Potentials and potentialities of cathodic stripping voltammetry of trace elements in natural waters

Berg, Constant M.G. van den

doi:10.1016/0003-2670(91)85075-4

Cited by 168 publications

(64 citation statements)

References 67 publications

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“…Above this value, ill-defined peaks and very high background currents are obtained. In order to achieve higher frequencies, the pulse width is shortened; as a result sensitivity decreases since the total measured current is markedly affected by the capacitive background current [29]. A frequency of 100 F£z was chosen so as to provide large and well-defined peaks and fast scan rates.…”

Section: Frequencymentioning

confidence: 99%

Nafion-Coated Mercury Film Electrodes for Square Wave Stripping Voltammetry Determination of Lead and Cadmium in Continuous Flow

Neto¹,

Rocha²,

Campos³

2001

Port. Electrochim. Acta

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A Nafion-coated wall-jet mercury film electrode was tested to determine cadmium and lead at trace levels in flowing systems by square wave anodic stripping voltammetry. Optimization of the experimental conditions and square wave parameters is discussed. For a 60 s deposition time, the detection limits restricted by the amount of cadmium and lead in the blank solution were lxlO" 9 M and lxlO" 10 M respectively. In comparison with the conventional mercury film electrode, the resistance to Triton X-100 interference was found to be superior with the Nafion film coating. The modified electrode was applied to trace metal detenninations in real environmental samples.

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Section: Frequencymentioning

confidence: 99%

Nafion-Coated Mercury Film Electrodes for Square Wave Stripping Voltammetry Determination of Lead and Cadmium in Continuous Flow

Neto¹,

Rocha²,

Campos³

2001

Port. Electrochim. Acta

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“…In recent years, accumulation of the analyte through the adsorption of a metal-chelate has proven to be an effective means to improve the sensitivity and selectivity of stripping voltammetry [17]. For example, the selective adsorptive collection of the tellurium-8-quinolinol (oxine) complex on a hanging mercury drop electrode followed by CSV was employed by Wang et al [18] for the determination of trace tellurium.…”

Section: Introductionmentioning

confidence: 99%

Cathodic Stripping Voltammetric Determination of Tellurium(IV) in Chloride Media Using a Tosflex/8-Quinolinol Mercury Film Electrode

Yang

Sun²

1999

Electroanalysis

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A Tos¯exa8-quinolinol (oxine) coated mercury ®lm electrode (TOMFE) was developed for the determination of tellurium(IV) by squarewave cathodic voltammetry. The electrode is prepared by spin-coating a Tos¯exaoxine solution onto the glassy carbon electrode surface. Subsequently, mercury is plated onto the electrode surface. Tellurium(IV) is preconcentrated, as TeCl 2À 6 in the chloride medium, onto the modi®ed electrode by the ion-exchange effect of the Tos¯ex and the chelating effect of oxine. Good sensitivity was achieved through the catalytic process between oxine and tellurium. In comparison with the conventional mercury electrode, the TOMFE showed improved resistance to interferences from surface-active compounds on the determination of tellurium(IV). The interferences from metal ions, such as cadmium(II) and molybdenum(VI), which are capable of forming complexes with oxine were effectively eliminated by the addition of ethylenediaminetetraacetate (EDTA) in the sample solution. The TOMFE is easy to prepare and chemically more stable than other anionexchange polymer modi®ed electrodes such as polyvinylpyridine modi®ed mercury ®lm electrode.

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“…Their important feature is electro activity which makes them an important reagent for the voltammetric determination of metal ions [1][2][3]. Recently, many researchers developed a sensitive method for the determination of metal ions with heterocyclic azo compounds as complexemetric agents by polarographic and voltammetric techniques.…”

Section: Introductionmentioning

confidence: 99%

New Cyclic Voltammetry of 3-(4-N-Pyridine-2-yl Benzene Sulfonamide Azo)-1-Nitroso Naphthol and the Use of it for Enhancement of Cobalt Oxide Nano Particles

Mohammed¹

2017

Nano BioMed ENG

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The electrochemical behavior of the 3-(4-N-pyridine-2-yl benzene sulfonamide azo)-1-nitroso naphthol reagent and its complex with Co (II) has been studied at glassy carbon disk electrode in different supporting electrolyte at concentration 1 mol and scan rate (100 mV/s). 3-(4-N-pyridine-2-yl benzene sulfonamide azo)-1-nitroso naphthol was used for enhance the properties of nano cobalt oxide by ligand exchange reaction on nanoparticles.

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Potentials and potentialities of cathodic stripping voltammetry of trace elements in natural waters

Cited by 168 publications

References 67 publications

Nafion-Coated Mercury Film Electrodes for Square Wave Stripping Voltammetry Determination of Lead and Cadmium in Continuous Flow

Nafion-Coated Mercury Film Electrodes for Square Wave Stripping Voltammetry Determination of Lead and Cadmium in Continuous Flow

Cathodic Stripping Voltammetric Determination of Tellurium(IV) in Chloride Media Using a Tosflex/8-Quinolinol Mercury Film Electrode

New Cyclic Voltammetry of 3-(4-N-Pyridine-2-yl Benzene Sulfonamide Azo)-1-Nitroso Naphthol and the Use of it for Enhancement of Cobalt Oxide Nano Particles

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