentiometry [2], 0.1 mM for fluorescence spectroscopy [5] and 10 mM for UV spectroscopic methods [6].…”

Section: Introductionmentioning

confidence: 99%

Exfoliated Graphite Oxide Modified Electrode for the Selective Determination of Picomolar Concentration of Lead

Ramesha¹,

Sampath²

2007

Electroanalysis

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We report the selective, picomolar determination of lead(II) ions using exfoliated graphite oxide (EGO) modified glassy carbon electrode. Exfoliated graphite oxide is the oxidized form of exfoliated graphite containing a variety of functional groups such as hydroxyl, phenolic and carboxyl groups. The EGO can be dispersed as a stable colloid in a wide range of pH, from 2 to 11. This leads to the flexibility of film formation on substrates and use of a variety of functional groups to complex lead ions. The analyte is preconcentrated and subsequently determined using differential pulse anodic stripping voltammetry. The factors influencing the determination of lead such as the pH of the analyte solution, preconcentration time and the thickness of EGO layer on the electrode surface have been optimized. Two linear ranges are observed between 1 mM and 10 mm and 0.1 mM and 1 pM for a 5 minute preconcentration time. The lowest detection limit is found to be 1 pM. The main advantages of the electrode are the ease of preparation of the modified electrode, low cost, sensitivity and selectivity. The analytical utility of the EGO modified electrode in the determination of lead is demonstrated by application to several water samples.

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Section: Introductionmentioning

confidence: 99%

Exfoliated Graphite Oxide Modified Electrode for the Selective Determination of Picomolar Concentration of Lead

Ramesha¹,

Sampath²

2007

Electroanalysis

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“…To date, a great number of electrochemical sensors have been developed for Pb 2+ utilizing all kinds of working electrodes [7][8][9][10][11]. Otherwise, previous reports have proven the fact that anion ions can induce some metal ions to adsorb at electrode surface [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 98%

Iodide-induced adsorption of lead(II) ion on a glassy carbon electrode modified with ferroferric oxide nanoparticles

Yang

Dai

2012

Microchim Acta

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Spherical Fe 3 O 4 nanoparticles (NPs) were prepared by hydrothermal synthesis and characterized by scanning electron microscopy and X-ray diffraction. A glassy carbon electrode was modified with such NPs to result in a sensor for Pb(II) that is based on the strong inducing adsorption ability of iodide. The electrode gives a pair of well-defined redox peaks for Pb(II) in pH 5.0 buffer containing 10 mM concentrations of potassium iodide, with anodic and cathodic peak potentials at −487 mV and −622 mV (vs. Ag/AgCl), respectively. The amperometric response to Pb(II) is linear in the range from 0.10 to 44 nM, and the detection limit is 40 pM at an SNR of 3. The sensor exhibits high selectivity and reproducibility.

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“…However, the toxicity, instability and difficulties in handling, storage, and disposal of mercury electrode may severely restrict its application [9]. Therefore, many electrodes such as bismuth film electrodes [10], gold-coated electrodes [11], silver electrodes [12], glassy carbon electrodes [13,14], screen-printed carbon electrodes [15], and carbon paste electrodes [16] have been favorably replaced for the mercury electrode for sensitive heavy metal determinations.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical sensor for lead(II) ion using a carbon ionic-liquid electrode modified with a composite consisting of mesoporous carbon, an ionic liquid, and chitosan

Zhai

Gao

et al. 2012

Microchim Acta

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A novel electrode was prepared that enables sensing of lead(II) ion. A suspension composed of ordered mesoporous carbon (OMC), an ionic liquid (IL), and chitosan was deposited on the highly conductive surface of a carbon ionic-liquid electrode (CILE). The surface of the sensing electrode was characterized by scanning electron microscopy and cyclic voltammetry. The new electrode can be used to determine lead(II) ion because the hydrophobic ionic liquid of the CILE can extract Pb(II), while the OMC accelerates the electron transfer rate between the electrode and Pb(II) and also strongly adsorbs Pb(II). The resulting electrode displays excellent and synergistic response to Pb(II) which is linear in the range from 0.05 to 1.4 μM, with a correlation coefficient of 0.997 and a detection limit of 25 nM.

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Determination of Lead and Cadmium at Silver Electrode by Subtractive Anodic Stripping Voltammetry in Plant Materials Containing Tl

Cited by 34 publications

References 13 publications

Exfoliated Graphite Oxide Modified Electrode for the Selective Determination of Picomolar Concentration of Lead

Exfoliated Graphite Oxide Modified Electrode for the Selective Determination of Picomolar Concentration of Lead

Iodide-induced adsorption of lead(II) ion on a glassy carbon electrode modified with ferroferric oxide nanoparticles

Electrochemical sensor for lead(II) ion using a carbon ionic-liquid electrode modified with a composite consisting of mesoporous carbon, an ionic liquid, and chitosan

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